Nuclear magnetic resonance system, radio frequency emission signal correction method and device and medical equipment

Abstract

The invention relates to a nuclear magnetic resonance system, a radio frequency emission signal correction method and 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, and the radio frequency transmitting coil comprises at least one radio frequency coil transmitting channel; each system radio frequency transmitting channel can be inserted into any radio frequency coil transmitting channel and can be pulled out from the inserted radio frequency coil transmitting channel; the processing assembly is used for calibrating a radio frequency emission signal emitted by the total radio frequency emission channel according to amplitude gains and phases corresponding to the system radio frequency emission channel and the radio frequency coil emission channel which are mutually plugged; the total radio frequency transmitting channel is composed of a system radio frequency transmitting channel and a radio frequency coil transmitting channel which are mutually plugged. By adopting the nuclear magnetic resonance system, the scanning efficiency of the nuclear magnetic resonance system can be improved.

Description

[0001] This application is a divisional application of the Chinese invention patent application with the application date of August 4, 2021, application number 2021108923185, and application name "Nuclear Magnetic Resonance System, Radio Frequency Transmission Signal Correction Method, Device and Medical Equipment". Technical Field

[0002] The present application relates to the field of nuclear magnetic resonance technology, and in particular to a nuclear magnetic resonance system, a radio frequency transmission signal correction method and a medical device. Background Art

[0003] With the rapid development of medical technology, magnetic resonance imaging technology has become more and more mature. Magnetic resonance imaging can not only show tangible physical lesions, but also accurately determine the functional responses of the brain, heart, liver, etc. In high-field and ultra-high-field magnetic resonance systems, two radio frequency transmission channels are usually used to process the radio frequency transmission signal to obtain radio frequency transmission signals with fixed amplitude and phase, and the radio frequency transmission signals with fixed amplitude and phase are transmitted to the scanned part. The changes in the internal electrons of the scanned part are obtained, and images are generated based on the internal electrons of the scanned part. Among them, each complete radio frequency transmission channel consists of a system radio frequency transmission channel and a radio frequency coil transmission channel.

[0004] In traditional technology, the radio frequency transmission channel has low flexibility and many inconveniences during use, thus affecting the efficiency of scanning using the nuclear magnetic resonance system. Summary of the invention

[0005] Based on this, it is necessary to provide a nuclear magnetic resonance system, a radio frequency transmission signal correction method, device and medical equipment to improve the scanning efficiency of the nuclear magnetic resonance system in response to the above-mentioned technical problems.

[0006] In a first aspect, a nuclear magnetic resonance system is provided, which includes a processing component, a plurality of system radio frequency transmission channels and at least one radio frequency transmission coil, wherein the radio frequency transmission coil includes at least one radio frequency coil transmission channel; each system radio frequency transmission channel can be plugged into any radio frequency coil transmission channel; the processing component is used to calibrate the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the mutually plugged system radio frequency transmission channels and radio frequency coil transmission channels; the total radio frequency transmission channel is composed of the mutually plugged system radio frequency transmission channels and radio frequency coil transmission channels.

[0007] In one of the embodiments, the processing component is specifically used to: calibrate the amplitude of the RF transmission signal emitted by the total RF transmission channel according to the amplitude gains respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other; calibrate the phase of the RF transmission signal emitted by the total RF transmission channel according to the phases respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other.

[0008] In one embodiment, the total RF transmission channel includes multiple processing components, which are specifically used to: obtain the amplitude-gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels; and calibrate the amplitude of the RF transmission signal emitted by each total RF transmission channel according to the amplitude-gain relationship and the amplitude gain corresponding to each total RF transmission channel.

[0009] In one embodiment, the total RF transmission channel includes multiple processing components, which are specifically used to: obtain the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels; and calibrate the phase of the RF transmission signal emitted by each total RF transmission channel according to the phase relationship and the phase corresponding to each total RF transmission channel.

[0010] In one embodiment, the processing component is specifically used to: when the amplitude gain relationship is that the amplitude gain of the RF transmission signals emitted by each total RF transmission channel is consistent, multiply the amplitude of each RF transmission signal by the corresponding amplitude calibration value.

[0011] In one of the embodiments, the processing component is specifically configured to: when the phase relationship is that the phases of the RF transmission signals emitted by the total RF transmission channels are consistent, subtract the corresponding phase calibration value from the phase of each RF transmission signal.

[0012] In one of the embodiments, before the processing component calibrates the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase respectively corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel, the processing component is also used to: obtain each total RF transmission channel generated after each RF coil transmission channel is connected to each system RF transmission channel; obtain the FID signal and / or image corresponding to each total RF transmission channel, and determine the amplitude and phase corresponding to each FID signal and / or image; input the amplitude and phase corresponding to each FID signal and / or image into a preset algorithm model to obtain the amplitude gain and phase corresponding to each RF coil transmission channel, and the amplitude gain and phase corresponding to each system RF transmission channel.

[0013] In a second aspect, a method for correcting a radio frequency transmission signal is provided, which is applied to the above-mentioned nuclear magnetic resonance system, and the method includes: determining the system radio frequency transmission channels and radio frequency coil transmission channels that are plugged into each other among multiple system radio frequency transmission channels and multiple radio frequency coil transmission channels included in the nuclear magnetic resonance system; calibrating the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the system radio frequency transmission channels and radio frequency coil transmission channels that are plugged into each other, and the total radio frequency transmission channel is composed of the system radio frequency transmission channels and radio frequency coil transmission channels that are plugged into each other.

[0014] In a third aspect, a radio frequency transmission signal correction device is provided, the device comprising:

[0015] A determination module, used to determine, among a plurality of system radio frequency transmission channels and a plurality of radio frequency coil transmission channels included in the nuclear magnetic resonance system, system radio frequency transmission channels and radio frequency coil transmission channels that are plugged into each other;

[0016] The calibration module is used to calibrate the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other; the total RF transmission channel is composed of the system RF transmission channel and the RF coil transmission channel that are plugged into each other.

[0017] In a fourth aspect, a medical device is provided, comprising a memory and a processor, wherein the memory stores a computer program, the medical device comprises a medical device body, a nuclear magnetic resonance system, and a scanning bed, and when the processor executes the computer program, a radio frequency transmission signal correction method as described in any one of the above second aspects is implemented.

