阅读说明：本技术 放射线剂量的确定方法及装置 (Method and device for determining radiation dose ) 是由 逄岭 屠志鹏 于 2021-09-10 设计创作，主要内容包括：本发明公开了一种放射线剂量的确定方法及装置,涉及数据处理技术领域,包括：获取与目标区域匹配的对比噪声比,所述对比噪声比为基于所述目标区域的平片扫描图像数据的参考电流值确定的；确定待执行扫描的形状过滤器的形状信息与电压值,并结合所述对比噪声比获得与所述形状信息、所述电压值匹配的扫描电流值；基于所述扫描电流值确定放射线剂量值,并从所述放射线剂量值中筛选出所述目标区域的放射线剂量,实现放射线剂量的精准确定。(The invention discloses a method and a device for determining radiation dose, which relate to the technical field of data processing and comprise the following steps: acquiring a contrast-to-noise ratio matched with a target region, wherein the contrast-to-noise ratio is determined based on a reference current value of plain film scanning image data of the target region; determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio; and determining a radiation dose value based on the scanning current value, and screening out the radiation dose of the target area from the radiation dose value to realize accurate determination of the radiation dose.)

1. A method for determining a radiation dose, comprising:

acquiring a contrast-to-noise ratio matched with a target region, wherein the contrast-to-noise ratio is determined based on a reference current value of plain film scanning image data of the target region;

determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio;

and determining a radiation dose value based on the scanning current value, and screening out the radiation dose of the target area from the radiation dose value.

2. The method of claim 1, wherein prior to said obtaining a contrast to noise ratio matching a target region, the method further comprises:

starting the plain film scanning operation of all the areas and collecting plain film scanning image data;

and calculating a reference current value based on the plain film scanning image data and the equivalent liquid model diameter corresponding to the whole area, wherein the equivalent liquid model diameter is equivalent shape and size information between the whole area and preset liquid.

3. The method of claim 2, wherein said calculating a reference current value based on said flat-scan image data and equivalent liquid-mode diameters corresponding to said total area comprises:

selecting a scanning protocol, and determining a preset diameter and a preset current value which are matched with the scanning protocol;

calculating equivalent liquid mode diameters of all the regions based on each slice of the plain film scanning image data, and calculating reference current values matched with the preset diameters, the preset current values and the equivalent liquid mode diameters by using a preset current calculation function.

4. The method of claim 2, wherein said obtaining a contrast to noise ratio matching a target region comprises:

and determining the reference current value and the equivalent liquid mode diameter of the target area as scanning conditions, and determining the contrast-to-noise ratio generated by scanning under the scanning conditions.

5. The method of claim 1, wherein determining shape information and voltage values for a shape filter for which a scan is to be performed comprises:

and acquiring all shape information and all voltage values of the shape filter, and performing combined pairing on the shape information and the voltage values to obtain a combined pair of the shape information and the voltage values to be scanned, so as to calculate scanning current values corresponding to the shape information and the voltage values of different combined pairs.

6. The method of claim 5, wherein after determining a radiation dose value based on the scan current value and screening the radiation dose of the target region from the radiation dose value, the method further comprises:

and generating scanning conditions to be scanned according to the radiation dose and the shape information, the voltage value and the current value matched with the radiation dose, and storing the scanning conditions.

7. The method of claim 6, further comprising:

and responding to a scanning execution instruction of the target area, and configuring the scanning condition in an execution parameter corresponding to a scanning operation.

8. A radiation dose determination apparatus, characterized by comprising:

the acquisition module is used for acquiring a contrast-to-noise ratio matched with a target region, wherein the contrast-to-noise ratio is determined based on a reference current value of plain film scanning image data of the target region;

the first determination module is used for determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio;

and the second determination module is used for determining a radiation dose value based on the scanning current value and screening out the radiation dose of the target area from the radiation dose value.

9. A storage medium having stored therein at least one executable instruction that causes a processor to execute an operation corresponding to the radiation dose determination method according to any one of claims 1 to 7.

10. A terminal, comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;

the memory is used for storing at least one executable instruction, and the executable instruction causes the processor to execute the operation corresponding to the radiation dose determination method according to any one of claims 1-7.

