Nuclear magnetic resonance system, method and device for radio frequency transmit signal correction and medical apparatus

Abstract

The application relates to a nuclear magnetic resonance system, a radio frequency transmission 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 transmission channels and at least one radio frequency transmission coil, wherein the radio frequency transmission coil comprises at least one radio frequency coil transmission channel; each system radio frequency transmission channel can be plugged with any radio frequency coil transmission channel and can be unplugged from the plugged radio frequency coil transmission channel; the processing assembly is used for correcting the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and the phase corresponding to the mutually plugged system radio frequency transmission channel and radio frequency coil transmission channel; and the total radio frequency transmission channel is composed of the mutually plugged system radio frequency transmission channel and radio frequency coil transmission channel. The nuclear magnetic resonance system can improve the scanning efficiency of the nuclear magnetic resonance system.

Description

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

[0002] This 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 Technology

[0003] With the rapid development of medical technology, magnetic resonance imaging (MRI) technology has become increasingly mature. MRI can not only display tangible solid lesions, but also accurately assess functional responses in organs such as the brain, heart, and liver. In high-field and ultra-high-field MRI systems, two radio frequency (RF) transmission channels are typically used to process the RF transmission signals, obtaining RF transmission signals with fixed amplitude and phase. These signals are then transmitted to the scanned area. Changes in electrons within the scanned area are acquired, and images are generated based on these changes. Each complete RF transmission channel consists of a system RF transmission channel and an RF coil transmission channel.

[0004] In traditional technologies, radio frequency transmission channels have low flexibility and inconvenience during use, which affects the efficiency of scanning using nuclear magnetic resonance systems. Summary of the Invention

[0005] Therefore, it is necessary to provide a magnetic resonance imaging (MRI) system, a radio frequency transmission signal correction method, a device, and a medical device to address the aforementioned technical problems, thereby improving the efficiency of MRI scanning.

[0006] In a first aspect, a nuclear magnetic resonance (NMR) system is provided, comprising a processing component, multiple system radio frequency (RF) transmission channels, and at least one RF transmission coil, wherein the RF transmission coil includes at least one RF coil transmission channel; each system RF transmission channel is capable of being plugged into any RF coil transmission channel; the processing component 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 plugged-in system RF transmission channels and RF coil transmission channels, respectively; the total RF transmission channel is composed of the plugged-in system RF transmission channels and RF coil transmission channels.

[0007] In one embodiment, the processing component is specifically configured to: calibrate the amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain corresponding to the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel respectively; and calibrate the phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the phase corresponding to the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel respectively.

[0008] In one embodiment, the total radio frequency transmission channel includes multiple processing components, specifically used for: acquiring the amplitude gain relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; and calibrating 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.

[0009] In one embodiment, the total radio frequency transmission channel includes multiple processing components, specifically used for: acquiring the phase relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; and calibrating the phase of the radio frequency transmission signals emitted by each total radio frequency transmission channel according to the phase relationship and the phase corresponding to each total radio frequency transmission channel.

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

[0011] In one embodiment, the processing component is specifically used to: when the phase relationship is such that the phases of the radio frequency transmission signals emitted by each total radio frequency transmission channel are consistent, subtract the corresponding phase calibration value from the phase of each radio frequency transmission signal.

[0012] In one embodiment, before the processing component calibrates the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase corresponding to the interlocked system RF transmission channels and RF coil transmission channels respectively, the processing component is further configured to: acquire each total RF transmission channel generated after each RF coil transmission channel is connected to each system RF transmission channel; 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; 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] Secondly, a radio frequency (RF) transmission signal correction method is provided, applied to the aforementioned nuclear magnetic resonance (NMR) system. The method includes: identifying interlocking RF transmission channels and RF coil transmission channels among the multiple system RF transmission channels and multiple RF coil transmission channels included in the NMR system; calibrating the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase corresponding to the interlocking RF transmission channels and RF coil transmission channels respectively, wherein the total RF transmission channel is composed of interlocking RF transmission channels and RF coil transmission channels.

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

[0015] The determination module is used to identify the interlocking system radio frequency transmission channels and radio frequency coil transmission channels among the multiple system radio frequency transmission channels and multiple radio frequency coil transmission channels included in the nuclear magnetic resonance system;

[0016] The calibration module is used to calibrate the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase of the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel, respectively; the total radio frequency transmission channel consists of the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel.