[0018] The above-mentioned nuclear magnetic resonance system, radio frequency transmission signal correction method, device and medical equipment, the nuclear magnetic resonance system includes a processing component, multiple system radio frequency transmission channels and at least one radio frequency transmission coil, wherein the radio frequency transmission coil includes at least one radio frequency coil transmission channel; each system radio frequency transmission channel can be plugged into any radio frequency coil transmission channel, and can be unplugged from the plugged radio frequency coil transmission channel; the processing component is used to calibrate the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the mutually plugged system radio frequency transmission channel and radio frequency coil transmission channel; the total radio frequency transmission channel is composed of the mutually plugged system radio frequency transmission channel and radio frequency coil transmission channel. The radio frequency coil transmission channel in the radio frequency transmission coil in the above-mentioned nuclear magnetic resonance system is plugged in and out with the system radio frequency transmission channel, so that at least one radio frequency transmission coil can be selected according to the patient's condition and actual needs, and at least one radio frequency coil transmission channel in the radio frequency transmission coil is connected to the system radio frequency transmission channel. Thereby, the flexibility of the use of the nuclear magnetic resonance system is improved, the nuclear magnetic resonance scanning workflow is optimized, and time is saved. In addition, the processing components in the nuclear magnetic resonance system calibrate the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other. Therefore, when the scanner connects the system RF transmission channel and the RF coil transmission channel according to the scanning requirements, it can be directly scanned and used to achieve circular polarization of RF transmission, thereby improving transmission efficiency and image quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a nuclear magnetic resonance system in one embodiment;

[0020] Figure 2 A schematic diagram of a flow chart of determining the amplitude gain and phase corresponding to each radio frequency coil transmission channel and the amplitude gain and phase corresponding to each system radio frequency transmission channel in a nuclear magnetic resonance system in an embodiment;

[0021] Figure 3 A schematic diagram of a flow chart of a radio frequency transmission signal correction step in one embodiment;

[0022] Figure 4 FIG. 1 is a flow chart of a method for calibrating a radio frequency transmission signal in another embodiment. Figure 1 ;

[0023] Figure 5 FIG. 1 is a flow chart of a method for calibrating a radio frequency transmission signal in another embodiment. Figure 2 ;

[0024] Figure 6 FIG. 1 is a flow chart of a method for calibrating a radio frequency transmission signal in another embodiment. Figure 3 ;

[0025] Figure 7 FIG. 1 is a flow chart of a method for calibrating a radio frequency transmission signal in another embodiment. Figure 4 ;

[0026] Figure 8 The structure frame of a radio frequency transmission signal correction device in one embodiment is shown in FIG. Figure 1 ;

[0027] Fig. 9 The structure frame of a radio frequency transmission signal correction device in one embodiment is shown in FIG. Figure 2 ;

[0028] Fig.10 The structure frame of a radio frequency transmission signal correction device in one embodiment is shown in FIG. Figure 3 ;

[0029] Fig.11 is an internal structure diagram when the computer device is a server in one embodiment;

[0030] Fig.12 The figure is an internal structure diagram when the computer device is a terminal in one embodiment. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] The technical solution of the present application and how the technical solution of the present application solves the technical problem are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0033] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0034] The present application provides a nuclear magnetic resonance system, such as Figure 1 As shown, the nuclear magnetic resonance system includes a processing component, a plurality of system radio frequency transmission channels and at least one radio frequency transmission coil, wherein the radio frequency transmission coil includes at least one radio frequency coil transmission channel.

[0035] In the embodiment of the present application, the processing component included in the nuclear magnetic resonance system may be a computer device, which may be but is not limited to various personal computers, laptops, smart phones, tablet computers, portable wearable devices, etc.

[0036] In order to facilitate the nuclear magnetic resonance scanning of patients, multiple system radio frequency transmission channels and at least one radio frequency transmission coil can be guaranteed in the nuclear magnetic resonance system, wherein the number of radio frequency transmission coils is not specifically limited in this application. In addition, the radio frequency transmission coil can be used to scan the patient's head, abdomen, legs and other parts, and the embodiment of this application does not specifically limit the role of the radio frequency transmission coil.

[0037] Each system radio frequency transmission channel can be plugged into any radio frequency coil transmission channel and can be unplugged from the plugged radio frequency coil transmission channel.

[0038] When performing a nuclear magnetic resonance scan on a patient, each radio frequency coil transmitting channel can be plugged into any system radio frequency transmitting channel, and the nuclear magnetic resonance scan of the patient is performed using the mutually plugged system radio frequency transmitting channels and radio frequency coil transmitting channels.

[0039] It should be noted that when performing an MRI scan on a patient, at least one RF transmitting coil can be selected according to the patient's condition and actual needs, wherein at least one RF coil transmitting channel in each RF transmitting coil is connected to the system RF transmitting channel.

[0040] After completing the nuclear magnetic resonance scanning of the patient, each radio frequency coil transmitting channel can be removed from the radio frequency transmitting channel of the system, so as to facilitate the storage of each radio frequency transmitting coil.

[0041] The processing component is used to calibrate the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel plugged into each other.

[0042] The total RF transmission channel is composed of a system RF transmission channel and a RF coil transmission channel which are plugged into each other.

[0043] Since each system RF transmission channel and RF coil transmission channel has corresponding amplitude gain and phase, when different system RF transmission channels are connected to different RF coil transmission channels, the amplitude gain and phase corresponding to the total RF transmission channel composed of the mutually plugged system RF transmission channels and RF coil transmission channels will be different. Therefore, in order to achieve circular polarization of RF transmission, it is necessary to calibrate the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase corresponding to the mutually plugged system RF transmission channels and RF coil transmission channels.

[0044] Specifically, the nuclear magnetic resonance system may also include a storage component, in which the amplitude gain and phase corresponding to each system radio frequency transmission channel and each radio frequency coil transmission channel are stored. The processing component may obtain the amplitude gain and phase corresponding to the mutually plugged system radio frequency transmission channel and radio frequency coil transmission channel from the storage component, and then calibrate the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase corresponding to the mutually plugged system radio frequency transmission channel and radio frequency coil transmission channel.

[0045] The above-mentioned nuclear magnetic resonance system includes a processing component, a plurality of system radio frequency transmission channels and at least one radio frequency transmission coil, wherein the radio frequency transmission coil includes at least one radio frequency coil transmission channel; each system radio frequency transmission channel can be plugged into any radio frequency coil transmission channel and can be unplugged from the plugged radio frequency coil transmission channel; the processing component is used to calibrate the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the mutually plugged system radio frequency transmission channel and the radio frequency coil transmission channel; the total radio frequency transmission channel is composed of the mutually plugged system radio frequency transmission channel and the radio frequency coil transmission channel. The radio frequency coil transmission channel in the radio frequency transmission coil of the above-mentioned nuclear magnetic resonance system is plugged in and out with the system radio frequency transmission channel, so that at least one radio frequency transmission coil can be selected according to the patient's condition and actual needs, and at least one radio frequency coil transmission channel in the radio frequency transmission coil is connected to the system radio frequency transmission channel. Thereby, the flexibility of the use of the nuclear magnetic resonance system is improved, the nuclear magnetic resonance scanning workflow is optimized, and time is saved. In addition, the processing component in the nuclear magnetic resonance system calibrates the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the mutually plugged system radio frequency transmission channel and the radio frequency coil transmission channel. Therefore, after the scanner connects the system RF transmission channel and the RF coil transmission channel according to the scanning requirements, the scanner can directly scan and use and realize the circular polarization of the RF transmission, thereby improving the transmission efficiency and image quality.

