Head and neck coil, radio frequency signal processing method and magnetic resonance imaging device
阅读说明:本技术 头颈线圈、射频信号处理方法和磁共振成像装置 (Head and neck coil, radio frequency signal processing method and magnetic resonance imaging device ) 是由 佟瞳 于 2018-08-02 设计创作,主要内容包括:本发明公开了一种头颈线圈、射频信号处理方法和磁共振成像装置。所述头颈线圈包括:头线圈模块,其输出第一组射频信号;颈线圈模块,其输出第二组射频信号;头颈间射频通道切换模块,其在所述第一组射频信号中的至少一部分与所述第二组射频信号之间进行选通切换;附加线圈接口模块,其能够连接至少一个附加线圈;线圈间射频通道切换模块,其在所述至少一个附加线圈输出的第三组射频信号与全部或部分的所述第一组射频信号和第二组射频信号之间进行选通切换。(The invention discloses a head and neck coil, a radio frequency signal processing method and a magnetic resonance imaging device. The head and neck coil includes: a head coil module outputting a first set of radio frequency signals; a neck coil module that outputs a second set of radio frequency signals; an inter-head radio frequency channel switching module that gate switches between at least a portion of the first set of radio frequency signals and the second set of radio frequency signals; an additional coil interface module capable of connecting at least one additional coil; and the inter-coil radio frequency channel switching module is used for performing gating switching between the third group of radio frequency signals output by the at least one additional coil and all or part of the first group of radio frequency signals and the second group of radio frequency signals.)
1. A head and neck coil (10), comprising:
a head coil module (110) capable of outputting a first set of radio frequency signals;
a neck coil module (120) capable of outputting a second set of radio frequency signals;
an inter-head and neck radio frequency channel switching module (13) that gate switches between at least a portion of the first set of radio frequency signals and the second set of radio frequency signals;
an additional coil interface module (14) to which at least one additional coil can be connected;
an inter-coil radio frequency channel switching module (15) that gate switches between a third set of radio frequency signals output by the at least one additional coil and all or part of the first and second sets of radio frequency signals.
2. The whip coil of claim 1,
the head coil module comprises a plurality of head coil sections and a plurality of first mode matrix modules which are arranged corresponding to the head coil sections, and the first mode matrix modules respectively synthesize radio-frequency signals of the head coil sections which are arranged corresponding to the first mode matrix modules to obtain the first group of radio-frequency signals.
3. The whip coil of claim 1,
the neck coil module comprises a plurality of neck coil sections and a plurality of second mode matrix modules which are arranged corresponding to the neck coil sections, and the second mode matrix modules respectively synthesize radio frequency signals of the neck coil sections which are arranged corresponding to the second mode matrix modules to obtain a second group of radio frequency signals; alternatively, the neck coil module comprises a plurality of neck coil sections that directly output the second set of radio frequency signals.
4. The whip coil of claim 1,
the head-neck radio frequency channel switching module comprises a plurality of head-neck radio frequency channel switching sub-modules, and each head-neck radio frequency channel switching sub-module is used for carrying out gating switching between one part of radio frequency signals output by a first mode matrix module of the head coil module and one radio frequency signal output by a neck coil section of the neck coil module or one radio frequency signal output by a second mode matrix module of the neck coil module.
