阅读说明：本技术 核磁共振系统、射频发射信号校正方法、装置和医疗设备 (Nuclear magnetic resonance system, radio frequency emission signal correction method and device and medical equipment ) 是由 朱旭晨 于 2021-08-04 设计创作，主要内容包括：本申请涉及一种核磁共振系统、射频发射信号校正方法、装置和医疗设备,涉及核磁共振技术领域。核磁共振系统包括处理组件、多个系统射频发射通道以及至少一个射频发射线圈,其中,射频发射线圈包括至少一个射频线圈发射通道；各系统射频发射通道均能够与任一射频线圈发射通道插接,并能够从插接的射频线圈发射通道上拔下；处理组件,用于根据相互插接的系统射频发射通道和射频线圈发射通道所分别对应的幅度增益和相位对总射频发射通道发出的射频发射信号进行校准；总射频发射通道由相互插接的系统射频发射通道和射频线圈发射通道组成。采用本申请的核磁共振系统能够提高核磁共振系统进行扫描的效率。(The application relates to a nuclear magnetic resonance system, a radio frequency emission signal correction method, a radio frequency emission signal correction device and medical equipment, and relates to the technical field of nuclear magnetic resonance. The nuclear magnetic resonance system comprises a processing assembly, a plurality of system radio frequency transmitting channels and at least one radio frequency transmitting coil, wherein the radio frequency transmitting coil comprises at least one radio frequency coil transmitting channel; each system radio frequency transmitting channel can be plugged with any radio frequency coil transmitting channel and can be pulled out from the plugged radio frequency coil transmitting channel; the processing component is used for calibrating the radio frequency transmitting signals sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced. The nuclear magnetic resonance system can improve the scanning efficiency of the nuclear magnetic resonance system.)

1. A nuclear magnetic resonance system comprising a processing assembly, a plurality of system radio frequency transmit channels, and at least one radio frequency transmit coil, wherein the radio frequency transmit coil comprises at least one radio frequency coil transmit channel;

each system radio frequency transmitting channel can be plugged with any radio frequency coil transmitting channel;

the processing component is used for calibrating the radio frequency transmitting signals sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

2. The nmr system of claim 1, wherein the processing assembly is specifically configured to:

calibrating the amplitude of a radio frequency transmitting signal transmitted by a total radio frequency transmitting channel according to the amplitude gain respectively corresponding to a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually inserted;

and calibrating the phase of the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the phases respectively corresponding to the mutually-inserted system radio frequency transmitting channel and the radio frequency coil transmitting channel.

3. The nmr system of claim 2, wherein the total rf transmit channel comprises a plurality of channels, and wherein the processing assembly is specifically configured to: obtaining amplitude gain relation among radio frequency transmitting signals sent by a plurality of total radio frequency transmitting channels;

and calibrating the amplitude of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the amplitude gain relation and the amplitude gain corresponding to each total radio frequency transmitting channel.

4. The nmr system of claim 2, wherein the total rf transmit channel comprises a plurality of channels, and wherein the processing assembly is specifically configured to: acquiring phase relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels;

and calibrating the phase of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the phase relation and the phase corresponding to each total radio frequency transmitting channel.

5. The nmr system of claim 3, wherein the processing assembly is specifically configured to: and under the condition that the amplitude gain relationship is that the amplitude gains of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, multiplying the amplitude of each radio frequency transmitting signal by a corresponding amplitude calibration value.

6. The NMR system of claim 4, wherein the processing assembly is specifically configured to: and under the condition that the phase relation is that the phases of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, subtracting the corresponding phase calibration value from the phase of each radio frequency transmitting signal.

7. The nmr system of claim 1, wherein the processing component, prior to calibrating the rf transmit signals from the total rf transmit channel according to the respective corresponding amplitude gain and phase of the plugged system rf transmit channel and rf coil transmit channel, is further configured to:

acquiring total radio frequency transmitting channels generated after each radio frequency coil transmitting channel is connected with each system radio frequency transmitting channel;

acquiring FID signals or/and images corresponding to the total radio frequency emission channels, and determining the amplitude and the phase corresponding to the FID signals or/and images;

and inputting the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model to obtain the amplitude gain and the phase corresponding to each radio frequency coil transmitting channel and the amplitude gain and the phase corresponding to each system radio frequency transmitting channel.

8. A method for calibrating a radio frequency emission signal, applied to the nmr system of any one of claims 1-7, the method comprising:

determining a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced in a plurality of system radio frequency transmitting channels and a plurality of radio frequency coil transmitting channels which are included in the nuclear magnetic resonance system;

and calibrating the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually spliced, wherein the total radio frequency transmitting channel consists of the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually spliced.

9. An apparatus for correcting a radio frequency transmission signal, the apparatus comprising:

the nuclear magnetic resonance system comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced in a plurality of system radio frequency transmitting channels and a plurality of radio frequency coil transmitting channels which are included in the nuclear magnetic resonance system;

the calibration module is used for calibrating the radio frequency transmitting signals sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

10. A medical device comprising a memory storing a computer program, wherein the medical device comprises a medical device body, a magnetic resonance system and a scanning bed, and a processor for performing the steps of the method of claim 8 when the computer program is executed.

Technical Field

The application relates to the technical field of nuclear magnetic resonance, in particular to a nuclear magnetic resonance system, a radio frequency emission signal correction method, a radio frequency emission signal correction device and medical equipment.

Background

With the rapid development of medical technology, the nuclear magnetic resonance imaging technology is more and more mature. The nuclear magnetic resonance imaging not only can display tangible solid lesions, but also can accurately judge functional reactions of brain, heart, liver and the like. In high-field and ultra-high-field nuclear magnetic resonance systems, two radio frequency transmission channels are generally used to process radio frequency transmission signals, and then the radio frequency transmission signals with fixed amplitude and phase are obtained respectively, and the obtained radio frequency transmission signals with fixed amplitude and phase are transmitted to a scanned part. Changes in electrons within the scanned region are acquired, and an image is generated from the electrons within the scanned region. Wherein each complete radio frequency transmission channel consists of a system radio frequency transmission channel and a radio frequency coil transmission channel.

In the conventional technology, the radio frequency transmission channel has low flexibility in the using process and has a lot of inconvenience in the using process, so that the scanning efficiency of the nuclear magnetic resonance system is influenced.

Disclosure of Invention

In view of the above, it is necessary to provide a nuclear magnetic resonance system, a radio frequency emission signal correction method, a radio frequency emission signal correction apparatus, and a medical device, which can improve the efficiency of scanning by the nuclear magnetic resonance system.