Technical Field

The present invention relates to the field of data processing technologies, and in particular, to a method and an apparatus for determining a radiation dose.

Background

With the continuous development of medical technology, ct (computed tomography), i.e. computed tomography, has been widely used in clinical medical scanning and detection due to its advantages of fast scanning time, clear imaging, etc. Since the X-rays emitted by the CT machine generate radiation during the scanning process of the human body, the negative effect on the human body needs to be reduced by modulating the minimum dose of the X-rays under the condition of satisfying the image quality.

Currently, CT scanning is performed in combination with a shape filter by setting a fixed CTDI value as a scanning condition under the limitation of a Dose absorption distribution under the condition that a CNR (Contrast to Noise Ratio) is generally used as an evaluation criterion of image quality, a CTDI (Computed Tomography Dose Index) is used as a measure of Dose, and a fixed CTDI value is set as a scanning condition under the limitation of a Dose absorption distribution under the condition that the CNR is ensured to be constant. However, the fixed CTDI value cannot satisfy different dose modulation requirements of different scanning regions, so that the CT image is not clear enough or causes slight negative effect of X-ray radiation, and therefore, a method for determining CT dose is needed to solve the above problems.

Disclosure of Invention

In view of the above, the present invention provides a method and an apparatus for determining a radiation dose, and mainly aims to solve the problem that the existing radiation dose value is not determined accurately.

According to an aspect of the present invention, there is provided a radiation dose determination method including:

acquiring a contrast-to-noise ratio matched with a target region, wherein the contrast-to-noise ratio is determined based on a reference current value of plain film scanning image data of the target region;

determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio;

and determining a radiation dose value based on the scanning current value, and screening out the radiation dose of the target area from the radiation dose value.

Further, before the obtaining of the contrast-to-noise ratio matching with the target region, the method further includes:

starting the plain film scanning operation of all the areas and collecting plain film scanning image data;

and calculating a reference current value based on the plain film scanning image data and the equivalent liquid model diameter corresponding to the whole area, wherein the equivalent liquid model diameter is equivalent shape and size information between the whole area and preset liquid.

Further, the calculating a reference current value based on the plain scan image data and the equivalent liquid mode diameters corresponding to the entire region includes:

selecting a scanning protocol, and determining a preset diameter and a preset current value which are matched with the scanning protocol;

calculating equivalent liquid mode diameters of all the regions based on each slice of the plain film scanning image data, and calculating reference current values matched with the preset diameters, the preset current values and the equivalent liquid mode diameters by using a preset current calculation function.

Further, the obtaining a contrast-to-noise ratio matching the target region includes:

and determining the reference current value and the equivalent liquid mode diameter of the target area as scanning conditions, and determining the contrast-to-noise ratio generated by scanning under the scanning conditions.

Further, the determining the shape information and the voltage value of the shape filter on which the scan is to be performed includes:

and acquiring all shape information and all voltage values of the shape filter, and performing combined pairing on the shape information and the voltage values to obtain a combined pair of the shape information and the voltage values to be scanned, so as to calculate scanning current values corresponding to the shape information and the voltage values of different combined pairs.

Further, after determining a radiation dose value based on the scan current value and screening out a radiation dose of the target region from the radiation dose value, the method further includes:

and generating scanning conditions to be scanned according to the radiation dose and the shape information, the voltage value and the current value matched with the radiation dose, and storing the scanning conditions.

Further, the method further comprises:

and responding to a scanning execution instruction of the target area, and configuring the scanning condition in an execution parameter corresponding to a scanning operation.

According to another aspect of the present invention, there is provided a radiation dose determination apparatus including:

the acquisition module is used for acquiring a contrast-to-noise ratio matched with a target region, wherein the contrast-to-noise ratio is determined based on a reference current value of plain film scanning image data of the target region;

the first determination module is used for determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio;

and the second determination module is used for determining a radiation dose value based on the scanning current value and screening out the radiation dose of the target area from the radiation dose value.

Further, the apparatus further comprises:

the starting module is used for starting the plain film scanning operation of all the areas and collecting plain film scanning image data;

and the calculating module is used for calculating a reference current value based on the plain film scanning image data and the equivalent liquid model diameter corresponding to the whole area, wherein the equivalent liquid model diameter is equivalent shape and size information between the whole area and preset liquid.