5. The whip coil of claim 1,
the head coil module (110) includes: m1 head coil sections, each head coil section comprising N1 head coil units; and M1 first mode matrix modules (12), wherein each first mode matrix module (12) corresponds to one head coil section and is used for synthesizing the radio frequency signals of N1 head coil units of the head coil section and outputting N2 synthesized radio frequency signals; wherein M1 is 2 or 4; n1 and N2 are natural numbers larger than 1, and N1 is not less than N2; M1N 2 is P, and P is the number of receiver channels of the magnetic resonance imaging system;
the neck coil module (120) comprises: two neck coil sections, each neck coil section comprising N3 neck coil units; and M2 second mode matrix modules, wherein M2 is 0 or 2, and when M2 is 2, each second mode matrix module corresponds to one neck coil segment, and is configured to perform synthesis processing on radio frequency signals of N3 neck coil units of the neck coil segment, and output N4 synthesized radio frequency signals; wherein N3 and N4 are natural numbers more than or equal to 1, and N3 is more than or equal to N4; when N3 is 1 or 2, M2 is 0, the neck coil module (120) directly outputs N3 radio frequency signals of N3 neck coil units respectively included in the two neck coil sections; wherein, when N3 is a natural number greater than 2, M2 is 2;
the additional coil interface module (14) comprises at least one additional coil interface submodule, each additional coil interface submodule being capable of connecting an additional coil;
the inter-head-neck radio frequency channel switching module (13) comprises: m1 head-neck radio frequency channel switching sub-modules, when M1 is 2 and M2 is 0, each head-neck radio frequency channel switching sub-module is used for carrying out gating switching between N3 radio frequency signals output by one neck coil section and N3 radio frequency signals in N2 radio frequency signals output by one first mode matrix module (12); when M1 is 2 and M2 is 2, each inter-head-and-neck rf channel switching submodule is configured to gate and switch between N4 rf signals output by one second mode matrix module and N4 rf signals among N2 rf signals output by one first mode matrix module (12); when M1 is 4 and M2 is 0, N3 is 2, each head-neck rf channel switching submodule is configured to gate and switch between one rf signal output by one neck coil unit and one rf signal of N2 rf signals output by one first mode matrix module (12); when the M1 is 4 and the M2 is 2, each inter-head-and-neck rf channel switching submodule is configured to gate and switch between N4/2 rf signals output by one second mode matrix module and N4/2 rf signals among N2 rf signals output by one first mode matrix module (12);
the inter-coil radio frequency channel switching module (15) includes: the first inter-coil switching module is used for switching between the radio-frequency signals gated by the M3 inter-head and neck radio-frequency channel switching sub-modules and the radio-frequency signals, of the N5 radio-frequency signals output by the at least one additional coil, of which the number is the same as that of the radio-frequency signals gated by the M3 inter-head and neck radio-frequency channel switching sub-modules; and a second inter-coil switching module for switching between radio frequency signals output by the M3 first mode matrix modules (12) excluding radio frequency signals supplied to the M3 inter-head-neck radio frequency channel switching sub-modules and radio frequency signals output by the at least one additional coil excluding radio frequency signals supplied to the first inter-coil switching module; wherein M3 and N5 are natural numbers, M1 is more than or equal to M3, and P is more than or equal to N5;
the radio frequency signal gated by the inter-coil radio frequency channel switching module (15) is output to a receiver of the magnetic resonance imaging system;
when M1 > M3, the radio frequency signals gated by the remaining (M1-M3) head-neck radio frequency channel switching sub-modules and the radio frequency signals output by the remaining (M1-M3) first mode matrix modules (12) except the radio frequency signals provided to the (M1-M3) head-neck radio frequency channel switching sub-modules are directly output to a receiver of the magnetic resonance imaging system.
6. The head and neck coil of claim 5 wherein P-12, the values of M1, M2, M3, N1, N2, N3, N4, N5 are any of the following:
m1 ═ 2, N3 ═ 1 or 2, M2 ═ 0, N1 ≥ N2 ≥ 6, M3 ═ 1 or 2, N5 ═ 6 or 12;
m1 ═ 2, N3 > 2, M2 ═ 2, N4 ═ 1 or 2, N1 ≥ N2 ═ 6, M3 ═ 1 or 2, N5 ═ 6 or 12;
m1 ═ 4, N3 ═ 2, M2 ═ 0, N1 ≥ N2 ═ 3, M3 ═ 2 or 4, N5 ═ 6 or 12; and
m1 ═ 4, N3 > 2, M2 ═ 2, N4 ═ 2, N1 ≥ N2 ═ 3, M3 ═ 2 or 4, N5 ═ 6 or 12.
7. The whip coil as claimed in claim 5, wherein the synthesized N2 RF signals outputted by each of the first pattern matrix modules (12) include at least one head edge information signal and at least one head main information signal;
the synthesized N4 radio frequency signals output by each second mode matrix module comprise at least one neck main information signal;
each head-neck radio frequency channel switching submodule is used for carrying out gating switching between N3 radio frequency signals output by one neck coil unit section and N3 head edge information signals in N2 radio frequency signals output by one first mode matrix module (12); or gate switching is carried out between N4 radio frequency signals output by the second mode matrix module and N4 head edge information signals in N2 radio frequency signals output by the first mode matrix module (12); or gate switching between a radio frequency signal output from a neck coil unit and a head edge information signal of N2 radio frequency signals output from a first pattern matrix module (12); or gate switching is performed between N4/2 RF signals outputted from a second pattern matrix module and N4/2 header edge information signals among N2 RF signals outputted from a first pattern matrix module (12).