In a first aspect, a nuclear magnetic resonance system is provided, the nuclear magnetic resonance system comprising a processing assembly, a plurality of system radio frequency transmit channels, and at least one radio frequency transmit coil, wherein the radio frequency transmit coil comprises at least one radio frequency coil transmit channel; each system radio frequency transmitting channel can be inserted with any radio frequency coil transmitting channel; the processing component is used for calibrating the radio frequency transmitting signals sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

In one embodiment, the processing component is specifically configured to: calibrating the amplitude of a radio frequency transmitting signal transmitted by a total radio frequency transmitting channel according to the amplitude gain respectively corresponding to a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually inserted; and calibrating the phase of the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the phases respectively corresponding to the mutually-inserted system radio frequency transmitting channel and the radio frequency coil transmitting channel.

In one embodiment, the total rf transmit channel includes a plurality of, processing components, specifically configured to: obtaining amplitude gain relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the amplitude of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the amplitude gain relation and the amplitude gain corresponding to each total radio frequency transmitting channel.

In one embodiment, the total rf transmit channel includes a plurality of, processing components, specifically configured to: acquiring phase relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the phases of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels according to the phase relation and the phases corresponding to the total radio frequency transmitting channels respectively.

In one embodiment, the processing component is specifically configured to: and under the condition that the amplitude gain relationship is that the amplitude gains of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, multiplying the amplitude of each radio frequency transmitting signal by the corresponding amplitude calibration value.

In one embodiment, the processing component is specifically configured to: and under the condition that the phase relation is that the phases of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, subtracting the corresponding phase calibration value from the phase of each radio frequency transmitting signal.

In one embodiment, before the processing component calibrates the rf transmission signal sent by the total rf transmission channel according to the amplitude gain and the phase corresponding to the system rf transmission channel and the rf coil transmission channel that are plugged with each other, the processing component is further configured to: acquiring each total radio frequency transmitting channel generated after each radio frequency coil transmitting channel is connected with each system radio frequency transmitting channel; acquiring FID signals or/and images corresponding to the total radio frequency transmitting channels, and determining the amplitude and the phase corresponding to the FID signals or/and images; and inputting the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model to obtain the amplitude gain and the phase corresponding to each radio frequency coil transmitting channel and the amplitude gain and the phase corresponding to each system radio frequency transmitting channel.

In a second aspect, there is provided a method for calibrating a radio frequency emission signal, which is applied to the nmr system of any one of claims 1 to 7, the method comprising: determining a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced in a plurality of system radio frequency transmitting channels and a plurality of radio frequency coil transmitting channels which are included in a nuclear magnetic resonance system; and calibrating the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the mutually-inserted system radio frequency transmitting channel and the radio frequency coil transmitting channel respectively, wherein the total radio frequency transmitting channel consists of the mutually-inserted system radio frequency transmitting channel and the radio frequency coil transmitting channel.

In a third aspect, there is provided an apparatus for correcting a radio frequency transmission signal, the apparatus comprising:

the nuclear magnetic resonance system comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually inserted in a plurality of system radio frequency transmitting channels and a plurality of radio frequency coil transmitting channels which are included in the nuclear magnetic resonance system;

the calibration module is used for calibrating the radio frequency transmitting signals sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

In a fourth aspect, a medical apparatus is provided, which includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that the medical apparatus includes a medical apparatus body, a nuclear magnetic resonance system, and a scanning bed, and the processor implements the radio frequency emission signal correction method according to any one of the second aspects when executing the computer program.

The nuclear magnetic resonance system comprises a processing assembly, a plurality of system radio frequency transmitting channels and at least one radio frequency transmitting coil, wherein the radio frequency transmitting coil comprises at least one radio frequency coil transmitting channel; each system radio frequency transmitting channel can be plugged with any radio frequency coil transmitting channel and can be pulled out from the plugged radio frequency coil transmitting channel; the processing component is used for calibrating the radio frequency transmitting signals sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced. The radio frequency coil transmitting channel in the radio frequency transmitting coil in the nuclear magnetic resonance system and the system radio frequency transmitting channel are plugged in and pulled out, so that at least one radio frequency transmitting coil can be selected according to the condition of a patient and the actual requirement, and at least one radio frequency coil transmitting channel in the radio frequency transmitting coil is connected with the system radio frequency transmitting channel. Therefore, the flexibility of the nuclear magnetic resonance system is improved, the nuclear magnetic resonance scanning workflow is optimized, and the time is saved. In addition, a processing component in the nuclear magnetic resonance system calibrates the radio frequency transmitting signal sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged. Therefore, when a scanner is connected with the system radio frequency transmitting channel and the radio frequency coil transmitting channel according to the scanning requirement, the circular polarization of radio frequency transmission can be directly scanned and used, and the transmitting efficiency and the image quality are improved.

Drawings

FIG. 1 is a schematic diagram of a nuclear magnetic resonance system in one embodiment;

FIG. 2 is a schematic flow chart illustrating the process for determining the amplitude gain and phase corresponding to each RF coil transmit channel and the amplitude gain and phase corresponding to each system RF transmit channel in the NMR system in one embodiment;

FIG. 3 is a schematic flow chart of an exemplary RF transmit signal calibration procedure;

FIG. 4 is a schematic flow chart of a calibration method for RF transmission signals in another embodiment;

FIG. 5 is a schematic flow chart of a method for calibrating an RF transmit signal in another embodiment;

FIG. 6 is a schematic flow chart of a method for calibrating an RF transmit signal in another embodiment;

FIG. 7 is a schematic flow chart illustrating a method for calibrating an RF transmit signal in another embodiment;

FIG. 8 is a block diagram of an exemplary RF transmit signal calibration apparatus;

FIG. 9 is a block diagram of an exemplary RF transmit signal calibration apparatus;

FIG. 10 is a block diagram showing the structure of an RF transmission signal correction apparatus according to an embodiment;

FIG. 11 is an internal block diagram illustrating a computer device in the form of a server in one embodiment;

fig. 12 is an internal configuration diagram of a case where the computer device is a terminal in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The following describes the technical solutions of the present application and how to solve the technical problems with the technical solutions of the present application in detail with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The present application provides a nuclear magnetic resonance system, as shown in fig. 1, comprising a processing assembly, a plurality of system radio frequency transmit channels, and at least one radio frequency transmit coil, wherein the radio frequency transmit coil comprises at least one radio frequency coil transmit channel.

In the embodiment of the present application, the processing component included in the nmr system may be a computer device, and the computer device may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, portable wearable devices, and the like.