Further, the calculation module includes:

the device comprises a first determining unit, a second determining unit and a control unit, wherein the first determining unit is used for selecting a scanning protocol and determining a preset diameter and a preset current value which are matched with the scanning protocol;

and the calculating unit is used for calculating the equivalent liquid mode diameter of all the areas based on each slice of the plain film scanning image data, and calculating a reference current value matched with the preset diameter, the preset current value and the equivalent liquid mode diameter by a preset current calculating function.

Further, the air conditioner is provided with a fan,

the obtaining module is specifically configured to determine the reference current value and the equivalent liquid mode diameter of the target region as a scanning condition, and determine a contrast-to-noise ratio generated by scanning under the scanning condition.

Further, the air conditioner is provided with a fan,

the first determining module is specifically configured to obtain all shape information and all voltage values of the shape filter, perform combination pairing on the shape information and the voltage values, obtain a combination pair of the shape information and the voltage values to be scanned, and calculate a scanning current value corresponding to the shape information and the voltage values of different combination pairs.

Further, the apparatus further comprises:

and the generating module is used for generating scanning conditions to be scanned according to the radiation dose and the shape information, the voltage value and the current value matched with the radiation dose, and storing the scanning conditions.

Further, the apparatus further comprises:

the configuration module is used for responding to a scanning execution instruction of the target area and configuring the scanning condition into an execution parameter corresponding to scanning operation;

according to still another aspect of the present invention, there is provided a storage medium having stored therein at least one executable instruction that causes a processor to perform operations corresponding to the above-described radiation dose determination method.

According to still another aspect of the present invention, there is provided a terminal including: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;

the memory is used for storing at least one executable instruction, and the executable instruction enables the processor to execute the operation corresponding to the radiation dose determination method.

By the technical scheme, the technical scheme provided by the embodiment of the invention at least has the following advantages:

compared with the prior art, the method and the device for determining the radiation dose have the advantages that the contrast-to-noise ratio matched with the target area is obtained, and is determined based on the reference current value of the plain film scanning image data of the target area; determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio; the radiation dose value is determined based on the scanning current value, and the radiation dose of the target area is screened out from the radiation dose value, so that the adaptability and the automation of the modulation of the radiation dose are realized, the error of artificial modulation is avoided, the requirements of different scanning areas for modulating different radiation doses are met, and the accuracy and the efficiency of the radiation dose determination are greatly improved.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a flowchart illustrating a method for determining a radiation dose according to an embodiment of the present invention;

FIG. 2 is a flow chart of another radiation dose determination method provided by an embodiment of the present invention;

FIG. 3 illustrates a slice schematic of a flatbed scan image provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating a radiation dose calculation process according to an embodiment of the present invention;

fig. 5 is a block diagram illustrating a radiation dose determining apparatus according to an embodiment of the present invention;

fig. 6 shows a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

An embodiment of the present invention provides a method for determining a radiation dose, as shown in fig. 1, the method including:

101. and acquiring the contrast-to-noise ratio matched with the target area.

In the embodiment of the present invention, in order to accurately obtain optimal radiation doses under different shape filters and voltage conditions, so as to adaptively determine radiation doses for different portions in a CT scanning process, a processor serving as a current execution end may be a server connected to a CT scanning device, or may be a terminal, a cloud, and the like that perform data processing independently, and the embodiment of the present invention is not particularly limited. Wherein when it is determined that the radiation dose is to be determined, the contrast-to-noise ratio of the target region matching is acquired. The target region may be a partial region of the object to be scanned, for example, the target region may be a head of a human body, a chest of a human body, or the like, and the contrast-to-noise ratio is determined based on a reference current value of the plain scan image data of the target region. Specifically, a reference current value needs to be determined, that is, a reference current value is calculated based on scanned image data obtained by scanning a human body by flat-sheet scanning, so as to determine a contrast-to-noise ratio according to the reference current value in combination with a calculation formula, a shape filter, a voltage value, and the like, which is not specifically limited in the embodiment of the present invention.