8. The whip coil of claim 5, wherein the third set of radio frequency signals output by the at least one additional coil comprises: a third party edge information signal and a third party primary information signal;
the first inter-coil switching module is used for switching between radio frequency signals gated by the M3 inter-head-neck radio frequency channel switching sub-modules and third-party edge information signals of the N5 radio frequency signals output by the at least one additional coil, wherein the number of the third-party edge information signals is the same as that of the radio frequency signals gated by the M3 inter-head-neck radio frequency channel switching sub-modules.
9. The whip coil of claim 5,
when the head coil module (110) is used alone, the inter-head-neck radio frequency channel switching module (13) and the inter-coil radio frequency channel switching module (15) both gate radio frequency signals from the head coil module (110);
when the neck coil module (120) is used alone, the inter-head and inter-coil radio frequency channel switching modules (13, 15) both gate radio frequency signals from the neck coil module (120) while the head coil module (110) is detuned;
when the head coil module (110) and the neck coil module (120) are used simultaneously without using an additional coil, the inter-head and neck radio frequency channel switching module (13) gates radio frequency signals from the neck coil module (120), a first inter-coil switching module in the inter-coil radio frequency channel switching module (15) gates radio frequency signals from an inter-head and neck radio frequency channel switching submodule, and a second inter-coil switching module in the inter-coil radio frequency channel switching module (15) gates radio frequency signals from the first mode matrix module (12);
when the additional coil is used alone, the inter-coil radio frequency channel switching module (15) gates a radio frequency signal from the additional coil;
when the head coil module (110), the neck coil module (120) and the additional coil are used simultaneously, the radio-frequency signals from the neck coil module (120) are gated by the inter-head and neck radio-frequency channel switching module (13), the radio-frequency signals from the inter-head and neck radio-frequency channel switching submodule are gated by a first inter-coil switching module in the inter-coil radio-frequency channel switching module (15), and the radio-frequency signals from the additional coil are gated by a second inter-coil switching module in the inter-coil radio-frequency channel switching module (15).
10. The neck coil according to any of claims 1 to 9, wherein the neck coil (10) comprises two parts, an upper part and a lower part, the lower part of the neck coil (10) is integrated on a patient bed of a magnetic resonance imaging system, or a cable connection is used between the lower part of the neck coil (10) and the patient bed.
11. The whip coil of any one of claims 1-9, wherein said at least one additional coil comprises one or two body coils.
12. A method of radio frequency signal processing using a neck coil (10) according to any of claims 1 to 11, comprising:
according to the use requirement of the head and neck coil (10), outputting a first group of radio frequency signals through the head coil module (110) and/or outputting a second group of radio frequency signals through the neck coil module (120);
gating switching between a portion of the second set of radio frequency signals and the first set of radio frequency signals;
judging whether an additional coil is connected to the head and neck coil (10);
if yes, according to the use requirements of the head and neck coil (10) and the additional coil, the third group of radio frequency signals output by the additional coil and part or all of the second group of radio frequency signals and the first group of radio frequency signals are switched in a gating mode.
13. The radio frequency signal processing method of claim 12, wherein the first set of radio frequency signals comprises: a header edge information signal and a header main information signal;
said gating switching between a second set of radio frequency signals and a portion of said first set of radio frequency signals to: gating switching between the second set of radio frequency signals and a portion of the header-edge information signal.
14. The radio frequency signal processing method according to claim 13, wherein if the additional coil is connected to the neck coil (10); the third set of radio frequency signals output by the additional coil comprises: a third party edge information signal and a third party primary information signal;
the third group of radio frequency signals output by the additional coil and part or all of the second group of radio frequency signals and the first group of radio frequency signals are switched in a gating mode: switching between a portion of the third set of edge information signals and a portion or all of the second set of radio frequency signals; switching between a remaining signal of the third set of radio frequency signals and a portion or all of the first set of radio frequency signals.
15. A magnetic resonance imaging apparatus, characterized in that the magnetic resonance imaging apparatus comprises a head and neck coil (10) according to any one of claims 1 to 11.