[0046] In an optional embodiment of the present application, the processing component is specifically used to calibrate the amplitude of the RF transmission signal emitted by the total RF transmission channel according to the amplitude gains respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other.

[0047] Specifically, the nuclear magnetic resonance system may further include a storage component, in which the amplitude gain and phase corresponding to each system radio frequency transmission channel and each radio frequency coil transmission channel are stored. The processing component may obtain the amplitude gain corresponding to each of the system radio frequency transmission channels and radio frequency coil transmission channels that are plugged into each other from the storage component.

[0048] The processing component can calculate the amplitude of the RF transmission signal based on the first preset algorithm according to the user's requirement for the amplitude of the target RF transmission signal and the amplitude gains corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel, and obtain the target RF transmission signal. The first preset algorithm can include at least one of addition, subtraction, multiplication, division, square, square root, and reciprocal operations.

[0049] The processing component is specifically used to calibrate the phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the phases respectively corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel that are plugged into each other.

[0050] Specifically, the nuclear magnetic resonance system may further include a storage component, in which the amplitude gain and phase corresponding to each system radio frequency transmission channel and each radio frequency coil transmission channel are stored. The processing component may obtain the phases corresponding to the system radio frequency transmission channels and radio frequency coil transmission channels that are plugged into each other from the storage component.

[0051] The processing component can calculate the phase of the RF transmission signal based on the second preset algorithm according to the user's phase requirement for the target RF transmission signal and the phases corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel, to obtain the target RF transmission signal. The second preset algorithm can include at least one of addition, subtraction, multiplication, division, square, square root and reciprocal operations.

[0052] It should be noted that, in the embodiment of the present application, the processing component may first correct the amplitude of the RF transmission signal and then correct the phase of the RF transmission signal; the processing component may first correct the phase of the RF transmission signal and then correct the amplitude of the RF transmission signal; the processing component may also correct the amplitude and phase of the RF transmission signal at the same time. The implementation of the present application does not specifically limit the order in which the processing component corrects the amplitude and phase of the RF transmission signal.

[0053] In the embodiment of the present application, the processing component is specifically used to: calibrate the amplitude of the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel; calibrate the phase of the RF transmission signal emitted by the total RF transmission channel according to the phase corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel. Thus, the RF transmission signal after amplitude calibration and phase calibration can achieve circular polarization of RF transmission, thereby improving transmission efficiency and image quality.

[0054] In an optional embodiment of the present application, the total RF transmission channel includes multiple processing components, which are specifically used to: obtain the amplitude-gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels; calibrate the amplitude of the RF transmission signal emitted by each total RF transmission channel according to the amplitude-gain relationship and the amplitude gain corresponding to each total RF transmission channel.

[0055] Specifically, when multiple RF coil transmission channels are connected to multiple system RF transmission channels to form multiple total RF transmission channels, in order to ensure that the quality of images generated using the RF transmission signals emitted by each total RF transmission channel is high, users usually input the amplitude gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels into the processing component according to actual conditions.

[0056] For example, the amplitude gain relationship between the RF transmission signals emitted by multiple total RF transmission channels can be: the amplitude gain between the RF transmission signals emitted by multiple total RF transmission channels is consistent; the amplitude gain relationship between the RF transmission signals emitted by multiple total RF transmission channels can also be: the amplitude gain ratio between total RF transmission channel 1 and total RF transmission channel 2 is 1:2. The embodiment of the present application does not specifically limit the amplitude gain relationship between the RF transmission signals emitted by multiple total RF transmission channels.

[0057] Specifically, after receiving the amplitude-gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels input by the user, the processing component can use the third preset algorithm to correct the RF transmission signals emitted by each total RF transmission channel according to the amplitude-gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels and the amplitude gain corresponding to each total RF transmission channel, so as to obtain multiple target RF transmission signals, and then use the multiple target RF transmission signals to generate a target image. The third preset algorithm may include at least one of addition, subtraction, multiplication, division, square, square root, and reciprocal operations.

[0058] Exemplarily, the number of total RF transmission channels is 2, and total RF transmission channel 1 is composed of system RF transmission channel 1 and RF coil transmission channel 1 in RF transmission coil A; total RF transmission channel 2 is composed of system RF transmission channel 2 and RF coil transmission channel 2 in RF transmission coil A. The amplitude gain corresponding to system RF transmission channel 1 is C1, and the amplitude gain corresponding to RF coil transmission channel 1 in RF transmission coil A is C2, then the amplitude gain corresponding to total RF transmission channel 1 is C1*C2; the amplitude gain corresponding to system RF transmission channel 2 is E1, and the amplitude gain corresponding to RF coil transmission channel 2 in RF transmission coil A is E2, then the amplitude gain corresponding to total RF transmission channel 2 is E1*E2.

[0059] Assume that the amplitude gain relationship between the radio frequency transmission signals emitted by the plurality of total radio frequency transmission channels can be: the amplitude gain ratio between the total radio frequency transmission channels 1 and 2 is 1:2.

[0060] Then the amplitude of the RF transmission signal emitted by the total RF transmission channel 1 is multiplied by the inverse of C1*C2, that is ; The amplitude of the RF transmission signal emitted by the total RF transmission channel 2 is multiplied by 2 times the inverse of E1*E2, that is, , so that the amplitude gain ratio between the RF transmission signals emitted by the total RF transmission channels 1 and 2 is 1:2.

[0061] The processing component is specifically used to: obtain the phase relationship between the radio frequency transmission signals emitted by multiple total radio frequency transmission channels; and calibrate the phase of the radio frequency transmission signal emitted by each total radio frequency transmission channel according to the phase relationship and the phase corresponding to each total radio frequency transmission channel.

[0062] Specifically, when multiple RF coil transmission channels are connected to the system RF transmission channel to form multiple total RF transmission channels, in order to ensure that the quality of images generated using the RF transmission signals emitted by each total RF transmission channel is high, users usually input the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels into the processing component according to actual conditions.