In order to facilitate the nuclear magnetic resonance scanning of the patient, a plurality of system radio frequency transmission channels and at least one radio frequency transmission coil can be ensured in the nuclear magnetic resonance system, wherein the number of the radio frequency transmission coils is not specifically limited in the present application. In addition, the radio frequency transmitting coil can be used for scanning the head, the abdomen, the legs and other parts of the patient, and the function of the radio frequency transmitting coil is not particularly limited in the embodiments of the present application.

Each system radio frequency transmitting channel can be plugged with any radio frequency coil transmitting channel and can be pulled out from the plugged radio frequency coil transmitting channel.

When the nuclear magnetic resonance scanning is carried out on a patient, each radio frequency coil transmitting channel can be plugged with any system radio frequency transmitting channel, and the nuclear magnetic resonance scanning is carried out on the patient by utilizing the system radio frequency transmitting channels and the radio frequency coil transmitting channels which are mutually plugged.

It should be noted that, when performing a nuclear magnetic resonance scan on a patient, at least one radio frequency transmission coil may be selected according to the condition of the patient and the actual needs, wherein at least one radio frequency coil transmission channel in each radio frequency transmission coil is connected to a system radio frequency transmission channel.

After completing the nuclear magnetic resonance scanning of the patient, each radio frequency coil transmitting channel can be detached from the system radio frequency transmitting channel, so that the storage of each radio frequency transmitting coil is convenient.

And the processing component is used for calibrating the radio frequency transmitting signals sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged.

The total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

Because each system radio frequency transmitting channel and each radio frequency coil transmitting channel have corresponding amplitude gain and phase, when different system radio frequency transmitting channels are connected with different radio frequency coil transmitting channels, the amplitude gain and the phase corresponding to the total radio frequency transmitting channel formed by the system radio frequency transmitting channels and the radio frequency coil transmitting channels which are mutually inserted are different, therefore, in order to realize the circular polarization of radio frequency transmission, the radio frequency transmitting signals transmitted by the total radio frequency transmitting channel need to be calibrated according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channels and the radio frequency coil transmitting channels which are mutually inserted.

Specifically, the nuclear magnetic resonance system may further include a storage component, and the storage component stores amplitude gains and phases corresponding to the radio frequency transmission channels of each system and the transmission channels of each radio frequency coil. The processing component can acquire the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged from the storage component, and then calibrate the radio frequency transmitting signal sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged.

The nuclear magnetic resonance system comprises a processing assembly, a plurality of system radio frequency transmitting channels and at least one radio frequency transmitting coil, wherein the radio frequency transmitting coil comprises at least one radio frequency coil transmitting channel; each system radio frequency transmitting channel can be plugged with any radio frequency coil transmitting channel and can be pulled out from the plugged radio frequency coil transmitting channel; the processing component is used for calibrating the radio frequency transmitting signals sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced. The radio frequency coil transmitting channel in the radio frequency transmitting coil in the nuclear magnetic resonance system and the system radio frequency transmitting channel are plugged in and pulled out, so that at least one radio frequency transmitting coil can be selected according to the condition of a patient and the actual requirement, and at least one radio frequency coil transmitting channel in the radio frequency transmitting coil is connected with the system radio frequency transmitting channel. Therefore, the flexibility of the nuclear magnetic resonance system is improved, the nuclear magnetic resonance scanning workflow is optimized, and the time is saved. In addition, a processing component in the nuclear magnetic resonance system calibrates the radio frequency transmitting signal sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged. Therefore, when a scanner is connected with the system radio frequency transmitting channel and the radio frequency coil transmitting channel according to the scanning requirement, the circular polarization of radio frequency transmission can be directly scanned and used, and the transmitting efficiency and the image quality are improved.

In an alternative embodiment of the present application, the processing component is specifically configured to: and calibrating the amplitude of the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the amplitude gain respectively corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted.

Specifically, the nuclear magnetic resonance system may further include a storage component, and the storage component stores amplitude gains and phases corresponding to the radio frequency transmission channels of each system and the transmission channels of each radio frequency coil. The processing component can obtain the amplitude gains respectively corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged from the storage component.

The processing component can calculate the amplitude of the radio frequency transmitting signal based on a first preset algorithm according to the amplitude requirement of a user on the target radio frequency transmitting signal and the amplitude gain corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually connected in an inserting mode, so that the target radio frequency transmitting signal is obtained. The first preset algorithm may include at least one of addition, subtraction, multiplication, division, square, evolution, and reciprocal calculation.

A processing component, specifically configured to: and calibrating the phase of the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the phases respectively corresponding to the mutually-inserted system radio frequency transmitting channel and the radio frequency coil transmitting channel.

Specifically, the nuclear magnetic resonance system may further include a storage component, and the storage component stores amplitude gains and phases corresponding to the radio frequency transmission channels of each system and the transmission channels of each radio frequency coil. The processing component can acquire the phases corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged from the storage component.

The processing component can calculate the phase of the radio frequency transmitting signal based on a second preset algorithm according to the phase requirement of a user on the target radio frequency transmitting signal and the phases corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually connected in an inserting mode, so that the target radio frequency transmitting signal is obtained. The second preset algorithm may include at least one of addition, subtraction, multiplication, division, square, evolution, and reciprocal calculation.

It should be noted that, in the embodiment of the present application, the processing component may first correct the amplitude of the radio frequency transmission signal, and then correct the phase of the radio frequency transmission signal; the processing component can also correct the phase of the radio frequency transmission signal firstly and then correct the amplitude of the radio frequency transmission signal; the processing component may also simultaneously correct the amplitude and phase of the rf transmitted signal. The order in which the processing component corrects the amplitude and phase of the rf transmit signal is not particularly limited in this application.

In an embodiment of the present application, the processing component is specifically configured to: calibrating the amplitude of a radio frequency transmitting signal transmitted by a total radio frequency transmitting channel according to the amplitude gain respectively corresponding to a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually inserted; and calibrating the phase of the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the phases respectively corresponding to the mutually-inserted system radio frequency transmitting channel and the radio frequency coil transmitting channel. Therefore, the circularly polarization of the radio frequency transmission can be realized by the radio frequency transmission signals after the amplitude calibration and the phase calibration, and the transmission efficiency and the image quality are improved.

In an optional embodiment of the present application, the total rf transmission channel includes a plurality of channels, and the processing component is specifically configured to: obtaining amplitude gain relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the amplitude of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the amplitude gain relation and the amplitude gain corresponding to each total radio frequency transmitting channel.