It should be noted that the plain film scan in the embodiment of the present invention is set to scan the whole corresponding to the target region under the condition of a given minute radiation dose and a preset shape filter and voltage, for example, under the condition of a large shape filter and 120kV, perform a planar scan on the human body to acquire plain film image data. In addition, in the embodiment of the invention, the CT value change rule and the change rule of the noise along with the equivalent liquid mode diameter can be directly calculated based on the corresponding coefficients of the voltage, the shape filter and the noise gear in the CT scanning equipment, so that the contrast-to-noise ratio is calculated based on the CT value change rule and the noise change rule.

102. And determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio.

In the embodiment of the present invention, after the contrast-to-noise ratio is determined, in order to adapt to different voltage and shape filters for a target region, shape information of the shape filter to be scanned and a corresponding voltage value need to be determined, so as to calculate a scanning current value matching the shape information and the voltage value by combining the contrast-to-noise ratio. Wherein the shape information of the shape filter is used to represent information of different shapes, e.g. large, medium and small shapes of the shape filter, the voltage includes but is not limited to voltage values of 60kV-140kV, such as 60kV, 70kV, 80kV, 100kV, 120kV, 140 kV. Meanwhile, the shape information and the voltage information may be paired in any permutation and combination manner to calculate a plurality of scanning current values, which is not specifically limited in the embodiment of the present invention.

It should be noted that, in the embodiment of the present invention, after the shape information and the voltage value are determined, the shape information and the scan current value matched with the voltage value of each combination pair are calculated by combining the contrast to noise ratio, and specifically, the shape information and the scan current value matched with the voltage value of each combination pair may be calculated based on the formula (1):

wherein DoseRight factor is the coefficient corresponding to the noise level, CNR is the contrast-to-noise ratio, mAs_refFor set current values recorded in the scanning protocol, D_refFor equivalent liquid mode diameter, D, recorded in the scanning protocol_scanIs an equivalent liquid mode diameter, preferably an equivalent water mode diameter, mu, obtained by calculation according to the plain film image data_waterFor the decay coefficient of water, adjCoef is an exponential adjustment parameter for the reference current value.

103. And determining a radiation dose value based on the scanning current value, and screening out the radiation dose of the target area from the radiation dose value.

In the embodiment of the present invention, since a plurality of scan current values can be calculated by pairing the shape information and the voltage value in different combinations in step 102, and a plurality of radiation dose values are calculated in the same manner, in order to select an optimal radiation dose, the plurality of calculated radiation dose values are sorted, and the minimum value is selected as the radiation dose of the target region, and at this time, the radiation dose is optimal as the scan condition. For the calculation of the radiation dose value, the CTDI value may be calculated based on statistics of different voltages, currents, slice thicknesses, rotation speeds, and shape information of the shape filter, and in the application process, the CTDI value may be obtained by searching data in a pre-stored table and performing interpolation, which is not specifically limited in the embodiment of the present invention.

It should be noted that, in the process of calculating the radiation dose value determined based on the scan current value, the difference from the calculation of the reference current value is only that the reference current value is not based on the contrast-to-noise ratio as a calculation parameter, and therefore, in the calculation of the scan current value, in order to ensure that the contrast-to-noise ratio is consistent, the shape filter and the voltage combination with the minimum radiation dose are automatically selected, that is, in the calculation of the radiation dose value based on the scan current value calculated based on the contrast-to-noise ratio, it is necessary to calculate radiation dose values corresponding to combinations of a plurality of sets of voltage values and shape information of the shape filter, respectively, and thus the minimum radiation dose value can be selected as the optimum radiation dose from a plurality of radiation dose values.

For further definition and illustration, in an embodiment of the present invention, as shown in fig. 2, before the step 101 of obtaining a contrast to noise ratio matching with the target region, the method further includes: 201. starting the plain film scanning operation of all the areas and collecting plain film scanning image data; 202. calculating a reference current value based on the plain film scan image data and the equivalent liquid mode diameters corresponding to the entire regions.

Because the plain film image data is obtained by scanning in a reciprocating manner along the direction of the scanning bed, the plain film scanning operation on all areas is started according to the moving direction of the scanning bed, the plain film scanning image data is collected to be decomposed into a plurality of slices with the same width, and all the areas can be all body parts of a human body. Meanwhile, in order to calculate the reference current value of the scanning device based on the scanning protocol, the reference current value is calculated by combining the collected plain film scanning image data and the equivalent liquid mode diameter corresponding to the whole area. In the embodiment of the present invention, since the property of the human body is closest to that of water, the equivalent liquid mode diameter is preferably the equivalent water mode diameter, and if there is a liquid closer to the property of the human body, the liquid mode diameter may be replaced by a corresponding liquid mode diameter without specific limitation.