[0063] For example, the phase relationship between the RF transmission signals emitted by multiple total RF transmission channels can be: the phases of the RF transmission signals emitted by multiple total RF transmission channels are consistent; the phase relationship between the RF transmission signals emitted by multiple total RF transmission channels can also be: the phase difference between total RF transmission channel 1 and total RF transmission channel 2 is 90 degrees. The embodiment of the present application does not specifically limit the phase relationship between the RF transmission signals emitted by multiple total RF transmission channels.

[0064] Specifically, after receiving the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels input by the user, the processing component can use the fourth preset algorithm to correct the RF transmission signals emitted by each total RF transmission channel according to the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels and the phases corresponding to each total RF transmission channel, so as to obtain multiple target RF transmission signals, and then use the multiple target RF transmission signals to generate a target image. The fourth preset algorithm may include at least one of addition, subtraction, multiplication, division, square, square root and reciprocal operations.

[0065] In an embodiment of the present application, the total RF transmission channel includes multiple processing components, which are specifically used to: obtain the amplitude-gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels; calibrate the amplitude of the RF transmission signal emitted by each total RF transmission channel according to the amplitude-gain relationship and the amplitude gain corresponding to each total RF transmission channel. Obtain the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels; calibrate the phase of the RF transmission signal emitted by each total RF transmission channel according to the phase relationship and the phase corresponding to each total RF transmission channel. The processing component obtains the amplitude-gain relationship and the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels, and calibrates the amplitude and phase of the RF transmission signal emitted by each total RF transmission channel according to the amplitude gain and phase corresponding to each total RF transmission channel. As a result, the RF transmission signal emitted by each total RF transmission channel after calibration not only meets the needs of users, but also realizes the circular polarization of RF transmission, thereby improving transmission efficiency and image quality.

[0066] In an optional embodiment of the present application, the processing component is specifically used to: when the amplitude gain relationship is that the amplitude gain of the RF transmission signals emitted by each total RF transmission channel is consistent, multiply the amplitude of each RF transmission signal by the corresponding amplitude calibration value.

[0067] The amplitude calibration value is the reciprocal of the product of the amplitude gains corresponding to the mutually plugged system RF transmission channels and RF coil transmission channels corresponding to each total RF transmission channel.

[0068] Specifically, when the amplitude gain relationship is that the amplitude gains of the RF transmission signals emitted by each total RF transmission channel are consistent, the processing component obtains the amplitude gains corresponding to each total RF transmission channel respectively, wherein the amplitude gains corresponding to each total RF transmission channel are the products of the amplitude gains corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0069] In order to ensure that the amplitudes of the RF transmission signals emitted by the plurality of total RF transmission channels are consistent, the processing component may multiply the amplitude of the RF transmission signal emitted by each total RF transmission channel by a corresponding amplitude calibration value.

[0070] Exemplarily, the number of total RF transmission channels is 2, and total RF transmission channel 1 is composed of system RF transmission channel 1 and RF coil transmission channel 1 in RF transmission coil A; total RF transmission channel 2 is composed of system RF transmission channel 2 and RF coil transmission channel 2 in RF transmission coil A. The amplitude gain corresponding to system RF transmission channel 1 is C1, and the amplitude gain corresponding to RF coil transmission channel 1 in RF transmission coil A is C2, then the amplitude gain corresponding to total RF transmission channel 1 is C1*C2; the amplitude gain corresponding to system RF transmission channel 2 is E1, and the amplitude gain corresponding to RF coil transmission channel 2 in RF transmission coil A is E2, then the amplitude gain corresponding to total RF transmission channel 2 is E1*E2.

[0071] Assume that the amplitude gain relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels can be: the amplitude between the total radio frequency transmission channel 1 and the total radio frequency transmission channel 2 is consistent.

[0072] Then the amplitude of the RF transmission signal emitted by the total RF transmission channel 1 is multiplied by the inverse of C1*C2, that is ; The amplitude of the RF transmission signal emitted by the total RF transmission channel 2 is multiplied by the reciprocal of E1*E2, that is, , so that the amplitudes of the RF transmission signals emitted by the total RF transmission channel 1 and the total RF transmission channel 2 are consistent.

[0073] The processing component is specifically used to: when the phase relationship is that the phases of the RF transmission signals emitted by each total RF transmission channel are consistent, subtract the corresponding phase calibration value from the phase of each RF transmission signal, and the phase calibration value is the sum of the phases corresponding to the mutually plugged system RF transmission channels and RF coil transmission channels corresponding to each total RF transmission channel.

[0074] Specifically, when the phase relationship is that the phases of the RF transmission signals emitted by each total RF transmission channel are consistent, the processing component respectively obtains the phases corresponding to each total RF transmission channel, wherein the phases corresponding to each total RF transmission channel are the sum of the phases corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0075] In order to ensure that the phases of the RF transmission signals emitted by the multiple total RF transmission channels are consistent, the processing component may subtract the corresponding phase calibration value from the phase of the RF transmission signal emitted by each total RF transmission channel.

[0076] Exemplarily, the number of total RF transmission channels is 2, and total RF transmission channel 1 is composed of system RF transmission channel 1 and RF coil transmission channel 1 in RF transmission coil A; total RF transmission channel 2 is composed of system RF transmission channel 2 and RF coil transmission channel 2 in RF transmission coil A. The phase corresponding to system RF transmission channel 1 is D1, and the phase corresponding to RF coil transmission channel 1 in RF transmission coil A is D2, then the phase corresponding to total RF transmission channel 1 is D1+D2; the phase corresponding to system RF transmission channel 2 is F1, and the phase corresponding to RF coil transmission channel 2 in RF transmission coil A is F2, then the phase corresponding to total RF transmission channel 2 is F1+F2.

[0077] Assume that the phase relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels can be: the phase between the total radio frequency transmission channel 1 and the total radio frequency transmission channel 2 is consistent.

[0078] The phase of the RF transmission signal emitted by the total RF transmission channel 1 is subtracted from the sum of D1+D2; the phase of the RF transmission signal emitted by the total RF transmission channel 2 is subtracted from the sum of F1+F2, so that the phases of the RF transmission signals emitted by the total RF transmission channel 1 and the total RF transmission channel 2 are consistent.

[0079] In the embodiment of the present application, when the amplitude gain relationship is that the amplitude gain and phase of the RF transmission signal emitted 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 corresponding phase calibration value from the phase of each RF transmission signal. This ensures that the amplitude gain and phase of the RF transmission signal emitted by each total RF transmission channel are consistent, and realizes the correction of the RF during scanning, which not only meets the needs of users, but also realizes the circular polarization of RF transmission, thereby improving the transmission efficiency and image quality.