Technical Field
The invention relates to the field of magnetic resonance imaging, in particular to a head and neck coil for a magnetic resonance imaging device, a radio frequency signal processing method and the magnetic resonance imaging device comprising the head and neck coil.
Background
Magnetic Resonance Imaging (MRI) is a technique for Imaging using a Magnetic Resonance phenomenon. A magnetic resonance imaging system generally includes a superconducting magnet of a cavity type, gradient coils surrounding the superconducting magnet, a body coil of the cavity type located in the gradient coils, a table board on which a patient is placed, and local coils for covering a certain portion of the patient, such as a knee coil, a shoulder coil, a spine coil, a wrist coil, a body coil, a head and neck coil, etc.
At present, with the development of new technologies such as integrated Parallel Acquisition technologies (ipats) and Simultaneous Multi-layer imaging technologies (SMS) imaging technologies, the requirement on the number of local coil elements in each direction is increasing, which results in more and more connectors and cables on the coil and the patient bed, and further increases the cost, and thus it is difficult to apply the technology to a low-end magnetic resonance imaging system with higher technical requirements and lower cost targets.
Usually, many neck coils are connected to the hospital bed by direct plug-in connection, so that heavy cables can be reduced, usability is improved, and cost is relatively low. However, since the whip coil occupies most of the time the in-line receptacle on the patient's bed, if it is desired to scan using a combination of coils, for example, a body coil and a head/neck coil, some additional receptacle must be reserved on the patient's bed, which increases the cables and connectors, again resulting in increased system cost.
Although there are now whip coils with extra sockets provided on them, saving on the use of cables and connectors, effective processing of the signals acquired by multiple coils remains a difficult point when whip coils and other additional coils are used simultaneously.
Disclosure of Invention
In view of the above, the present invention provides a head and neck coil, comprising: a head coil module outputting a first set of radio frequency signals; a neck coil module that outputs a second set of radio frequency signals; an inter-head radio frequency channel switching module that gate switches between at least a portion of the first set of radio frequency signals and the second set of radio frequency signals; an additional coil interface module capable of connecting at least one additional coil; and the inter-coil radio frequency channel switching module is used for performing gating switching between the third group of radio frequency signals output by the at least one additional coil and all or part of the first group of radio frequency signals and the second group of radio frequency signals.
In one embodiment, the head coil module includes a plurality of head coil segments and a plurality of first pattern matrix modules corresponding to the plurality of head coil segments, and the plurality of first pattern matrix modules respectively synthesize radio frequency signals of the head coil segments corresponding to the plurality of first pattern matrix modules to obtain the first group of radio frequency signals.
In one embodiment, the neck coil module includes a plurality of neck coil sections and a plurality of second mode matrix modules corresponding to the plurality of neck coil sections, and the plurality of second mode matrix modules respectively synthesize radio frequency signals of the neck coil sections corresponding to the plurality of second mode matrix modules to obtain the second group of radio frequency signals; alternatively, the neck coil module comprises a plurality of neck coil sections that directly output the second set of radio frequency signals.
In one embodiment, the head-neck rf channel switching module includes a plurality of head-neck rf channel switching sub-modules, and each head-neck rf channel switching sub-module is configured to gate and switch between a part of an rf signal output by a first mode matrix module disposed on the head coil module and an rf signal output by a neck coil section disposed on the neck coil module or an rf signal output by a second mode matrix module disposed on the neck coil module.