Specifically, as shown in fig. 3, the effective attenuation area corresponding to each slice can be calculated based on the decomposition of the plain film scan image data into a plurality of slices with the same width, the effective attenuation area is obtained according to the attenuation integral of the corresponding length range of the slice, the shaded area is the equivalent attenuation area corresponding to the slice, and the area S is defined as formula (2):

wherein, N: is the number of channels, mu_i: is the average attenuation coefficient of the target area to be scanned on the ith channel_i: for the path of the ray passing through the target area to be scanned on the ith channel, Δ: distance between adjacent detectors, R: radius of rotation, α: fan angle of the detector.

In an embodiment of the present invention, for further limitation and description, the step 202 of calculating a reference current value based on the flatbed scanning image data and the equivalent liquid mode diameters corresponding to all the regions specifically includes: selecting a scanning protocol, and determining a preset diameter and a preset current value which are matched with the scanning protocol; calculating equivalent liquid mode diameters of all the regions based on each slice of the plain film scanning image data, and calculating reference current values matched with the preset diameters, the preset current values and the equivalent liquid mode diameters by using a preset current calculation function.

Since human tissue is most similar to water in nature, in order to realize the calculation of the reference current value as the determination of the contrast-to-noise ratio, the scanning protocol of the scanning device is first determined to perform the reference current value based on the diameter and current value pre-configured in the scanning protocol. After the equivalent liquid mode diameter is calculated through the effective attenuation area, the equivalent liquid mode diameter can be determined as size information corresponding to a scanned target area to be equivalent to a cylinder, after a scanning protocol is selected, a preset diameter and a preset current value which are configured in the scanning protocol in advance are read, and a reference current value is calculated according to the preset diameter and the preset current value and the equivalent liquid mode diameter obtained by each slice.

In the scene of the water model diameter, the formula (3) for calculating the equivalent water model diameter is as follows:

D_scan＝2*sqrt(mean(S)/(PI*μ_water)) (3)

wherein D is_scan: calculating the equivalent water mode diameter, mu, according to the plain film image data_water: the attenuation coefficient of water, S is the effective attenuation area, PI is PI, and can be 3.1415926. After the equivalent water model diameter is calculated, the calculation formula (4) for calculating the reference current value is:

wherein mAs_ACSAs a reference current value, D_refFor preset equivalent water model diameter, mAs in scanning protocol_refThe value of current preset in scanning protocol, adjCoef is index adjustment parameter of reference current value, DoseRight factor is coefficient corresponding to noise gear of scanning equipment.

In an embodiment of the present invention, for further definition and explanation, the step 101 of obtaining a contrast-to-noise ratio matched with the target region specifically includes: and determining the reference current value and the equivalent liquid mode diameter of the target area as scanning conditions, and determining the contrast-to-noise ratio generated by scanning under the scanning conditions.

In order to accurately calculate the contrast-to-noise ratio, and thus to calculate the scanning current based on the contrast-to-noise ratio, a reference current value and an equivalent water mode diameter of the target region are first determined as the scanning condition, so that the contrast-to-noise ratio generated by scanning under the scanning condition is determined. Because the scanning equipment needs to scan according to the scanning conditions, the change rule of CT values of different materials under the scanning of each voltage and shape filter and the rule that noise changes along with the diameter of the equivalent water model under the same dosage can be obtained so as to determine the contrast-to-noise ratio. Specifically, when the scanning device scans according to the scanning condition, the shape information and the voltage value of each shape filter which can be expected to be scanned are taken as the variation voltage and the shape information of the scanning device. Therefore, the formula (5) for calculating the contrast-to-noise ratio CNR value further from the CT value and the noise value of the image obtained by passing the X-ray through the target region corresponding to the equivalent water-model diameter is:

wherein, CT () is a change rule of each voltage value and shape information of the shape filter corresponding to CT values of different materials, wherein the reference material is set as water, Noise () is a change rule of Noise along with the diameter when each voltage value and shape information of the shape filter correspond to the same dose, wedge is the shape information of the shape filter, and D is an equivalent water model diameter of a target region to be scanned, thereby determining a contrast to Noise ratio CNR based on the ratio.