[0080] In an optional embodiment of the present application, before the processing component calibrates the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase respectively corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel, the processing component is further used to:

[0081] After each radio frequency coil transmission channel is connected with each system radio frequency transmission channel, each total radio frequency transmission channel generated is obtained.

[0082] Specifically, after each RF coil transmission channel is connected to each system RF transmission channel, each total RF transmission channel may be generated. The processing component may record and store the total RF transmission channel after each RF coil transmission channel is connected to each system RF transmission channel.

[0083] The FID signal or / and image corresponding to each total RF transmission channel is obtained, and the amplitude and phase corresponding to each FID signal or / and image are determined.

[0084] Specifically, the processing component can generate FID signals and / or images using the RF transmission signals transmitted by each total RF transmission channel. The processing component determines the amplitude and phase corresponding to each FID signal and / or image based on a preset model and / or algorithm.

[0085] The amplitude and phase corresponding to each FID signal and / or image are input into a preset algorithm model to obtain the amplitude gain and phase corresponding to each RF coil transmission channel and the amplitude gain and phase corresponding to each system RF transmission channel.

[0086] Specifically, the processing component inputs the amplitude and phase corresponding to each FID signal and / or image into a preset algorithm model, wherein 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.

[0087] The processing component inputs the amplitude and phase corresponding to each FID signal and / or image into a preset algorithm model to obtain the amplitude gain and phase corresponding to each RF coil transmission channel, as well as the amplitude gain and phase corresponding to each system RF transmission channel.

[0088] For example, an achievable algorithm model is used as an example for explanation. Assume that a nuclear magnetic resonance system includes two system RF transmission channels, namely system RF transmission channel 1 and system RF transmission channel 2, and an RF transmission coil, wherein the RF transmission coil includes two RF coil transmission channels, namely RF coil transmission channel 1 and RF coil transmission channel 2. Figure 2 shown.

[0089] In the first step, the system RF transmission channel 1 is connected to the RF coil transmission channel 1, and the system RF transmission channel 2 is connected to the RF coil transmission channel 2. Only the system RF transmission channel 1 and the RF coil transmission channel 1 are used for RF transmission, and magnetic resonance scanning is performed to obtain FID signals and / or images. The amplitude of the FID signal and / or image is recorded as A1, and the phase is recorded as P1. Only the system RF transmission channel 2 and the RF coil transmission channel 2 are used for RF transmission, and magnetic resonance scanning is performed to obtain FID signals and / or images. The amplitude of the FID signal and / or image is recorded as A2, and the phase is recorded as P2.

[0090] In the second step, the system RF transmission channel 1 is connected to the RF coil transmission channel 2, and the system RF transmission channel 2 is connected to the RF coil transmission channel 1. Only the system RF transmission channel 1 and the RF coil transmission channel 2 are used for RF transmission, and magnetic resonance scanning is performed to obtain FID signals and / or images. The amplitude of the FID signal and / or image is recorded as A3, and the phase is recorded as P3. Only the system RF transmission channel 2 and the RF coil transmission channel 1 are used for magnetic resonance scanning to obtain FID signals and / or images. The amplitude of the FID signal or image is recorded as A4, and the phase is recorded as P4.

[0091] Specifically, as shown in Table 1:

[0092]

[0093] Assume that the amplitude gain of system RF transmission channel 1 is C1, and the phase is D1; ​​the amplitude gain of system RF transmission channel 2 is C2, and the phase is D2; the amplitude gain of coil RF transmission channel 1 is E1, and the phase is F1; the amplitude gain of coil RF transmission channel 2 is E2, and the phase is F2.

[0094] Specifically, as shown in Table 2:

[0095]

[0096] If the amplitude and phase of the RF energy transmitted each time are consistent before entering the RF transmission channel after RF amplification, the amplitude of the image and / or FID signal is affected by the amplitude gain of the system RF transmission channel and the coil RF transmission channel, and it can be obtained that:

[0097] (1)

[0098] (2)

[0099] Using (1) x (2), we can get ,thereby, ;

[0100] Using (1) / (2), we can get

[0101] The phase of the image and / or FID signal is affected by the phase of the system RF transmission channel and the coil RF transmission channel, and it can be obtained:

[0102]

[0103] Using (3)+(4), we can get: ,thereby

[0104] Using (3)-(4), we can get: .

[0105] Take any one of the system RF transmission channels and any one of the RF transmission coil channels as the reference. In the embodiment of the present application, take the system RF transmission channel 1 and the RF coil transmission channel 1 as the reference, set the amplitude correction value of the system RF transmission channel 1 to 1, the phase correction value to 0, the amplitude correction value of the RF coil transmission channel 1 to 1, and the phase correction value to 0. The amplitude correction value of the system RF transmission channel 2 is , the phase correction value of the system RF transmission channel 2 is (P1-P2+P3-P4) / 2. The amplitude correction value of the RF coil transmission channel 2 is , the phase correction value of the RF coil transmitting channel 2 is (P1-P2-P3+P4) / 2.

[0106] In the embodiment of the present application, the processing component is also used to: obtain each total RF transmission channel generated after each RF coil transmission channel is connected to each system RF transmission channel; obtain the FID signal or / and image corresponding to each total RF transmission channel, and determine the amplitude and phase corresponding to each FID signal or / and image; input the amplitude and phase corresponding to each FID signal or / and image into a preset algorithm model to obtain the amplitude gain and phase corresponding to each RF coil transmission channel, as well as the amplitude gain and phase corresponding to each system RF transmission channel. As a result, when the amplitude and phase of the RF transmission signal emitted by each total RF transmission channel are adjusted, no additional tools are required, only the connection mode of the system RF transmission channel and the RF coil transmission channel is changed, and the magnetic resonance signals under different connection modes are obtained through magnetic resonance scanning, and the correction values ​​of the amplitude and phase of each system RF transmission channel and RF coil transmission channel can be calculated. This helps to reduce the hardware cost of system calibration and maintenance and improve the convenience of operation.

[0107] See also Figure 3 An optional embodiment of the present application provides a radio frequency transmission signal correction method, characterized in that it is applied to the above-mentioned nuclear magnetic resonance system, and the method includes:

[0108] Step 301: The nuclear magnetic resonance system determines a system radio frequency transmission channel and a radio frequency coil transmission channel that are plugged into each other among a plurality of system radio frequency transmission channels and a plurality of radio frequency coil transmission channels included in the nuclear magnetic resonance system.

[0109] Step 302: The nuclear magnetic resonance system calibrates the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel respectively connected to each other.

[0110] The total RF transmission channel is composed of a system RF transmission channel and a RF coil transmission channel which are plugged into each other.