[0017] Fourthly, a medical device is provided, including a memory and a processor. The memory stores a computer program. The medical device includes a medical device body, an MRI system, and a scanning bed. When the processor executes the computer program, it implements the radio frequency transmission signal correction method as described in any of the second aspects above.

[0018] The aforementioned MRI system, radio frequency transmission signal correction method, apparatus, and medical device include an MRI system comprising a processing component, multiple system radio frequency transmission channels, and at least one radio frequency transmission coil. Each radio frequency transmission coil includes at least one radio frequency coil transmission channel. Each system radio frequency transmission channel can be plugged into and unplugged from any plugged radio frequency coil transmission channel. The processing component calibrates the radio frequency transmission signal emitted by the total radio frequency transmission channel based on the amplitude gain and phase corresponding to the plugged-in system radio frequency transmission channels and radio frequency coil transmission channels, respectively. The total radio frequency transmission channel is composed of plugged-in system radio frequency transmission channels and radio frequency coil transmission channels. In this MRI system, the radio frequency coil transmission channels in the radio frequency transmission coils are plugged into and unplugged from the system radio frequency transmission channels, allowing selection of at least one radio frequency transmission coil based on the patient's condition and actual needs, and connection of at least one radio frequency coil transmission channel to the system radio frequency transmission channel. This improves the flexibility of the MRI system, optimizes the MRI scanning workflow, and saves time. Furthermore, the processing components in the MRI system calibrate the RF transmission signal emitted by the overall RF transmission channel based on the amplitude gain and phase of the interconnected system RF transmission channel and RF coil transmission channel, respectively. Therefore, when the scanner connects the system RF transmission channel and RF coil transmission channel according to scanning requirements, it can directly scan and achieve circular polarization of the RF transmission, improving transmission efficiency and image quality. Attached Figure Description

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

[0020] Figure 2 This is a flowchart illustrating the process of determining the amplitude gain and phase corresponding to each radio frequency coil transmission channel in a nuclear magnetic resonance system, as well as the amplitude gain and phase corresponding to each system radio frequency transmission channel, in one embodiment.

[0021] Figure 3 This is a flowchart illustrating the radio frequency transmission signal correction steps in one embodiment;

[0022] Figure 4 This is a flowchart illustrating the radio frequency transmit signal correction method in another embodiment. Figure 1 ;

[0023] Figure 5 This is a flowchart illustrating the radio frequency transmit signal correction method in another embodiment. Figure 2 ;

[0024] Figure 6 This is a flowchart illustrating the radio frequency transmit signal correction method in another embodiment. Figure 3 ;

[0025] Figure 7 This is a flowchart illustrating the radio frequency transmit signal correction method in another embodiment. Figure 4 ;

[0026] Figure 8 A structural block diagram of a radio frequency transmission signal correction device in one embodiment. Figure 1 ;

[0027] Figure 9 A structural block diagram of a radio frequency transmission signal correction device in one embodiment. Figure 2 ;

[0028] Figure 10 A structural block diagram of a radio frequency transmission signal correction device in one embodiment. Figure 3 ;

[0029] Figure 11 This is an internal structure diagram of a computer device that is a server in one embodiment.

[0030] Figure 12 This is an internal structure diagram of a computer device that is a terminal in one embodiment. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] The technical solution of this application and how it solves the technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0033] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0034] This application provides a nuclear magnetic resonance system, such as Figure 1 As shown, 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.

[0035] In the embodiments of this application, the processing component included in the nuclear magnetic resonance system can be a computer device, which can be, but is not limited to, various personal computers, laptops, smartphones, tablets, and portable wearable devices.

[0036] To facilitate MRI scans of patients, the MRI system can provide multiple system radio frequency (RF) transmission channels and at least one RF transmission coil. The number of RF transmission coils is not specifically limited in this application. Furthermore, the RF transmission coils can be used to scan areas such as the patient's head, abdomen, and legs; the function of the RF transmission coils is not specifically limited in the embodiments of this application.

[0037] Each system's RF transmission channel can be plugged into any RF coil transmission channel and can be unplugged from the plugged-in RF coil transmission channel.

[0038] When performing MRI scans on patients, each radio frequency coil transmission channel can be plugged into any system radio frequency transmission channel, and the patient can be scanned using the interconnected system radio frequency transmission channels and radio frequency coil transmission channels.

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

[0040] After the MRI scan of the patient is completed, each radio frequency coil transmission channel can be detached from the system's radio frequency transmission channel for easy preservation of each radio frequency transmission 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 corresponding to the interlocked system radio frequency transmission channel and radio frequency coil transmission channel, respectively.