In an embodiment of the present invention, for further limitation and description, the step 102 of determining the shape information and the voltage value of the shape filter to be scanned specifically includes: and acquiring all shape information and all voltage values of the shape filter, and performing combined pairing on the shape information and the voltage values to obtain a combined pair of the shape information and the voltage values to be scanned, so as to calculate scanning current values corresponding to the shape information and the voltage values of different combined pairs.

Since different shape filters and voltage values have great influence on the current value of the scanning device, in order to accurately obtain and calculate the scanning current value which can be scanned as a target area, firstly, all shape information and voltage values which are expected to be scanned are obtained, and are arranged and combined in a combination pairing mode to obtain a plurality of combination pairs, so as to calculate the scanning current value corresponding to the shape information and the voltage value of each combination pair. The shape information of the shape filter includes but is not limited to a large shape filter, a medium shape filter and a small shape filter, the voltage values include but are not limited to 60kV, 70kV, 80kV, 100kV, 120kV and 140kV, and then the shape filter is arranged and combined, and the combination mode is not limited to that the voltage values and the shape information are individually corresponding.

It should be noted that, in the embodiment of the present invention, since the reference current value is calculated under the effective attenuation area and the equivalent liquid mode area of the plain film image data, the contrast to noise ratio CNR is not taken as a calculation parameter, but the contrast to noise ratio CNR is calculated after the reference current value is calculated, so that the contrast to noise ratio CNR is taken as a reference in the reverse direction, and when the contrast to noise ratio CNR is consistent with other scanning conditions, the scanning current value required to be paid out for pairing each shape information and voltage value is reversely deduced, that is, the calculation formula (6) of the scanning current value is:

further, since the scanning current value is calculated based on the shape information and the voltage value of each combination pair, a plurality of scanning current values are obtained.

In an embodiment of the present invention, for further limitation and explanation, after step 103 determines a radiation dose value based on the scan current value and screens out a radiation dose of the target region from the radiation dose value, the method further includes: and generating scanning conditions to be scanned according to the radiation dose and the shape information, the voltage value and the current value matched with the radiation dose, and storing the scanning conditions.

In order to scan a target area based on the optimal radiation dose, after the selected minimum radiation dose value is used as the scanned radiation dose, the shape information and the voltage value of the group of shape filters corresponding to the radiation dose CTDI value and the corresponding calculated scanning current value are selected as the scanning conditions required by actual paying-off and stored in the scanning equipment so as to start the scanning equipment to scan.

In an embodiment of the present invention, for further limitation and description, the method further includes: and responding to a scanning execution instruction of the target area, and configuring the scanning condition in an execution parameter corresponding to a scanning operation.

In order to reduce errors caused by human intervention and improve the accuracy of radiation dose selection, an operator sends a scanning execution instruction to start a current radiation dose determination method, so that the determination process is automatically completed. After receiving the scan command of the target region, the processing end as the current execution end completes the determination of the radiation dose, and directly configures the scan conditions in the scanning device for scanning, so that radiation dose setting instruction information may be sent to the scanning device, so that the scanning device starts plain film scanning, so as to perform the method for determining the radiation dose in the embodiment of the present invention, as shown in fig. 4.

Compared with the prior art, the embodiment of the invention provides a method for determining the radiation dose, which is characterized in that the contrast-to-noise ratio matched with a target area is obtained, and the contrast-to-noise ratio is determined based on the reference current value of the plain film scanning image data of the target area; determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio; the radiation dose value is determined based on the scanning current value, and the radiation dose of the target area is screened out from the radiation dose value, so that the adaptability and the automation of the modulation of the radiation dose are realized, the error of artificial modulation is avoided, the requirements of different scanning areas for modulating different radiation doses are met, and the accuracy and the efficiency of the radiation dose determination are greatly improved.