[0111] In an optional embodiment of the present application, Figure 4 As shown, the "calibrating the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase respectively corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel" in the above step 302 may include the following steps:

[0112] Step 401: The nuclear magnetic resonance system calibrates the amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gains corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel respectively connected to each other.

[0113] Step 402: The nuclear magnetic resonance system calibrates the phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the phases corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel respectively connected to each other.

[0114] In an optional embodiment of the present application, the total RF transmission channel includes multiple, such as Figure 5 As shown, the above step 401 of "calibrating the amplitude of the RF transmission signal emitted by the total RF transmission channel according to the amplitude gains respectively corresponding to the system RF transmission channel and the RF coil transmission channel plugged into each other" may include the following steps:

[0115] Step 501: The nuclear magnetic resonance system obtains the amplitude gain relationship between the radio frequency transmission signals emitted by a plurality of total radio frequency transmission channels.

[0116] Step 502: The nuclear magnetic resonance system calibrates the amplitude of the radio frequency transmission signal emitted 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.

[0117] In an optional embodiment of the present application, the total RF transmission channel includes multiple, such as Figure 6 As shown, the above step 402 of “calibrating the phase of the RF transmission signal emitted by the total RF transmission channel according to the phases respectively corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel” may include the following steps:

[0118] Step 601: The nuclear magnetic resonance system obtains a phase relationship between radio frequency transmission signals emitted by a plurality of total radio frequency transmission channels.

[0119] Step 602: The nuclear magnetic resonance system calibrates the phase of the radio frequency transmission signal emitted by each total radio frequency transmission channel according to the phase relationship and the phase corresponding to each total radio frequency transmission channel.

[0120] In an optional embodiment of the present application, the step 502 of “calibrating the amplitude of the RF transmission signal emitted by each total RF transmission channel according to the amplitude gain relationship and the amplitude gain corresponding to each total RF transmission channel” may include the following contents:

[0121] When the amplitude gain relationship is that the amplitude gain of the RF transmission signals emitted by each total RF transmission channel is consistent, the amplitude of each RF transmission signal is multiplied by the corresponding amplitude calibration value, and the amplitude calibration value is the reciprocal of the product of the amplitude gains corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0122] In an optional embodiment of the present application, the “calibrating the phase of the RF transmission signal emitted by each total RF transmission channel according to the phase relationship and the phases corresponding to each total RF transmission channel” in the above step 602 may include the following contents:

[0123] When the phase relationship is that the phases of the RF transmission signals emitted by each total RF transmission channel are consistent, the phase of each RF transmission signal is subtracted from the corresponding phase calibration value, and the phase calibration value is the sum of the phases corresponding to the mutually plugged system RF transmission channels and RF coil transmission channels corresponding to each total RF transmission channel.

[0124] In an optional embodiment of the present application, Figure 7 As shown, before the step 202 of "calibrating the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase respectively corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel", the RF transmission signal calibration method may further include the following steps:

[0125] Step 701: The nuclear magnetic resonance system obtains each total radio frequency transmission channel generated after each radio frequency coil transmission channel is connected with each system radio frequency transmission channel.

[0126] Step 702: The nuclear magnetic resonance system acquires the FID signal or / and image corresponding to each total radio frequency transmission channel, and determines the amplitude and phase corresponding to each FID signal or / and image.

[0127] In step 703, the nuclear magnetic resonance system inputs the amplitude and phase corresponding to each FID signal and / or image into a preset algorithm model to obtain the amplitude gain and phase corresponding to each RF coil transmission channel and the amplitude gain and phase corresponding to each system RF transmission channel.

[0128] The specific definition of the radio frequency transmission signal correction method can be found in the above definition of the nuclear magnetic resonance system, which will not be repeated here. The radio frequency transmission signal correction method adopts the nuclear magnetic resonance system provided by the above embodiment, so the radio frequency transmission signal correction method has all the beneficial effects of the nuclear magnetic resonance system, which will not be repeated here.

[0129] It should be understood that although Figure 3-7 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 3-7 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0130] In one embodiment of the present application, Figure 8 As shown, a radio frequency transmission signal correction device 8000 is provided, including: a determination module 8010 and a calibration module 8020, wherein:

[0131] The determination module 8010 is used to determine the system radio frequency transmission channels and radio frequency coil transmission channels that are plugged into each other among the multiple system radio frequency transmission channels and the multiple radio frequency coil transmission channels included in the nuclear magnetic resonance system;

[0132] The calibration module 8020 is used to calibrate the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other; the total RF transmission channel is composed of the system RF transmission channel and the RF coil transmission channel that are plugged into each other.

[0133] In one embodiment of the present application, Fig. 9 As shown, the calibration module 8020 includes an amplitude calibration unit 8021 and a phase calibration unit 8022, wherein:

[0134] The amplitude calibration unit 8021 is used to calibrate the amplitude of the RF transmission signal emitted by the total RF transmission channel according to the amplitude gains respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other.

[0135] The phase calibration unit 8022 is used to calibrate the phase of the RF transmission signal emitted by the total RF transmission channel according to the phases respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other.

[0136] In one embodiment of the present application, the total RF transmission channel includes multiple, and the above-mentioned amplitude calibration unit 8021 is specifically used to obtain the amplitude-gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels; according to the amplitude-gain relationship and the amplitude gains corresponding to each total RF transmission channel, the amplitude of the RF transmission signal emitted by each total RF transmission channel is calibrated.

[0137] In one embodiment of the present application, the total RF transmission channel includes multiple, and the above-mentioned phase calibration unit 8022 is specifically used to obtain the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels; according to the phase relationship and the phase corresponding to each total RF transmission channel, the phase of the RF transmission signal emitted by each total RF transmission channel is calibrated.

[0138] In one embodiment of the present application, the amplitude calibration unit 8021, when the amplitude gain relationship is that the amplitude gain of the RF transmission signals emitted by each total RF transmission channel is consistent, multiplies the amplitude of each RF transmission signal by the corresponding amplitude calibration value, and the amplitude calibration value is the reciprocal of the product of the amplitude gains corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0139] In one embodiment of the present application, the above-mentioned phase calibration unit 8022, when the phase relationship is that the phases of the RF transmission signals emitted by each total RF transmission channel are consistent, subtracts the corresponding phase calibration value from the phase of each RF transmission signal. The phase calibration value is the sum of the phases corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0140] In one embodiment of the present application, Fig.10 As shown, the radio frequency transmission signal correction device 8000 further includes:

[0141] The first acquisition module 8030 is used to acquire each total radio frequency transmission channel generated after each radio frequency coil transmission channel is connected with each system radio frequency transmission channel.