[0042] The main radio frequency transmission channel consists of interconnected system radio frequency transmission channels and radio frequency coil transmission channels.

[0043] Since each system's RF transmission channel and RF coil transmission channel have corresponding amplitude gain and phase, when different system RF transmission channels and different RF coil transmission channels are connected, the amplitude gain and phase of the total RF transmission channel composed of the interlocked 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 of the interlocked system RF transmission channels and RF coil transmission channels respectively.

[0044] Specifically, the nuclear magnetic resonance system may also include a storage component that stores the amplitude gain and phase corresponding to each system radio frequency (RF) transmission channel and each RF coil transmission channel. The processing component can obtain the amplitude gain and phase corresponding to the interlocked system RF transmission channels and RF coil transmission channels from the storage component, and then calibrate the RF transmission signal emitted by the total RF transmission channel based on the amplitude gain and phase corresponding to the interlocked system RF transmission channels and RF coil transmission channels.

[0045] The aforementioned MRI system includes a processing component, multiple system radio frequency (RF) transmission channels, and at least one RF transmission coil. Each RF transmission coil includes at least one RF coil transmission channel. Each system RF transmission channel can be plugged into and unplugged from any of the plugged-in RF coil transmission channels. The processing component calibrates the RF transmission signal emitted by the total RF transmission channel based on the amplitude gain and phase corresponding to the plugged-in system RF transmission channels and RF coil transmission channels, respectively. The total RF transmission channel consists of plugged-in system RF transmission channels and RF coil transmission channels. The RF coil transmission channels in the aforementioned MRI system are plugged into and unplugged from the system RF transmission channels, allowing selection of at least one RF transmission coil based on the patient's condition and actual needs, and connection of at least one RF coil transmission channel to the system RF transmission channel. This improves the flexibility of the MRI system, optimizes the MRI scanning workflow, and saves time. Furthermore, the processing component in the MRI system calibrates the RF transmission signal emitted by the total RF transmission channel based on the amplitude gain and phase corresponding to the plugged-in system RF transmission channels and RF coil transmission channels, respectively. Therefore, when the scanner connects the system's RF transmission channel and RF coil transmission channel according to the scanning requirements, it can directly scan and achieve circular polarization of RF transmission, thereby improving transmission efficiency and image quality.

[0046] In one optional embodiment of this application, the processing component is specifically used to: calibrate the amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain corresponding to the interlocked system radio frequency transmission channel and radio frequency coil transmission channel respectively.

[0047] Specifically, the nuclear magnetic resonance system may also include a storage component that stores the amplitude gain and phase corresponding to each system radio frequency (RF) transmission channel and each RF coil transmission channel. The processing component can obtain the amplitude gain corresponding to the interlocked system RF transmission channels and RF coil transmission channels from the storage component.

[0048] The processing component can calculate the amplitude of the radio frequency (RF) transmitted signal based on a first preset algorithm, according to the user's amplitude requirements for the target RF transmitted signal and the amplitude gains corresponding to the interlocked system RF transmitted channels and RF coil transmitted channels, to obtain the target RF transmitted signal. The first preset algorithm may include at least one of the following operations: addition, subtraction, multiplication, division, squaring, square root, and reciprocal.

[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 based on the phases corresponding to the interlocked system radio frequency transmission channels and radio frequency coil transmission channels.

[0050] Specifically, the nuclear magnetic resonance system may also include a storage component that stores the amplitude gain and phase corresponding to each system radio frequency (RF) transmission channel and each RF coil transmission channel. The processing component can obtain the phases corresponding to the interlocked system RF transmission channels and RF coil transmission channels from the storage component.

[0051] The processing component can calculate the phase of the radio frequency transmission signal based on a second preset algorithm, according to the user's phase requirements for the target radio frequency transmission signal and the corresponding phases of the interconnected system radio frequency transmission channels and radio frequency coil transmission channels, to obtain the target radio frequency transmission signal. The second preset algorithm can include at least one of the following operations: addition, subtraction, multiplication, division, squaring, square root, and reciprocal.

[0052] It should be noted that, in the embodiments of this application, the processing component may first correct the amplitude of the radio frequency (RF) transmitted signal and then correct the phase of the RF transmitted signal; the processing component may also first correct the phase of the RF transmitted signal and then correct the amplitude of the RF transmitted signal; or the processing component may simultaneously correct both the amplitude and phase of the RF transmitted signal. This application does not specifically limit the order in which the processing component corrects the amplitude and phase of the RF transmitted signal.