Further, as an implementation of the method shown in fig. 1, an embodiment of the present invention provides a radiation dose determination apparatus, as shown in fig. 5, including:

an obtaining module 41, configured to obtain a contrast-to-noise ratio matched with a target region, where the contrast-to-noise ratio is determined based on a reference current value of flatbed scanning image data of the target region;

a first determining module 42, configured to determine shape information and a voltage value of a shape filter to be scanned, and obtain a scanning current value matching the shape information and the voltage value in combination with the contrast-to-noise ratio;

a second determining module 43, configured to determine a radiation dose value based on the scan current value, and screen out a radiation dose of the target region from the radiation dose value.

Further, the apparatus further comprises:

the starting module is used for starting the plain film scanning operation of all the areas and collecting plain film scanning image data;

and the calculating module is used for calculating a reference current value based on the plain film scanning image data and the equivalent liquid model diameter corresponding to the whole area, wherein the equivalent liquid model diameter is equivalent shape and size information between the whole area and preset liquid.

Further, the calculation module includes:

the device comprises a first determining unit, a second determining unit and a control unit, wherein the first determining unit is used for selecting a scanning protocol and determining a preset diameter and a preset current value which are matched with the scanning protocol;

and the calculating unit is used for calculating the equivalent liquid mode diameter of all the areas based on each slice of the plain film scanning image data, and calculating a reference current value matched with the preset diameter, the preset current value and the equivalent liquid mode diameter by a preset current calculating function.

Further, the air conditioner is provided with a fan,

the obtaining module is specifically configured to determine the reference current value and the equivalent liquid mode diameter of the target region as a scanning condition, and determine a contrast-to-noise ratio generated by scanning under the scanning condition.

Further, the air conditioner is provided with a fan,

the first determining module is specifically configured to obtain all shape information and all voltage values of the shape filter, perform combination pairing on the shape information and the voltage values, obtain a combination pair of the shape information and the voltage values to be scanned, and calculate a scanning current value corresponding to the shape information and the voltage values of different combination pairs.

Further, the apparatus further comprises:

and the generating module is used for generating scanning conditions to be scanned according to the radiation dose and the shape information, the voltage value and the current value matched with the radiation dose, and storing the scanning conditions.

Further, the apparatus further comprises:

the configuration module is used for responding to a scanning execution instruction of the target area and configuring the scanning condition into an execution parameter corresponding to scanning operation;

compared with the prior art, the embodiment of the invention provides a device for determining the radiation dose, and the device comprises a processing unit, a control unit and a display unit, wherein the processing unit is used for obtaining the contrast-to-noise ratio matched with a target area, and the contrast-to-noise ratio is determined based on the reference current value of the plain film scanning image data of the target area; determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio; the radiation dose value is determined based on the scanning current value, and the radiation dose of the target area is screened out from the radiation dose value, so that the adaptability and the automation of the modulation of the radiation dose are realized, the error of artificial modulation is avoided, the requirements of different scanning areas for modulating different radiation doses are met, and the accuracy and the efficiency of the radiation dose determination are greatly improved.

According to an embodiment of the present invention, there is provided a storage medium storing at least one executable instruction, the computer executable instruction being capable of executing the method of determining a radiation dose in any of the method embodiments described above.

Fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the terminal.

As shown in fig. 6, the terminal may include: a processor (processor)502, a Communications Interface 504, a memory 506, and a communication bus 508.

Wherein: the processor 502, communication interface 504, and memory 506 communicate with one another via a communication bus 508.

A communication interface 504 for communicating with network elements of other devices, such as clients or other servers.

The processor 502 is configured to execute the program 510, and may specifically execute relevant steps in the above-described method for determining a radiation dose.

In particular, program 510 may include program code that includes computer operating instructions.

The processor 502 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement an embodiment of the present invention. The terminal comprises one or more processors, which can be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.

And a memory 506 for storing a program 510. The memory 506 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The program 510 may specifically be used to cause the processor 502 to perform the following operations:

acquiring a contrast-to-noise ratio matched with a target region, wherein the contrast-to-noise ratio is determined based on a reference current value of plain film scanning image data of the target region;

determining shape information and a voltage value of a shape filter to be scanned, and obtaining a scanning current value matched with the shape information and the voltage value by combining the contrast-to-noise ratio;

and determining a radiation dose value based on the scanning current value, and screening out the radiation dose of the target area from the radiation dose value.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.