Specifically, under the condition that a plurality of radio frequency coil transmitting channels are connected with a plurality of system radio frequency transmitting channels to form a plurality of total radio frequency transmitting channels, in order to ensure that the quality of an image generated by using radio frequency transmitting signals transmitted by each total radio frequency transmitting channel is high, a user usually inputs the amplitude gain relationship among the radio frequency transmitting signals transmitted by the plurality of total radio frequency transmitting channels into the processing component according to the actual situation.

For example, the amplitude gain relationship between the rf transmit signals from the multiple total rf transmit channels may be: the amplitude gains of the radio frequency transmitting signals sent by the plurality of total radio frequency transmitting channels are consistent; the amplitude gain relationship between the rf transmit signals from the multiple total rf transmit channels may also be: the amplitude gain ratio between the total radio frequency transmission channel 1 and the total radio frequency transmission channel 2 is 1: 2. The amplitude gain relationship between the radio frequency transmission signals transmitted by the plurality of total radio frequency transmission channels is not specifically limited in the embodiments of the present application.

Specifically, after receiving amplitude gain relationships between radio frequency transmission signals transmitted by a plurality of total radio frequency transmission channels input by a user, the processing component may correct the radio frequency transmission signals transmitted by each total radio frequency transmission channel by using a third preset algorithm according to the amplitude gain relationships between the radio frequency transmission signals transmitted by the plurality of total radio frequency transmission channels and amplitude gains respectively corresponding to each total radio frequency transmission channel to obtain a plurality of target radio frequency transmission signals, and then generate a target image by using the plurality of target radio frequency transmission signals. The third preset algorithm may include at least one of addition, subtraction, multiplication, division, square, evolution, and reciprocal calculation.

Illustratively, the number of total radio frequency transmission channels is 2, and the total radio frequency transmission channel 1 is composed of a system radio frequency transmission channel 1 and a radio frequency coil transmission channel 1 in the radio frequency transmission coil a; the total radio frequency transmitting channel 2 is composed of a system radio frequency transmitting channel 2 and a radio frequency coil transmitting channel 2 in the radio frequency transmitting coil A. The amplitude gain corresponding to the system radio frequency transmitting channel 1 is C1, the amplitude gain corresponding to the radio frequency coil transmitting channel 1 in the radio frequency transmitting coil a is C2, and the amplitude gain corresponding to the total radio frequency transmitting channel 1 is C1 × C2; the amplitude gain corresponding to the system rf transmit channel 2 is E1, the amplitude gain corresponding to the rf coil transmit channel 2 in the rf transmit coil a is E2, and the amplitude gain corresponding to the total rf transmit channel 2 is E1 × E2.

Assuming that the amplitude gain relationship between the rf transmit signals from the multiple total rf transmit channels may be: the amplitude gain ratio between the total radio frequency transmit channels 1 and 2 is 1: 2.

The amplitude of the rf transmit signal from the total rf transmit channel 1 is multiplied by the inverse of C1 x C2, i.e. the amplitude is multiplied by the inverse of C2The amplitude of the rf transmit signal emitted by the total rf transmit channel 2 is multiplied by 2 times the inverse of E1 × E2, i.e. the amplitude is multiplied by the inverse of E2So that the amplitude gain ratio between the rf transmit signals from the total rf transmit channels 1 and 2 is 1: 2.

A processing component, specifically configured to: acquiring phase relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the phases of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels according to the phase relation and the phases corresponding to the total radio frequency transmitting channels respectively.

Specifically, under the condition that a plurality of radio frequency coil transmitting channels are connected with a system radio frequency transmitting channel to form a plurality of total radio frequency transmitting channels, in order to ensure that the quality of an image generated by using radio frequency transmitting signals transmitted by each total radio frequency transmitting channel is high, a user generally inputs the phase relationship among the radio frequency transmitting signals transmitted by the plurality of total radio frequency transmitting channels into the processing assembly according to the actual condition.

For example, the phase relationship between the rf transmission signals transmitted by the plurality of total rf transmission channels may be: the phases of the radio frequency transmitting signals transmitted by the plurality of total radio frequency transmitting channels are consistent; the phase relationship between the rf transmit signals from the plurality of total rf transmit channels may further be: the phase difference between the total rf transmit channel 1 and the total rf transmit channel 2 is 90 degrees. The phase relationship between the radio frequency transmission signals transmitted by the plurality of total radio frequency transmission channels is not particularly limited in the embodiments of the present application.

Specifically, after receiving the phase relationship between the radio frequency transmission signals transmitted by the plurality of total radio frequency transmission channels input by the user, the processing component may correct the radio frequency transmission signals transmitted by each total radio frequency transmission channel by using a fourth preset algorithm according to the phase relationship between the radio frequency transmission signals transmitted by the plurality of total radio frequency transmission channels and the phase corresponding to each total radio frequency transmission channel, so as to obtain a plurality of target radio frequency transmission signals, and then generate a target image by using the plurality of target radio frequency transmission signals. The fourth preset algorithm may include at least one of addition, subtraction, multiplication, division, square, evolution, and reciprocal calculation.

In an embodiment of the present application, the total rf transmission channel includes a plurality of channels, and the processing component is specifically configured to: obtaining amplitude gain relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the amplitude of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the amplitude gain relation and the amplitude gain corresponding to each total radio frequency transmitting channel. Acquiring phase relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the phases of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels according to the phase relation and the phases corresponding to the total radio frequency transmitting channels respectively. The processing component calibrates the amplitude and the phase of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels according to the amplitude gain and the phase respectively corresponding to the total radio frequency transmitting channels by acquiring the amplitude gain relationship and the phase relationship among the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels. Therefore, radio frequency transmitting signals transmitted by all the calibrated total radio frequency transmitting channels meet the requirements of users, and the circular polarization of radio frequency transmission is realized, so that the transmitting efficiency and the image quality are improved.

In an optional embodiment of the present application, the processing component is specifically configured to: and under the condition that the amplitude gain relationship is that the amplitude gains of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, multiplying the amplitude of each radio frequency transmitting signal by the corresponding amplitude calibration value.

The amplitude calibration value is the reciprocal of the product of the amplitude gains respectively corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted and corresponding to each total radio frequency transmitting channel.

Specifically, under the condition that the amplitude gain relationship is that the amplitude gains of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels are consistent, the processing component respectively obtains the amplitude gains respectively corresponding to the total radio frequency transmitting channels, wherein the amplitude gains respectively corresponding to the total radio frequency transmitting channels are the products of the amplitude gains respectively corresponding to the system radio frequency transmitting channels and the radio frequency coil transmitting channels which are mutually spliced and corresponding to the total radio frequency transmitting channels.