[0053] In this embodiment, the processing component is specifically used to: calibrate the amplitude of the radio frequency (RF) transmission signal emitted by the total RF transmission channel according to the amplitude gains corresponding to the interlocked system RF transmission channels and RF coil transmission channels; and calibrate the phase of the RF transmission signal emitted by the total RF transmission channel according to the phases corresponding to the interlocked system RF transmission channels and RF coil transmission channels. This enables the RF transmission signal after amplitude and phase calibration to achieve circular polarization, thereby improving transmission efficiency and image quality.

[0054] In an optional embodiment of this application, the total radio frequency transmission channel includes multiple processing components, specifically used for: acquiring the amplitude gain relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; and calibrating 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.

[0055] Specifically, when multiple RF coil transmitting channels are connected to multiple system RF transmitting channels to form multiple total RF transmitting channels, in order to ensure that the image generated by the RF transmitting signals emitted by each total RF transmitting channel is of high quality, the user usually inputs the amplitude gain relationship between the RF transmitting signals emitted by the multiple total RF transmitting channels to the processing component according to the actual situation.

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

[0057] Specifically, after receiving the amplitude gain relationship between the radio frequency transmission signals emitted by multiple total radio frequency transmission channels input by the user, the processing component can correct the radio frequency transmission signals emitted by each total radio frequency transmission channel using a third preset algorithm based on the amplitude gain relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels and the amplitude gain corresponding to each total radio frequency transmission channel, thereby obtaining multiple target radio frequency transmission signals. Then, the target image is generated using the multiple target radio frequency transmission signals. The third preset algorithm can include at least one of the following operations: addition, subtraction, multiplication, division, squaring, square root, and reciprocal.

[0058] For example, the total number of RF transmission channels is 2. Total RF transmission channel 1 consists of system RF transmission channel 1 and RF coil transmission channel 1 in RF transmission coil A; total RF transmission channel 2 consists 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, so 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, so the amplitude gain corresponding to total RF transmission channel 2 is E1*E2.

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

[0060] The amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel 1, multiplied by the reciprocal of C1*C2, is... The amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel 2 is twice the reciprocal of E1*E2, i.e. This results in an amplitude gain ratio of 1:2 between the radio frequency transmission signals emitted by the total radio frequency transmission channels 1 and 2.

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

[0062] Specifically, when multiple RF coil transmitting channels are connected to the system RF transmitting channel to form multiple total RF transmitting channels, in order to ensure that the image generated by the RF transmitting signals emitted by each total RF transmitting channel is of high quality, the user usually inputs the phase relationship between the RF transmitting signals emitted by the multiple total RF transmitting channels to the processing component according to the actual situation.

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

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

[0065] In this embodiment, the total radio frequency (RF) transmission channel includes multiple channels. A processing component is specifically used for: acquiring the amplitude-gain relationship between the RF transmission signals emitted by the multiple total RF transmission channels; calibrating the amplitude of the RF transmission signal emitted by each total RF transmission channel based on the amplitude-gain relationship and the amplitude gain corresponding to each total RF transmission channel; acquiring 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 based on the phase relationship and the phase corresponding to each total RF transmission channel. The processing component acquires the amplitude-gain relationship and 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 based on the amplitude gain and phase corresponding to each total RF transmission channel. This ensures that the calibrated RF transmission signals emitted by each total RF transmission channel meet user requirements and achieve circular polarization of the RF transmission, thereby improving transmission efficiency and image quality.

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

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

[0068] Specifically, when the amplitude gain relationship is such that the amplitude gain of the RF transmission signal emitted by each total RF transmission channel is consistent, the processing component obtains the amplitude gain corresponding to each total RF transmission channel respectively. The amplitude gain corresponding to each total RF transmission channel is the product of the amplitude gains corresponding to the system RF transmission channel and the RF coil transmission channel that are interlocked with each total RF transmission channel.

[0069] To ensure that the amplitude of the radio frequency transmission signals emitted by multiple main radio frequency transmission channels is consistent, the processing component can multiply the amplitude of the radio frequency transmission signal emitted by each main radio frequency transmission channel by the corresponding amplitude calibration value.