In one embodiment, the head coil module includes: m1 head coil sections, each head coil section comprising N1 head coil units; and M1 first mode matrix modules, each corresponding to a head coil segment, for synthesizing the radio frequency signals of the N1 head coil units of the head coil segment and outputting the synthesized N2 radio frequency signals; wherein M1 is 2 or 4; n1 and N2 are natural numbers larger than 1, and N1 is not less than N2; M1N 2 is P, and P is the number of receiver channels of the magnetic resonance imaging system; the neck coil module includes: two neck coil sections, each neck coil section comprising N3 neck coil units; and M2 second mode matrix modules, wherein M2 is 0 or 2, and when M2 is 2, each second mode matrix module corresponds to one neck coil segment, and is configured to perform synthesis processing on radio frequency signals of N3 neck coil units of the neck coil segment, and output N4 synthesized radio frequency signals; wherein N3 and N4 are natural numbers more than or equal to 1, and N3 is more than or equal to N4; when N3 is 1 or 2, M2 is 0, and the neck coil module directly outputs N3 radio frequency signals of N3 neck coil units respectively included in the two neck coil sections; wherein, when N3 is a natural number greater than 2, M2 is 2; the additional coil interface module comprises at least one additional coil interface submodule, and each additional coil interface submodule can be connected with an additional coil; the radio frequency channel switches module between the head neck includes: when M1 is 2 and M2 is 0, each head-neck rf channel switching submodule is used for gate switching between N3 rf signals output by one neck coil section and N3 rf signals in N2 rf signals output by one first mode matrix module; when M1 is 2 and M2 is 2, each inter-head-and-neck rf channel switching sub-module is configured to gate and switch between N4 rf signals output by one second mode matrix module and N4 rf signals among N2 rf signals output by one first mode matrix module; when M1 is 4 and M2 is 0, N3 is 2, each head-neck rf channel switching submodule is configured to gate and switch between one rf signal output by one neck coil unit and one rf signal of the N2 rf signals output by one first pattern matrix module; when M1 is 4 and M2 is 2, each inter-head-and-neck rf channel switching submodule is configured to gate and switch between N4/2 rf signals output by one second mode matrix module and N4/2 rf signals among N2 rf signals output by one first mode matrix module; the inter-coil radio frequency channel switching module comprises: the first inter-coil switching module is used for switching between the radio-frequency signals gated by the M3 inter-head and neck radio-frequency channel switching sub-modules and the radio-frequency signals, of the N5 radio-frequency signals output by the at least one additional coil, of which the number is the same as that of the radio-frequency signals gated by the M3 inter-head and neck radio-frequency channel switching sub-modules; and a second inter-coil switching module for switching between radio frequency signals output by the M3 first mode matrix modules excluding radio frequency signals supplied to the M3 inter-head-neck radio frequency channel switching sub-module and radio frequency signals output by the at least one additional coil excluding radio frequency signals supplied to the first inter-coil switching module; wherein M3 and N5 are natural numbers, M1 is more than or equal to M3, and P is more than or equal to N5; the radio frequency signal gated by the inter-coil radio frequency channel switching module is output to a receiver of the magnetic resonance imaging system; when M1 > M3, the radio frequency signals gated by the remaining (M1-M3) head-neck radio frequency channel switching sub-modules and the radio frequency signals output by the remaining (M1-M3) first mode matrix modules except the radio frequency signals provided to the (M1-M3) head-neck radio frequency channel switching sub-modules are directly output to a receiver of the magnetic resonance imaging system. Therefore, the temperature of the molten metal is controlled,
in one embodiment, P is 12, and the values of M1, M2, M3, N1, N2, N3, N4, and N5 are any one of the following values: m1 ═ 2, N3 ═ 1 or 2, M2 ═ 0, N1 ≥ N2 ≥ 6, M3 ═ 1 or 2, N5 ═ 6 or 12; m1 ═ 2, N3 > 2, M2 ═ 2, N4 ═ 1 or 2, N1 ≥ N2 ═ 6, M3 ═ 1 or 2, N5 ═ 6 or 12; m1 ═ 4, N3 ═ 2, M2 ═ 0, N1 ≥ N2 ═ 3, M3 ═ 2 or 4, N5 ═ 6 or 12; and M1-4, N3 > 2, M2-2, N4-2, N1 ≧ N2-3, M3-2 or 4, N5-6 or 12.
In one embodiment, the synthesized N2 rf signals output by each of the first pattern matrix modules include at least one header edge information signal and at least one header main information signal; the synthesized N4 radio frequency signals output by each second mode matrix module comprise at least one neck main information signal; each head-neck radio frequency channel switching submodule is used for gating and switching between N3 radio frequency signals output by one neck coil unit section and N3 head edge information signals in N2 radio frequency signals output by one first mode matrix module; or gate switching is carried out between N4 radio frequency signals output by the second mode matrix module and N4 head edge information signals in N2 radio frequency signals output by the first mode matrix module; or gate switching is carried out between a radio frequency signal output by a neck coil unit and a head edge information signal in N2 radio frequency signals output by a first mode matrix module; or gate switching is carried out between N4/2 radio frequency signals output by the second mode matrix module and N4/2 head edge information signals in N2 radio frequency signals output by the first mode matrix module.