In order to ensure that the amplitudes of the rf transmission signals transmitted by the plurality of total rf transmission channels are consistent, the processing component may multiply the amplitude of the rf transmission signal transmitted by each total rf transmission channel by the corresponding amplitude calibration value.

Illustratively, the number of total radio frequency transmission channels is 2, and the total radio frequency transmission channel 1 is composed of a system radio frequency transmission channel 1 and a radio frequency coil transmission channel 1 in the radio frequency transmission coil a; the total radio frequency transmitting channel 2 is composed of a system radio frequency transmitting channel 2 and a radio frequency coil transmitting channel 2 in the radio frequency transmitting coil A. The amplitude gain corresponding to the system radio frequency transmitting channel 1 is C1, the amplitude gain corresponding to the radio frequency coil transmitting channel 1 in the radio frequency transmitting coil a is C2, and the amplitude gain corresponding to the total radio frequency transmitting channel 1 is C1 × C2; the amplitude gain corresponding to the system rf transmit channel 2 is E1, the amplitude gain corresponding to the rf coil transmit channel 2 in the rf transmit coil a is E2, and the amplitude gain corresponding to the total rf transmit channel 2 is E1 × E2.

Assuming that the amplitude gain relationship between the rf transmit signals from the multiple total rf transmit channels may be: the amplitude between the total radio frequency transmission channel 1 and the total radio frequency transmission channel 2 is consistent.

The total radio frequency transmission channel 1The amplitude of the transmitted rf transmit signal is multiplied by the inverse of C1 × C2, i.e.The amplitude of the rf transmit signal from the total rf transmit channel 2 is multiplied by the inverse of E1 × E2, i.e.So that the amplitudes of the radio frequency transmission signals emitted by the total radio frequency transmission channel 1 and the total radio frequency transmission channel 2 are consistent.

A processing component, specifically configured to: and under the condition that the phase relation is that the phases of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, subtracting the corresponding phase calibration value from the phase of each radio frequency transmitting signal, wherein the phase calibration value is the sum of the phases respectively corresponding to the mutually inserted system radio frequency transmitting channels and the radio frequency coil transmitting channels corresponding to all the total radio frequency transmitting channels.

Specifically, under the condition that the phase relationship is that the phases of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels are consistent, the processing component respectively obtains the phases corresponding to the total radio frequency transmitting channels, wherein the phases corresponding to the total radio frequency transmitting channels are the sum of the phases corresponding to the system radio frequency transmitting channels and the radio frequency coil transmitting channels which are connected with each other and correspond to the total radio frequency transmitting channels.

In order to ensure that the phases of the rf transmission signals transmitted by the multiple total rf transmission channels are consistent, the processing component may subtract the phase of the rf transmission signal transmitted by each total rf transmission channel from the corresponding phase calibration value.

Illustratively, the number of total radio frequency transmission channels is 2, and the total radio frequency transmission channel 1 is composed of a system radio frequency transmission channel 1 and a radio frequency coil transmission channel 1 in the radio frequency transmission coil a; the total radio frequency transmitting channel 2 is composed of a system radio frequency transmitting channel 2 and a radio frequency coil transmitting channel 2 in the radio frequency transmitting coil A. The phase corresponding to the system radio frequency transmitting channel 1 is D1, the phase corresponding to the radio frequency coil transmitting channel 1 in the radio frequency transmitting coil a is D2, and the phase corresponding to the total radio frequency transmitting channel 1 is D1+ D2; the phase corresponding to the system rf transmitting channel 2 is F1, and the phase corresponding to the rf coil transmitting channel 2 in the rf transmitting coil a is F2, so that the phase corresponding to the total rf transmitting channel 2 is F1+ F2.

Assuming that the phase relationship between the rf transmit signals from the multiple total rf transmit channels may be: the phases between the total radio frequency transmission channel 1 and the total radio frequency transmission channel 2 are identical.

The phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel 1 is subtracted by the sum of D1+ D2; the sum of F1+ F2 is subtracted from the phase of the rf transmit signal from overall rf transmit channel 2, so that the phases of the rf transmit signals from overall rf transmit channel 1 and overall rf transmit channel 2 coincide.

In this embodiment, when the amplitude gain relationship is that the amplitude gain and the phase of the rf transmission signal transmitted by each total rf transmission channel are consistent, the processing component multiplies the amplitude of each rf transmission signal by the corresponding amplitude calibration value, and subtracts the phase of each rf transmission signal from the corresponding phase calibration value. Therefore, the amplitude gain and the phase of the radio frequency transmitting signals transmitted by each total radio frequency transmitting channel are consistent, the radio frequency is corrected during scanning, the requirements of users are met, the circular polarization of radio frequency transmission is realized, and the transmitting efficiency and the image quality are improved.

In an optional embodiment of the present application, before the processing component calibrates the radio frequency transmission signal sent by the total radio frequency transmission channel according to the amplitude gain and the phase corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel that are plugged with each other, the processing component is further configured to:

and acquiring each total radio frequency transmitting channel generated after each radio frequency coil transmitting channel is connected with each system radio frequency transmitting channel.

In particular, each total radio frequency transmit channel may be generated after each radio frequency coil transmit channel is connected to each system radio frequency transmit channel. The processing component may record and store the total rf transmit channels after each rf coil transmit channel is connected to each system rf transmit channel.

And acquiring FID signals or/and images corresponding to the total radio frequency transmitting channels, and determining the amplitude and the phase corresponding to each FID signal or/and image.

In particular, the processing component may generate FID signals or/and images using the radio frequency transmit signals transmitted by each of the overall radio frequency transmit channels. The processing component determines the corresponding amplitude and phase of each FID signal or/and image based on a preset model or/and algorithm.

And inputting the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model to obtain the amplitude gain and the phase corresponding to each radio frequency coil transmitting channel and the amplitude gain and the phase corresponding to each system radio frequency transmitting channel.

Specifically, the processing component inputs the amplitude and phase corresponding to each FID signal or/and image into a preset algorithm model, where the preset algorithm model may be a model based on machine learning, an algorithm model generated based on various mathematical operations, or a model based on deep learning, such as a neural network model.

And the processing component inputs the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model to obtain the amplitude gain and the phase corresponding to each radio frequency coil transmitting channel and the amplitude gain and the phase corresponding to each system radio frequency transmitting channel.