[0070] For example, the total number of RF transmission channels is 2. Total RF transmission channel 1 consists of system RF transmission channel 1 and RF coil transmission channel 1 in RF transmission coil A; total RF transmission channel 2 consists 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, so 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, so the amplitude gain corresponding to total RF transmission channel 2 is E1*E2.

[0071] Assume that the amplitude gain relationship between the RF transmission signals emitted by multiple total RF transmission channels can be: the amplitudes of total RF transmission channel 1 and total RF transmission channel 2 are consistent.

[0072] The amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel 1, multiplied by the reciprocal of C1*C2, is... The amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel 2 is multiplied by the reciprocal of E1*E2, that is... This ensures that the amplitudes of the radio frequency transmission signals emitted by the main radio frequency transmission channel 1 and the main radio frequency transmission channel 2 are consistent.

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

[0074] Specifically, when the phase relationship is such that the phases of the radio frequency transmission signals emitted by each total radio frequency transmission channel are consistent, the processing component obtains the phase corresponding to each total radio frequency transmission channel respectively. The phase corresponding to each total radio frequency transmission channel is the sum of the phases corresponding to the system radio frequency transmission channels and radio frequency coil transmission channels that are interlocked with each total radio frequency transmission channel.

[0075] To ensure phase consistency among the RF transmission signals emitted by multiple main RF transmission channels, the processing component can subtract the corresponding phase calibration value from the phase of the RF transmission signal emitted by each main RF transmission channel.

[0076] For example, the total number of RF transmission channels is 2. Total RF transmission channel 1 consists of system RF transmission channel 1 and RF coil transmission channel 1 in RF transmission coil A; total RF transmission channel 2 consists 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 multiple main radio frequency transmission channels can be: the phase between main radio frequency transmission channel 1 and main radio frequency transmission channel 2 is consistent.

[0078] The phase of the RF transmission signal emitted by the main RF transmission channel 1 is reduced by the sum of D1 and D2; the phase of the RF transmission signal emitted by the main RF transmission channel 2 is reduced by the sum of F1 and F2, thus making the phase of the RF transmission signals emitted by the main RF transmission channel 1 and the main RF transmission channel 2 consistent.

[0079] In this embodiment, when the amplitude gain and phase of the RF transmission signals 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 signals emitted by each total RF transmission channel are consistent, achieving RF correction during scanning. This satisfies user needs and achieves circular polarization of RF transmission, thereby improving transmission efficiency and image quality.

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

[0081] After obtaining the connection between each RF coil transmission channel and each system RF transmission channel, the total RF transmission channels are generated.

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

[0083] 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.

[0084] Specifically, the processing component can generate FID signals and / or images using the radio frequency transmission signals emitted from each of the main radio frequency transmission channels. 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 of each FID signal and / or image are input into a preset algorithm model to obtain the amplitude gain and phase of each RF coil transmission channel, as well as the amplitude gain and phase of each system RF transmission channel.

[0086] Specifically, the processing component inputs the amplitude and phase of each FID signal and / or image into a preset algorithm model. The preset algorithm model can be a machine learning-based model, an algorithm model generated by various mathematical operations, or a deep learning-based model, 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, let's illustrate with a feasible algorithm model. Assume an NMR system includes two system RF transmission channels, system RF transmission channel 1 and system RF transmission channel 2, and an RF transmission coil. The RF transmission coil includes two RF coil transmission channels, RF coil transmission channel 1 and RF coil transmission channel 2. For example... Figure 2 As shown.

[0089] First, connect system RF transmission channel 1 and RF coil transmission channel 1, and connect system RF transmission channel 2 and RF coil transmission channel 2. Use only system RF transmission channel 1 and RF coil transmission channel 1 for RF transmission to perform magnetic resonance scanning and obtain FID signals and / or images. Denote the amplitude of the FID signal and / or image as A1 and the phase as P1. Then, use only system RF transmission channel 2 and RF coil transmission channel 2 for RF transmission to perform magnetic resonance scanning and obtain FID signals and / or images. Denote the amplitude of the FID signal and / or image as A2 and the phase as P2.

[0090] The second step involves connecting system RF transmission channel 1 and RF coil transmission channel 2, and connecting system RF transmission channel 2 to RF coil transmission channel 1. RF transmission is performed using only system RF transmission channel 1 and RF coil transmission channel 2 to conduct magnetic resonance scanning, obtaining an FID signal and / or image. The amplitude of the FID signal and / or image is denoted as A3, and the phase as P3. Magnetic resonance scanning is then performed using only system RF transmission channel 2 and RF coil transmission channel 1 to obtain an FID signal and / or image. The amplitude of the FID signal or image is denoted as A4, and the phase as P4.