[0142] The second acquisition module 8040 is used to acquire the FID signal and / or image corresponding to each total RF transmission channel, and determine the amplitude and phase corresponding to each FID signal and / or image.

[0143] The input module 8050 is used to input the amplitude and phase corresponding to each FID signal or / and image into a preset algorithm model to obtain the amplitude gain and phase corresponding to each RF coil transmission channel and the amplitude gain and phase corresponding to each system RF transmission channel.

[0144] For the specific definition of the radio frequency transmission signal correction device, please refer to the definition of the radio frequency transmission signal correction method above, which will not be repeated here. Each module in the above radio frequency transmission signal correction device can be implemented in whole or in part by software, hardware and a combination thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0145] In one embodiment, a medical device is provided. The medical device may be a server, and its internal structure diagram may be as follows: Fig.11 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile 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 the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store radio frequency transmission signal correction data. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a radio frequency transmission signal correction method is implemented.

[0146] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Fig.12 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile 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 the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a radio frequency transmission signal correction method is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0147] Those skilled in the art will understand that Fig.11 and Fig.12The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0148] In one embodiment, a medical device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the medical device includes a medical device body, a nuclear magnetic resonance system, and a scanning bed. When the processor executes the computer program, the following steps are implemented: calibrating a radio frequency transmission signal emitted by a total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel that are plugged into each other; the total radio frequency transmission channel is composed of the system radio frequency transmission channel and the radio frequency coil transmission channel that are plugged into each other.

[0149] In one embodiment, when the processor executes the computer program, the following steps are further implemented: the amplitude of the RF transmission signal emitted by the total RF transmission channel is calibrated according to the amplitude gains respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other; the phase of the RF transmission signal emitted by the total RF transmission channel is calibrated according to the phases respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other.

[0150] In one embodiment, the total RF transmission channel includes multiple, and the processor further implements the following steps when executing the computer program: obtaining the amplitude gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels; and calibrating the amplitude of the RF transmission signal emitted by each total RF transmission channel according to the amplitude gain relationship and the amplitude gain corresponding to each total RF transmission channel.

[0151] In one embodiment, the total RF transmission channel includes multiple, and the processor executes the computer program to further implement the following steps: obtaining the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels; and calibrating the phase of the RF transmission signal emitted by each total RF transmission channel according to the phase relationship and the phase corresponding to each total RF transmission channel.

[0152] In one embodiment, when the processor executes the computer program, the following steps are further implemented: when the amplitude gain relationship is that the amplitude gain of the RF transmission signals emitted by each total RF transmission channel is consistent, the amplitude of each RF transmission signal is multiplied by the corresponding amplitude calibration value, and the amplitude calibration value is the reciprocal of the product of the amplitude gains corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0153] In one embodiment, when the processor executes the computer program, the following steps are also implemented: a processing component is specifically used to: when the phase relationship is that the phases of the RF transmission signals emitted by each total RF transmission channel are consistent, subtract the corresponding phase calibration value from the phase of each RF transmission signal, and the phase calibration value is the sum of the phases corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0154] In one embodiment, when the processor executes the computer program, the following steps are further implemented: obtaining each total RF transmission channel generated after each RF coil transmission channel is connected to each system RF transmission channel; obtaining the FID signal or / and image corresponding to each total RF transmission channel, and determining the amplitude and phase corresponding to each FID signal or / and image; inputting the amplitude and phase corresponding to each FID signal or / and image into a preset algorithm model to obtain the amplitude gain and phase corresponding to each RF coil transmission channel, and the amplitude gain and phase corresponding to each system RF transmission channel.

[0155] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: calibrating the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel plugged into each other; the total radio frequency transmission channel is composed of the system radio frequency transmission channel and the radio frequency coil transmission channel plugged into each other.

[0156] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: the amplitude of the RF transmission signal emitted by the total RF transmission channel is calibrated according to the amplitude gains respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other; the phase of the RF transmission signal emitted by the total RF transmission channel is calibrated according to the phases respectively corresponding to the system RF transmission channel and the RF coil transmission channel that are plugged into each other.

[0157] In one embodiment, the total RF transmission channel includes multiple, and when the computer program is executed by the processor, the following steps are also implemented: obtaining the amplitude gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels; and calibrating the amplitude of the RF transmission signal emitted by each total RF transmission channel according to the amplitude gain relationship and the amplitude gain corresponding to each total RF transmission channel.

[0158] In one embodiment, the total RF transmission channel includes multiple, and when the computer program is executed by the processor, the following steps are also implemented: obtaining the phase relationship between the RF transmission signals emitted by the multiple total RF transmission channels; and calibrating the phase of the RF transmission signal emitted by each total RF transmission channel according to the phase relationship and the phase corresponding to each total RF transmission channel.

[0159] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: when the amplitude gain relationship is that the amplitude gain of the RF transmission signals emitted by each total RF transmission channel is consistent, the amplitude of each RF transmission signal is multiplied by the corresponding amplitude calibration value, and the amplitude calibration value is the reciprocal of the product of the amplitude gains corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0160] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: a processing component is specifically used to: when the phase relationship is that the phases of the RF transmission signals emitted by each total RF transmission channel are consistent, subtract the corresponding phase calibration value from the phase of each RF transmission signal, and the phase calibration value is the sum of the phases corresponding to the mutually plugged system RF transmission channels and the RF coil transmission channels corresponding to each total RF transmission channel.

[0161] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: obtaining each total RF transmission channel generated after each RF coil transmission channel is connected to each system RF transmission channel; obtaining the FID signal or / and image corresponding to each total RF transmission channel, and determining the amplitude and phase corresponding to each FID signal or / and image; inputting the amplitude and phase corresponding to each FID signal or / and image into a preset algorithm model to obtain the amplitude gain and phase corresponding to each RF coil transmission channel, and the amplitude gain and phase corresponding to each system RF transmission channel.