In one embodiment, when the head coil module is used alone, the inter-head-neck radio frequency channel switching module and the inter-coil radio frequency channel switching module both gate radio frequency signals from the head coil module; when the neck coil module is used independently, the radio-frequency channel switching module between the heads and the necks and the radio-frequency channel switching module between the coils gate the radio-frequency signals from the neck coil module, and the head coil module is detuned; when the head coil module and the neck coil module are used simultaneously without using an additional coil, the head-neck radio frequency channel switching module gates a radio frequency signal from the neck coil module, a first coil-neck radio frequency channel switching module in the inter-coil radio frequency channel switching module gates a radio frequency signal from the head-neck radio frequency channel switching submodule, and a second coil-neck radio frequency channel switching module in the inter-coil radio frequency channel switching module gates a radio frequency signal from the first mode matrix module; when the additional coil is used alone, the inter-coil radio frequency channel switching module gates a radio frequency signal from the additional coil; when the head coil module, the neck coil module and the additional coil are used simultaneously, the radio-frequency signal from the neck coil module is gated by the head-neck radio-frequency channel switching module, the radio-frequency signal from the head-neck radio-frequency channel switching submodule is gated by a first coil switching module in the inter-coil radio-frequency channel switching module, and the radio-frequency signal from the additional coil is gated by a second coil switching module in the inter-coil radio-frequency channel switching module.
In one embodiment, the head and neck coil comprises an upper part and a lower part, the lower part of the head and neck coil is integrally integrated on a sickbed of a magnetic resonance imaging system, or the lower part of the head and neck coil is connected with the sickbed by a cable.
In one embodiment, the at least one additional coil comprises one or two body coils.
In another embodiment of the present invention, there is also provided a radio frequency signal processing method using the above head-neck coil, the method including: according to the use requirement of the head and neck coil, outputting a first group of radio frequency signals through the head coil module, and/or outputting a second group of radio frequency signals through the neck coil module; gating switching between a portion of the second set of radio frequency signals and the first set of radio frequency signals; judging whether an additional coil is connected to the head and neck coil; if yes, according to the use requirements of the head and neck coil and the additional coil, gating and switching are carried out on a third group of radio frequency signals output by the additional coil and a part or all of the second group of radio frequency signals and the first group of radio frequency signals.
In one embodiment, the first set of radio frequency signals comprises: a header edge information signal and a header main information signal;
said gating switching between a second set of radio frequency signals and a portion of said first set of radio frequency signals to: gating switching between the second set of radio frequency signals and a portion of the header-edge information signal.
In one embodiment, if the additional coil is connected to the neckline coil; the third set of radio frequency signals output by the additional coil comprises: a third party edge information signal and a third party primary information signal; the third group of radio frequency signals output by the additional coil and part or all of the second group of radio frequency signals and the first group of radio frequency signals are switched in a gating mode: switching between a portion of the third party edge information signals and a portion or all of the second set of radio frequency signals; switching between a remaining signal of the third set of radio frequency signals and a portion or all of the first set of radio frequency signals.
According to another embodiment of the invention, a magnetic resonance imaging apparatus is also provided, wherein the magnetic resonance imaging apparatus comprises the above-mentioned head and neck coil.
It can be seen from the above solution that, since the head and neck coil provided by the present invention can be applied to a low-end magnetic resonance imaging system with high application requirements, and an additional coil interface module is disposed on the head and neck coil to additionally connect the additional coil, the head and neck coil and the additional coil can be used in combination, and thus the present invention is particularly suitable for the case of using multiple coils in combination. When the radio frequency switching module between the head and the neck and the radio frequency switching module between the coils are used in a combined mode, various signals can be effectively gated and switched through the radio frequency switching module between the head and the neck, and finally the system receiver can receive effective radio frequency signals from the head and the neck coils.
In addition, by integrating the lower portion of the whiplash coil on the patient bed, a connector of lower cost and smaller size can be used, thereby having good applicability and saving expensive connector cost.
In addition, the number of receive radio frequency channels of the system receiver can be increased without modifying the original magnetic resonance imaging system. An additional coil interface module can support multiple local coils and does not require complex communication protocols to enable radio frequency channel switching using tuned/detuned control signal lines.