The method is exemplified by an algorithm model which can be realized. Suppose that the nmr system includes 2 system rf transmission channels, namely a system rf transmission channel 1 and a system rf transmission channel 2, and one rf transmission coil, for example, where the rf transmission coil includes two rf coil transmission channels, namely an rf coil transmission channel 1 and an rf coil transmission channel 2. As shown in fig. 2.

Firstly, a system radio frequency transmitting channel 1 is connected with a radio frequency coil transmitting channel 1, and a system radio frequency transmitting channel 2 is connected with a radio frequency coil transmitting channel 2. And only adopting the system radio frequency emission channel 1 and the radio frequency coil emission channel 1 to carry out radio frequency emission and magnetic resonance scanning to obtain an FID signal or/and an image. Let the amplitude of the FID signal or/and image be a1 and the phase be P1. And only adopting the system radio frequency emission channel 2 and the radio frequency coil emission channel 2 to carry out radio frequency emission and magnetic resonance scanning to obtain an FID signal or/and an image. Let the amplitude of the FID signal or/and image be a2 and the phase be P2.

And secondly, connecting a system radio frequency transmitting channel 1 with a radio frequency coil transmitting channel 2, wherein the system radio frequency transmitting channel 2 is connected with the radio frequency coil transmitting channel 1. And only adopting a system radio frequency transmitting channel 1 and a radio frequency coil transmitting channel 2 to carry out radio frequency transmission and carry out magnetic resonance scanning to obtain an FID signal or/and an image. Let the amplitude of the FID signal or/and image be a3 and the phase be P3. And only adopting a system radio frequency transmitting channel 2 and a radio frequency coil transmitting channel 1 to carry out magnetic resonance scanning to obtain an FID signal or/and an image. Let the amplitude of the FID signal or image be a4 and the phase be P4.

Specifically, as shown in table 1:

setting the amplitude gain of a system radio frequency transmission channel 1 as C1 and the phase as D1; the amplitude gain of the system radio frequency transmission channel 2 is C2, and the phase is D2; the amplitude gain of the coil radio frequency transmission channel 1 is E1, and the phase is F1; the coil radio frequency transmit channel 2 has an amplitude gain of E2 and a phase of F2.

Specifically, as shown in table 2:

name (R)	Amplitude gain	Phase position
			System radio frequency transmission channel 1	C1	D1
System radio frequency transmission channel 2	C2	D2
			Coil radio frequency transmission channel 1	E1	F1
Coil radio frequency transmission channel 2	E2	F2

If the amplitude and phase of the radio frequency energy transmitted each time are consistent before entering the radio frequency transmitting channel after radio frequency amplification, the amplitude of the image or/and the FID signal is affected by the amplitude gain of the system radio frequency transmitting channel and the coil radio frequency transmitting channel, and the following results can be obtained:

by using (1) x (2), it is possible to obtainThus, it is possible to prevent the occurrence of,

by using (1)/(2), the same principle can be obtained

The phase of the image or/and FID signal is affected by the phases of the system rf transmit channel and the coil rf transmit channel, and can be:

P1-P2＝(D1+F1)-(D2+F2) (3)

P3-P4＝(D1+F2)-(D2+F1) (4)

using (3) + (4), 2 × (D1-D2) ═ P1-P2+ P3-P4 can be obtained, thereby

By using (3) to (4), the same can be obtained,

any one of the system radio frequency transmit channels and any one of the radio frequency transmit coil channels are referenced. In the embodiment of the present application, a system radio frequency transmission channel 1 and a radio frequency coil transmission channel 1 are used as references, and an amplitude correction value of the system radio frequency transmission channel 1 is 1, a phase correction value is 0, an amplitude correction value of the radio frequency coil transmission channel 1 is 1, and a phase correction value is 0. The amplitude correction value of the system radio frequency transmission channel 2 isThe phase correction value of the system radio frequency transmission channel 2 is (P1-P2+ P3-P4)/2. The amplitude correction value of the radio frequency coil transmitting channel 2 isThe phase correction value of the radio frequency coil transmission channel 2 is (P1-P2-P3+ P4)/2.

In an embodiment of the present application, the processing component is further configured to: acquiring each total radio frequency transmitting channel generated after each radio frequency coil transmitting channel is connected with each system radio frequency transmitting channel; acquiring FID signals or/and images corresponding to the total radio frequency transmitting channels, and determining the amplitude and the phase corresponding to the FID signals or/and images; and inputting the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model to obtain the amplitude gain and the phase corresponding to each radio frequency coil transmitting channel and the amplitude gain and the phase corresponding to each system radio frequency transmitting channel. Therefore, when the amplitude and the phase of the radio frequency transmitting signals transmitted by each main radio frequency transmitting channel are measured, no extra tool is needed, only the connection mode of the system radio frequency transmitting channel and the radio frequency coil transmitting channel is changed, the magnetic resonance signals under different connection modes are obtained through magnetic resonance scanning, and the correction values of the amplitude and the phase of each system radio frequency transmitting channel and each radio frequency coil transmitting channel can be calculated. This helps to reduce hardware costs for system calibration and maintenance and improves operational convenience.

Referring to fig. 3, an alternative embodiment of the present application provides a method for calibrating a radio frequency transmission signal, which is applied to the above-mentioned nuclear magnetic resonance system, and the method includes.

Step 301, the nuclear magnetic resonance system determines a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually inserted in a plurality of system radio frequency transmitting channels and a plurality of radio frequency coil transmitting channels which are included in the nuclear magnetic resonance system.

Step 302, the nuclear magnetic resonance system calibrates the radio frequency transmitting signal sent by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged.

The total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

In an alternative embodiment of the present application, as shown in fig. 4, the step 302 of "calibrating the rf transmission signal sent by the total rf transmission channel according to the amplitude gain and the phase corresponding to the system rf transmission channel and the rf coil transmission channel that are plugged into each other" may include the following steps:

step 401, the nuclear magnetic resonance system calibrates the amplitude of the radio frequency transmitting signal sent by the total radio frequency transmitting channel according to the amplitude gain corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged.

Step 402, the nuclear magnetic resonance system calibrates the phase of the radio frequency transmitting signal sent by the total radio frequency transmitting channel according to the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually plugged.

In an alternative embodiment of the present application, the total rf transmitting channel includes a plurality of total rf transmitting channels, and as shown in fig. 5, the step 401 of calibrating the amplitude of the rf transmitting signal sent by the total rf transmitting channel according to the amplitude gains corresponding to the system rf transmitting channel and the rf coil transmitting channel that are plugged into each other may include the following steps:

step 501, a nuclear magnetic resonance system obtains an amplitude gain relationship between radio frequency emission signals emitted by a plurality of total radio frequency emission channels.