[0162] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0163] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0164] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A nuclear magnetic resonance system, characterized in that: The nuclear magnetic resonance system comprises a processing component, a system radio frequency transmission channel 1 and a system radio frequency transmission channel 2, and a radio frequency coil transmission channel 1 and a coil radio frequency transmission channel 2; the system radio frequency transmission channel 1 is connected to the radio frequency coil transmission channel 1, and the system radio frequency transmission channel 2 is connected to the radio frequency coil transmission channel 2; when the system radio frequency transmission channel 1 is connected to the radio frequency coil transmission channel 2, the system radio frequency transmission channel 2 is connected to the radio frequency coil transmission channel 1; The processing component is used to: After the radio frequency coil transmission channel 1 is connected to the system radio frequency transmission channel 1, the amplitude gain of the corresponding total radio frequency transmission channel 1 is obtained; After the radio frequency coil transmission channel 2 is connected to the system radio frequency transmission channel 2, the amplitude gain of the corresponding total radio frequency transmission channel 2 is obtained; After the radio frequency coil transmission channel 1 is connected to the system radio frequency transmission channel 2, the amplitude gain of the corresponding total radio frequency transmission channel 3 is obtained; After the radio frequency coil transmission channel 2 is connected to the system radio frequency transmission channel 1, the amplitude gain of the corresponding total radio frequency transmission channel 4 is obtained; Based on the amplitude gains corresponding to the total RF transmission channel 1, the total RF transmission channel 2, the total RF transmission channel 3 and the total RF transmission channel 4, respectively, the amplitude gains corresponding to the system RF transmission channel 1, the system RF transmission channel 2, the RF coil transmission channel 1 and the RF transmission channel 2 are obtained; or, The processing component is further used for: After the radio frequency coil transmission channel 1 is connected to the system radio frequency transmission channel 1, the phase of the corresponding total radio frequency transmission channel 1 is obtained; After the radio frequency coil transmission channel 2 is connected to the system radio frequency transmission channel 2, the phase of the corresponding total radio frequency transmission channel 2 is obtained; After the radio frequency coil transmission channel 1 is connected to the system radio frequency transmission channel 2, the phase of the corresponding total radio frequency transmission channel 3 is obtained; After the radio frequency coil transmission channel 2 is connected to the system radio frequency transmission channel 1, the phase of the corresponding total radio frequency transmission channel 4 is obtained; Based on the phases corresponding to the total RF transmit channel 1, the total RF transmit channel 2, the total RF transmit channel 3 and the total RF transmit channel 4, the phases corresponding to the system RF transmit channel 1, the system RF transmit channel 2, the RF coil transmit channel 1 and the RF transmit channel 2 are obtained.

2. The nuclear magnetic resonance system according to claim 1, characterized in that: The total RF transmission channel 1 is composed of the system RF transmission channel 1 and the RF coil transmission channel 1; the total RF transmission channel 2 is composed of the system RF transmission channel 2 and the RF coil transmission channel 2.

3. The nuclear magnetic resonance system according to claim 2, characterized in that: The phase difference between the total RF transmission channel 1 and the total RF transmission channel 2 is 90 degrees.

4. The nuclear magnetic resonance system according to claim 2, characterized in that: The processing component is specifically used for: Calibrate the amplitude of the radio frequency transmission signal emitted 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 which are plugged into each other; The phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel is calibrated according to the phases respectively corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel which are plugged into each other.

5. The nuclear magnetic resonance system according to claim 4, characterized in that: The processing component is specifically used for: In the process of calibrating the amplitude of the RF transmission signal emitted by the total RF transmission channel, or calibrating the phase of the RF transmission signal emitted by the total RF transmission channel, the system RF transmission channel 1 and the RF coil transmission channel 1 are used as references.

6. The nuclear magnetic resonance system according to claim 5, characterized in that: The processing component is specifically used for: When the amplitude gain relationship is that the amplitude gains of the radio frequency transmission signals emitted by the total radio frequency transmission channels are consistent, the amplitude of each radio frequency transmission signal is multiplied by the corresponding amplitude calibration value.

7. The nuclear magnetic resonance system according to claim 5, characterized in that: The processing component is specifically used for: When the phase relationship is that the phases of the radio frequency transmission signals emitted by the total radio frequency transmission channels are consistent, the corresponding phase calibration value is subtracted from the phase of each radio frequency transmission signal.

8. The nuclear magnetic resonance system according to claim 5, characterized in that: Before the processing component calibrates the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase respectively corresponding to the system radio frequency transmission channel and the radio frequency coil transmission channel plugged into each other, the processing component is further used to: Acquire each total radio frequency transmission channel generated after each radio frequency coil transmission channel is connected with each system radio frequency transmission channel; Acquire the FID signal or / and image corresponding to each of the total RF transmission channels, and determine the amplitude and phase corresponding to each of the FID signal or / and image; The amplitude and phase corresponding to each of the FID signals and / or images are input into a preset algorithm model to obtain the amplitude gain and phase corresponding to each of the RF coil transmission channels, and the amplitude gain and phase corresponding to each of the system RF transmission channels.

9. A method for calibrating a radio frequency transmission signal, characterized in that: Applied in a nuclear magnetic resonance system, the nuclear magnetic resonance system includes a plurality of radio frequency coil transmission channels and a plurality of system radio frequency transmission channels, and the method includes: Determine, among the plurality of system radio frequency transmission channels and the plurality of radio frequency coil transmission channels, a system radio frequency transmission channel and a radio frequency coil transmission channel that are plugged into each other; According to the amplitude gain and phase respectively corresponding to the mutually plugged system RF transmission channel and the RF coil transmission channel, the RF transmission signal emitted by the total RF transmission channel is calibrated, the total RF transmission channel is composed of the mutually plugged system RF transmission channel and the RF coil transmission channel, and the RF transmission signal emitted by the total RF transmission channel is calibrated so that the phases between the RF transmission signals emitted by the multiple total RF transmission channels meet the preset requirements, or the amplitudes between the RF transmission signals emitted by the multiple total RF transmission channels meet the preset requirements.

10. A medical device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: The medical device includes a nuclear magnetic resonance system, and the nuclear magnetic resonance system includes multiple radio frequency coil transmission channels and multiple system radio frequency transmission channels. When the processor executes the computer program, the following steps are implemented: Before the patient undergoes an MRI scan, Determining total radio frequency transmission channels formed after connecting the radio frequency coil transmission channels and the system radio frequency transmission channels; Acquire the FID signal or / and image corresponding to each of the total RF transmission channels, and determine the amplitude and phase corresponding to each of the FID signal or / and image; Inputting the amplitude and phase corresponding to each of the FID signals and / or images into a preset algorithm model to obtain the amplitude gain and phase corresponding to each of the radio frequency coil transmission channels, and the amplitude gain and phase corresponding to each of the system radio frequency transmission channels; When a patient undergoes an MRI scan, After at least one radio frequency coil transmission channel in each radio frequency transmission coil of the nuclear magnetic resonance system is connected to the system radio frequency transmission channel, the radio frequency transmission signal emitted by the total radio frequency transmission channel composed of the mutually plugged system radio frequency transmission channel and the radio frequency coil transmission channel is calibrated according to the amplitude gain and phase respectively corresponding to the mutually plugged system radio frequency transmission channel and the radio frequency coil transmission channel.

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