Furthermore, the operator can more conveniently put multiple local coils together and bring many benefits for advanced applications such as full pixel matrices.
Drawings
The foregoing and other features and advantages of the invention will become more apparent to those skilled in the art to which the invention relates upon consideration of the following detailed description of a preferred embodiment of the invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic block diagram of a head and neck coil according to an embodiment of the present invention;
fig. 2 is a block diagram of an exemplary signal processing for a head and neck coil and an additional coil in accordance with an embodiment of the present invention;
fig. 3 is a block diagram of an exemplary signal processing for a head and neck coil and an additional coil in accordance with an embodiment of the present invention;
fig. 4 is a block diagram of an exemplary signal processing for a head and neck coil and an additional coil in accordance with an embodiment of the present invention;
fig. 5 is a flow chart of a radio frequency signal processing method according to an embodiment of the present invention.
Wherein the reference numbers are as follows:
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples.
Referring to fig. 1, fig. 1 is a schematic block diagram of a
An additional
In the present embodiment, the
Similarly, the
In addition, a head-neck radio frequency
In one embodiment, M1 is 2, M2 is 0, and each inter-head-neck rf channel switching submodule is configured to gate between N3 rf signals output from one neck coil segment and N3 rf signals of the N2 rf signals output from one first pattern matrix module. In another embodiment, M1 is 2, M2 is 2, and each inter-head-and-neck rf channel switching submodule is configured to gate and switch between N4 rf signals output by one second mode matrix module and N4 rf signals of N2 rf signals output by one first mode matrix module. In another embodiment, M1 is 4, M2 is 0, and N3 is 2, and each inter-head-and-neck rf channel switching submodule is configured to gate-switch between one rf signal output by one neck coil unit and one of the N2 rf signals output by one first pattern matrix module. In another embodiment, M1 is 4, M2 is 2, and each inter-head-and-neck rf channel switching submodule is configured to gate and switch between N4/2 rf signals output by one second mode matrix module and N4/2 rf signals among N2 rf signals output by one first mode matrix module.
The head and
The inter-coil rf
In addition, after the inter-coil radio frequency
In one embodiment, the N2 synthesized rf signals output by the first pattern matrix module may generally include a header edge information signal and a header main information signal, both of which are at least one in number. The head-edge information signal may be a radio frequency signal of a less important part of the patient's head, and the head-primary information signal may be a radio frequency signal of a more important part of the patient's head. The N4 rf signals output by the second pattern matrix module may include at least one neck primary information signal indicative of rf signals of a significant portion of the patient's neck.
In embodiments of the present invention, the
The following description will be made by taking a case where there are 12 receiver channels as an example and by taking a few specific examples.
First example
Referring to fig. 2, in this embodiment, M1 is 4, N1 is 4, N2 is 3, M2 is 0, N3 is 2, and N4 is 2. Specifically, the
In addition, the
When the
Alternatively, in this example, the signals gated from the head-neck rf channel switching sub-module 131-.
When the
When the
When the
When the
Second example
Referring to fig. 3, in this embodiment, M1 is 4, N1 is 3, N2 is 3, M2 is 2, N3 is 3, and N4 is 2. Specifically, the
In addition, the
In the present embodiment, the signal gate switching operation in each use case is substantially the same except for the signal processing operation performed in the
Third example
Referring to fig. 4, in this embodiment, M1 is 4, N1 is 3, N2 is 3, M2 is 0, N3 is 2, and N4 is 2. Specifically, the
In addition, in this embodiment, two
In the present embodiment, the signal gate switching in each use case is substantially the same in the present embodiment except for the signal gate operation performed in the
In each of the above operating modes, there are no more than 12 output channels that are ultimately connected to the
In addition, it should be noted that, although in each of the above operations, the number of coil channels in the head-
In another embodiment of the present invention, there is also provided a method for performing radio frequency signal processing in a magnetic resonance imaging system, as shown in step S1 in fig. 5, first, according to the usage requirement, i.e. specific operation mode, of the head and
In various operation modes of the head and neck coil, the signal transmission and gating operations in the specific radio frequency signal processing method are similar to those described above, and are not described herein again.
In addition, in another embodiment of the present invention, a magnetic resonance imaging system is further provided, which may include the above-mentioned head and neck coil and may perform the above-mentioned radio frequency signal processing method.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.