[0091] Specifically, as shown in Table 1:

[0092]

[0093] Let the amplitude gain of the system's RF transmission channel 1 be C1 and the phase be D1; the amplitude gain of the system's RF transmission channel 2 be C2 and the phase be D2; the amplitude gain of the coil RF transmission channel 1 be E1 and the phase be F1; and the amplitude gain of the coil RF transmission channel 2 be E2 and the phase be 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, then the amplitude of the image and / or FID signal is affected by the amplitude gain of the system's RF transmission channel and the coil's RF transmission channel, which yields:

[0097] (1)

[0098] (2)

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

[0100] Similarly, by using (1) / (2), we can obtain

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

[0102]

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

[0104] Using (3)-(4), similarly, we can obtain, .

[0105] Using any one of the system's RF transmission channels and any one of the RF transmission coil channels as a reference, in this embodiment, system RF transmission channel 1 and RF coil transmission channel 1 are used as references. The amplitude correction value of system RF transmission channel 1 is 1, and the phase correction value is 0. The amplitude correction value of RF coil transmission channel 1 is 1, and the phase correction value is 0. The amplitude correction value of system RF transmission channel 2 is... The phase correction value for system RF transmission channel 2 is (P1-P2+P3-P4) / 2. The amplitude correction value for RF coil transmission channel 2 is... The phase correction value of RF coil transmitting channel 2 is (P1-P2-P3+P4) / 2.

[0106] In this embodiment, the processing component is further configured to: acquire each total RF transmission channel generated after each RF coil transmission channel is connected to each system RF transmission channel; 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; 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. This allows for the calculation of the amplitude and phase correction values ​​for each system RF transmission channel and RF coil transmission channel by changing the connection method of the system RF transmission channel and the RF coil transmission channel, and obtaining the MRI signals under different connection methods through MRI scanning. This helps reduce the hardware cost of system calibration and maintenance and improves operational convenience.

[0107] Please see Figure 3 An optional embodiment of this 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: Among the multiple system radio frequency transmission channels and multiple radio frequency coil transmission channels included in the nuclear magnetic resonance system, the interlocking system radio frequency transmission channels and radio frequency coil transmission channels are determined.

[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 interlocked system radio frequency transmission channel and radio frequency coil transmission channel, respectively.

[0110] The main radio frequency transmission channel consists of interconnected system radio frequency transmission channels and radio frequency coil transmission channels.

[0111] In an optional embodiment of this application, such as Figure 4 As shown, step 302 above, "calibrating the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase corresponding to the interlocked system RF transmission channel and RF coil transmission channel respectively," 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 gain corresponding to the interlocked system radio frequency transmission channel and radio frequency coil transmission channel.

[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 interlocked system radio frequency transmission channels and radio frequency coil transmission channels.

[0114] In one optional embodiment of this application, the total radio frequency transmission channels include multiple channels, such as... Figure 5 As shown, step 401 above, "calibrating the amplitude of the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain corresponding to the interlocked system RF transmission channel and RF coil transmission channel respectively," may include the following steps:

[0115] Step 501: The nuclear magnetic resonance system acquires the amplitude-gain relationship between the radio frequency transmission signals emitted by multiple 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 one optional embodiment of this application, the total radio frequency transmission channels include multiple channels, such as... Figure 6 As shown, step 402 above, "calibrating the phase of the RF transmission signal emitted by the total RF transmission channel according to the phases corresponding to the interlocked system RF transmission channels and RF coil transmission channels respectively," may include the following steps:

[0118] Step 601: The nuclear magnetic resonance system acquires the phase relationship between the radio frequency transmission signals emitted by multiple 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 this application, step 502 above, "calibrating 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," may include the following:

[0121] When the amplitude gain relationship is such 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. The amplitude calibration value is the reciprocal of the product of the amplitude gains of the interlocked system RF transmission channels and RF coil transmission channels corresponding to each total RF transmission channel.

[0122] In an optional embodiment of this application, step 602 above, "calibrating 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," may include the following:

[0123] When the phase relationship is such 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. The phase calibration value is the sum of the phases of the system RF transmission channels and RF coil transmission channels that are interlocked with each total RF transmission channel.

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

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

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

[0127] 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 radio frequency coil transmission channel, as well as the amplitude gain and phase corresponding to each system radio frequency transmission channel.