Step 502, the nuclear magnetic resonance system calibrates the amplitude of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the amplitude gain relationship and the amplitude gain corresponding to each total radio frequency transmitting channel.

In an alternative embodiment of the present application, the total rf transmitting channel includes a plurality of total rf transmitting channels, and as shown in fig. 6, the step 402 of "calibrating the phase of the rf transmitting signal sent by the total rf transmitting channel according to the phases corresponding to the system rf transmitting channel and the rf coil transmitting channel that are plugged into each other" may include the following steps:

step 601, the nuclear magnetic resonance system obtains the phase relation among the radio frequency transmitting signals sent by a plurality of total radio frequency transmitting channels.

Step 602, the nmr system calibrates the phases of the rf emission signals sent by the total rf emission channels according to the phase relationship and the phases corresponding to the total rf emission channels.

In an optional embodiment of the present application, the step 502 of "calibrating the amplitude of the radio frequency transmission signal sent by each total radio frequency transmission channel according to the amplitude gain relationship and the amplitude gain corresponding to each total radio frequency transmission channel" may include the following steps:

and under the condition that the amplitude gain relationship is that the amplitude gains of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels are consistent, multiplying the amplitude of each radio frequency transmitting signal by a corresponding amplitude calibration value, wherein the amplitude calibration value is the reciprocal of the product of the amplitude gains respectively corresponding to the mutually-spliced system radio frequency transmitting channels and the radio frequency coil transmitting channels corresponding to the total radio frequency transmitting channels.

In an optional embodiment of the present application, the step 602 of "calibrating the phase of the radio frequency transmission signal sent by each total radio frequency transmission channel according to the phase relationship and the phase corresponding to each total radio frequency transmission channel" may include the following steps:

and under the condition that the phase relation is that the phases of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, subtracting the corresponding phase calibration value from the phase of each radio frequency transmitting signal, wherein the phase calibration value is the sum of the phases respectively corresponding to the mutually inserted system radio frequency transmitting channels and the radio frequency coil transmitting channels corresponding to all the total radio frequency transmitting channels.

In an alternative embodiment of the present application, as shown in fig. 7, before "calibrating the rf transmit signal sent by the total rf transmit channel according to the amplitude gain and the phase corresponding to the system rf transmit channel and the rf coil transmit channel that are plugged into each other" in step 202, the method for calibrating the rf transmit signal may further include the following steps:

and 701, the nuclear magnetic resonance system acquires all radio frequency coil transmitting channels and generates all total radio frequency transmitting channels after the radio frequency coil transmitting channels are connected with all system radio frequency transmitting channels.

Step 702, the nuclear magnetic resonance system acquires FID signals or/and images corresponding to the total radio frequency emission channels, and determines the corresponding amplitude and phase of each FID signal or/and image.

And 703, inputting the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model by the nuclear magnetic resonance system to obtain the amplitude gain and the phase corresponding to each radio-frequency coil transmitting channel and the amplitude gain and the phase corresponding to each system radio-frequency transmitting channel.

For specific limitations of the rf emission signal calibration method, reference may be made to the above limitations of the nmr system, which are not described herein again. The radio frequency emission signal correction method is related to the nuclear magnetic resonance system provided by the above embodiments, and therefore, the radio frequency emission signal correction method has all the beneficial effects of the nuclear magnetic resonance system, and is not described herein again.

It should be understood that although the various steps in the flow charts of fig. 3-7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 3-7 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.

In one embodiment of the present application, as shown in fig. 8, there is provided a radio frequency transmission signal correction apparatus 8000, including: a determination module 8010 and a calibration module 8020, wherein:

a determining module 8010, configured to determine, in a plurality of system radio frequency transmitting channels and a plurality of radio frequency coil transmitting channels included in the nuclear magnetic resonance system, the system radio frequency transmitting channels and the radio frequency coil transmitting channels that are plugged into each other;

the calibration module 8020 is configured to calibrate the radio frequency transmission signal sent by the total radio frequency transmission channel according to the amplitude gain and the phase corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel that are plugged with each other; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

In an embodiment of the present application, as shown in fig. 9, the calibration module 8020 includes an amplitude calibration unit 8021 and a phase calibration unit 8022, where:

the amplitude calibration unit 8021 is configured to calibrate the amplitude of the radio frequency transmission signal sent by the total radio frequency transmission channel according to the amplitude gains respectively corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel that are plugged with each other.

The phase calibration unit 8022 is configured to calibrate a phase of a radio frequency transmission signal sent by the total radio frequency transmission channel according to phases respectively corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel that are plugged with each other.

In an embodiment of the present application, the total rf transmission channels include a plurality of total rf transmission channels, where the amplitude calibration unit 8021 is specifically configured to obtain an amplitude gain relationship between rf transmission signals sent by the plurality of total rf transmission channels; and calibrating the amplitude of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the amplitude gain relation and the amplitude gain corresponding to each total radio frequency transmitting channel.

In an embodiment of the present application, the total rf transmission channels include a plurality of total rf transmission channels, and the phase calibration unit 8022 is specifically configured to obtain phase relationships between rf transmission signals sent by the plurality of total rf transmission channels; and calibrating the phases of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels according to the phase relation and the phases corresponding to the total radio frequency transmitting channels respectively.

In an embodiment of the present application, the amplitude calibration unit 8021, when the amplitude gain relationship is that the amplitude gains of the rf transmitting signals transmitted by the total rf transmitting channels are consistent, multiplies the amplitude of each rf transmitting signal by a corresponding amplitude calibration value, where the amplitude calibration value is a reciprocal of a product of the amplitude gains respectively corresponding to the system rf transmitting channels and the rf coil transmitting channels, which are plugged into each other, corresponding to each total rf transmitting channel.

In an embodiment of the present application, the phase calibration unit 8022 subtracts a corresponding phase calibration value from the phase of each rf transmitting signal when the phase relationship is that the phases of the rf transmitting signals transmitted by the total rf transmitting channels are consistent, where the phase calibration value is a sum of corresponding phases of the system rf transmitting channel and the rf coil transmitting channel that are plugged into each other and correspond to each total rf transmitting channel.

In an embodiment of the present application, as shown in fig. 10, the rf transmission signal calibration apparatus 8000 further includes:

the first obtaining module 8030 is configured to obtain each total radio frequency transmission channel generated after each radio frequency coil transmission channel is connected to each system radio frequency transmission channel.