[0128] Specific limitations regarding the radio frequency (RF) transmission signal correction method can be found in the limitations of the nuclear magnetic resonance (NMR) system described above, and will not be repeated here. Since the RF transmission signal correction method uses the NMR system provided in the above embodiments, it possesses all the beneficial effects of the NMR system, and will not be elaborated further here.

[0129] It should be understood that, although Figures 3-7 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figures 3-7 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0130] In one embodiment of this application, such as 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 interlocking system radio frequency transmission channels and radio frequency coil transmission channels among the multiple system radio frequency transmission channels and multiple radio frequency coil transmission channels included in the nuclear magnetic resonance system;

[0132] The calibration module 8020 is used to calibrate the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase of the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel, respectively; the total radio frequency transmission channel consists of the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel.

[0133] In one embodiment of this application, such as Figure 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 radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain corresponding to the interlocked system radio frequency transmission channel and radio frequency coil transmission channel.

[0135] The phase calibration unit 8022 is used to calibrate the phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the phases corresponding to the interlocked system radio frequency transmission channels and radio frequency coil transmission channels.

[0136] In one embodiment of this application, the total radio frequency transmission channels include multiple channels. The amplitude calibration unit 8021 is specifically used to obtain the amplitude gain relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; and to calibrate 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.

[0137] In one embodiment of this application, the total radio frequency transmission channels include multiple channels. The phase calibration unit 8022 is specifically used to obtain the phase relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; and to 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.

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

[0139] In one embodiment of this application, the phase calibration unit 8022, when the phase relationship is that the phases of the radio frequency transmission signals emitted by each total radio frequency transmission channel are consistent, subtracts the corresponding phase calibration value from the phase of each radio frequency transmission signal. The phase calibration value is the sum of the phases corresponding to the interlocked system radio frequency transmission channels and radio frequency coil transmission channels corresponding to each total radio frequency transmission channel.

[0140] In one embodiment of this application, such as Figure 10 As shown, the above-mentioned radio frequency transmission signal correction device 8000 further includes:

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

[0144] Specific limitations regarding the RF transmission signal correction device can be found in the limitations of the RF transmission signal correction method described above, and will not be repeated here. Each module in the aforementioned RF transmission signal correction device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independently of the processor in a computer device, or stored in software in the memory of a computer device, so that the processor can call and execute the corresponding operations of each module.

[0145] In one embodiment, a medical device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 11 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computational and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores radio frequency (RF) transmission signal correction data. The network interface communicates with external terminals via a network connection. When executed by the processor, the computer program implements an RF transmission signal correction method.

[0146] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 12 As shown, the computer device includes a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a radio frequency transmission signal correction method. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the computer device casing, or an external keyboard, touchpad, or mouse.

[0147] Those skilled in the art will understand that Figure 11 and Figure 12The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0148] In one embodiment, a medical device is provided, including a memory and a processor. The memory stores a computer program. The medical device includes a medical device body, an MRI system, and a scanning bed. When the processor executes the computer program, it performs the following steps: calibrating the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase corresponding to the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel, respectively. The total radio frequency transmission channel is composed of the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel.

[0149] In one embodiment, when the processor executes the computer program, it further performs the following steps: calibrating the amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain corresponding to the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel respectively; and calibrating the phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the phase corresponding to the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel respectively.

[0150] In one embodiment, the total radio frequency transmission channels include multiple channels, and when the processor executes the computer program, it further implements the following steps: obtaining the amplitude gain relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; calibrating 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.

[0151] In one embodiment, the total radio frequency transmission channels include multiple channels, and when the processor executes the computer program, it further performs the following steps: obtaining the phase relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; and calibrating the phase of the radio frequency transmission signals emitted by each total radio frequency transmission channel according to the phase relationship and the phase corresponding to each total radio frequency transmission channel.

[0152] In one embodiment, when the processor executes the computer program, it further implements the following steps: when the amplitude gain relationship is such that the amplitude gain of the radio frequency transmission signals emitted by each total radio frequency transmission channel is consistent, the amplitude of each radio frequency transmission signal is multiplied by the corresponding amplitude calibration value, wherein the amplitude calibration value is the reciprocal of the product of the amplitude gains of the interlocked system radio frequency transmission channels and the radio frequency coil transmission channels corresponding to each total radio frequency transmission channel.