The second obtaining module 8040 is configured to obtain an FID signal or/and an image corresponding to each total radio frequency transmission channel, and determine an amplitude and a phase corresponding to each FID signal or/and image.

The input module 8050 is configured to input the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model, so as to obtain the amplitude gain and the phase corresponding to each rf coil transmitting channel and the amplitude gain and the phase corresponding to each system rf transmitting channel.

For specific limitations of the rf transmission signal calibration apparatus, reference may be made to the above limitations of the rf transmission signal calibration method, which are not described herein again. The modules in the radio frequency transmission signal correcting device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a medical device is provided, which may be a server, the internal structure of which may be as shown in fig. 11. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing the radio frequency transmission signal correction data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a radio frequency transmit signal correction method.

In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 12. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a radio frequency transmit signal correction method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.

Those skilled in the art will appreciate that the configurations shown in fig. 11 and 12 are merely block diagrams of portions of configurations related to aspects of the present application, and do not constitute limitations on the computing devices to which aspects of the present application may be applied, as particular computing devices may include more or less components than shown, or combine certain components, or have a different arrangement of components.

In one embodiment, a medical apparatus is provided, which includes a memory and a processor, the memory stores a computer program, the medical apparatus includes a medical apparatus body, a nuclear magnetic resonance system and a scanning bed, the processor executes the computer program to realize the following steps: calibrating the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

In one embodiment, the processor, when executing the computer program, further performs the steps of: calibrating the amplitude of a radio frequency transmitting signal transmitted by a total radio frequency transmitting channel according to the amplitude gain respectively corresponding to a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually inserted; and calibrating the phase of the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the phases respectively corresponding to the mutually-inserted system radio frequency transmitting channel and the radio frequency coil transmitting channel.

In one embodiment, the total rf transmit channel comprises a plurality of channels, and the processor when executing the computer program further performs the steps of: obtaining amplitude gain relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the amplitude of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the amplitude gain relation and the amplitude gain corresponding to each total radio frequency transmitting channel.

In one embodiment, the total rf transmit channel comprises a plurality of channels, and the processor when executing the computer program further performs the steps of: acquiring phase relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the phases of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels according to the phase relation and the phases corresponding to the total radio frequency transmitting channels respectively.

In one embodiment, the processor, when executing the computer program, further performs the steps of: and under the condition that the amplitude gain relationship is that the amplitude gains of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels are consistent, multiplying the amplitude of each radio frequency transmitting signal by a corresponding amplitude calibration value, wherein the amplitude calibration value is the reciprocal of the product of the amplitude gains respectively corresponding to the mutually-spliced system radio frequency transmitting channels and the radio frequency coil transmitting channels corresponding to the total radio frequency transmitting channels.

In one embodiment, the processor, when executing the computer program, further performs the steps of: a processing component, specifically configured to: and under the condition that the phase relation is that the phases of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, subtracting the corresponding phase calibration value from the phase of each radio frequency transmitting signal, wherein the phase calibration value is the sum of the phases respectively corresponding to the mutually inserted system radio frequency transmitting channels and the radio frequency coil transmitting channels corresponding to all the total radio frequency transmitting channels.

In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring each total radio frequency transmitting channel generated after each radio frequency coil transmitting channel is connected with each system radio frequency transmitting channel; acquiring FID signals or/and images corresponding to the total radio frequency transmitting channels, and determining the amplitude and the phase corresponding to the FID signals or/and images; and inputting the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model to obtain the amplitude gain and the phase corresponding to each radio frequency coil transmitting channel and the amplitude gain and the phase corresponding to each system radio frequency transmitting channel.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of: calibrating the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the amplitude gain and the phase corresponding to the system radio frequency transmitting channel and the radio frequency coil transmitting channel which are mutually inserted; the total radio frequency transmitting channel consists of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually spliced.

In one embodiment, the computer program when executed by the processor further performs the steps of: calibrating the amplitude of a radio frequency transmitting signal transmitted by a total radio frequency transmitting channel according to the amplitude gain respectively corresponding to a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually inserted; and calibrating the phase of the radio frequency transmitting signal transmitted by the total radio frequency transmitting channel according to the phases respectively corresponding to the mutually-inserted system radio frequency transmitting channel and the radio frequency coil transmitting channel.

In one embodiment, the total radio frequency transmit channel comprises a plurality, and the computer program when executed by the processor further performs the steps of: obtaining amplitude gain relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the amplitude of the radio frequency transmitting signal transmitted by each total radio frequency transmitting channel according to the amplitude gain relation and the amplitude gain corresponding to each total radio frequency transmitting channel.

In one embodiment, the total radio frequency transmit channel comprises a plurality, and the computer program when executed by the processor further performs the steps of: acquiring phase relations among radio frequency transmitting signals transmitted by a plurality of total radio frequency transmitting channels; and calibrating the phases of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels according to the phase relation and the phases corresponding to the total radio frequency transmitting channels respectively.

In one embodiment, the computer program when executed by the processor further performs the steps of: and under the condition that the amplitude gain relationship is that the amplitude gains of the radio frequency transmitting signals transmitted by the total radio frequency transmitting channels are consistent, multiplying the amplitude of each radio frequency transmitting signal by a corresponding amplitude calibration value, wherein the amplitude calibration value is the reciprocal of the product of the amplitude gains respectively corresponding to the mutually-spliced system radio frequency transmitting channels and the radio frequency coil transmitting channels corresponding to the total radio frequency transmitting channels.

In one embodiment, the computer program when executed by the processor further performs the steps of: a processing component, specifically configured to: and under the condition that the phase relation is that the phases of the radio frequency transmitting signals transmitted by all the total radio frequency transmitting channels are consistent, subtracting the corresponding phase calibration value from the phase of each radio frequency transmitting signal, wherein the phase calibration value is the sum of the phases respectively corresponding to the mutually inserted system radio frequency transmitting channels and the radio frequency coil transmitting channels corresponding to all the total radio frequency transmitting channels.

In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring each total radio frequency transmitting channel generated after each radio frequency coil transmitting channel is connected with each system radio frequency transmitting channel; acquiring FID signals or/and images corresponding to the total radio frequency transmitting channels, and determining the amplitude and the phase corresponding to the FID signals or/and images; and inputting the amplitude and the phase corresponding to each FID signal or/and image into a preset algorithm model to obtain the amplitude gain and the phase corresponding to each radio frequency coil transmitting channel and the amplitude gain and the phase corresponding to each system radio frequency transmitting channel.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.