[0153] In one embodiment, when the processor executes the computer program, it further implements the following steps: a processing component, specifically configured to: when the phase relationship is such that the phases of the radio frequency transmission signals emitted by each total radio frequency transmission channel are consistent, subtract the corresponding phase calibration value from the phase of each radio frequency transmission signal, wherein the phase calibration value is the sum of the phases corresponding to the interlocked system radio frequency transmission channels and radio frequency coil transmission channels corresponding to each total radio frequency transmission channel.

[0154] In one embodiment, when the processor executes the computer program, it further implements the following steps: acquiring each total radio frequency transmission channel generated after each radio frequency coil transmission channel is connected to each system radio frequency transmission channel; acquiring the FID signal and / or image corresponding to each total radio frequency transmission channel, and determining the amplitude and phase corresponding to each FID signal and / or image; inputting 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 radio frequency coil transmission channel, and the amplitude gain and phase corresponding to each system radio frequency transmission channel.

[0155] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, performs the following steps: calibrating the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain and phase corresponding to the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel, respectively; the total radio frequency transmission channel is composed of the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel.

[0156] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: calibrating the amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the amplitude gain corresponding to the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel respectively; and calibrating the phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel according to the phase corresponding to the interlocked system radio frequency transmission channel and the radio frequency coil transmission channel respectively.

[0157] In one embodiment, the total radio frequency transmission channels include multiple channels, and when the computer program is executed by the processor, it further performs the following steps: obtaining the amplitude gain relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; calibrating the amplitude of the radio frequency transmission signals 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.

[0158] In one embodiment, the total radio frequency transmission channels include multiple channels, and when the computer program is executed by the processor, it further performs the following steps: obtaining the phase relationship between the radio frequency transmission signals emitted by the multiple total radio frequency transmission channels; and calibrating the phase of the radio frequency transmission signals emitted by each total radio frequency transmission channel according to the phase relationship and the phase corresponding to each total radio frequency transmission channel.

[0159] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: when the amplitude gain of the radio frequency transmission signals emitted by each total radio frequency transmission channel is consistent, the amplitude of each radio frequency transmission signal is multiplied by the corresponding amplitude calibration value, wherein the amplitude calibration value is the reciprocal of the product of the amplitude gains of the interlocked system radio frequency transmission channels and the radio frequency coil transmission channels corresponding to each total radio frequency transmission channel.

[0160] In one embodiment, when the computer program is executed by the processor, it further implements the following steps: a processing component, specifically configured to: when the phase relationship is such that the phases of the radio frequency transmission signals emitted by each total radio frequency transmission channel are consistent, subtract the corresponding phase calibration value from the phase of each radio frequency transmission signal, wherein the phase calibration value is the sum of the phases corresponding to the interlocked system radio frequency transmission channels and radio frequency coil transmission channels corresponding to each total radio frequency transmission channel.

[0161] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: acquiring each total radio frequency transmission channel generated after each radio frequency coil transmission channel is connected to each system radio frequency transmission channel; acquiring the FID signal and / or image corresponding to each total radio frequency transmission channel, and determining the amplitude and phase corresponding to each FID signal and / or image; inputting 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 radio frequency coil transmission channel, and the amplitude gain and phase corresponding to each system radio frequency transmission channel.

[0162] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, 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), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0163] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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 embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

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

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

3. The nuclear magnetic resonance system according to claim 2, characterized in that, The phase difference between the main radio frequency transmission channel 1 and the main radio frequency 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: The amplitude of the RF transmission signal emitted by the total RF transmission channel is calibrated based on the amplitude gain corresponding to the interlocked system RF transmission channel and RF coil transmission channel. The phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel is calibrated based on the phases corresponding to the interlocked system radio frequency transmission channels and radio frequency coil transmission channels.

5. The nuclear magnetic resonance system according to claim 4, characterized in that, The processing component is specifically used for: During the calibration of the amplitude of the radio frequency transmission signal emitted by the total radio frequency transmission channel, or the calibration of the phase of the radio frequency transmission signal emitted by the total radio frequency transmission channel, the system radio frequency transmission channel 1 and the radio frequency 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 such that the amplitude gain of the RF transmission signals emitted by each of the total RF transmission channels is consistent, the amplitude of each RF 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 such that the phases of the radio frequency transmission signals emitted by each of the total radio frequency transmission channels are consistent, the phase of each radio frequency transmission signal is subtracted from the corresponding phase calibration value.

8. The nuclear magnetic resonance system according to claim 5, characterized in that, Before the processing component calibrates the RF transmission signal emitted by the total RF transmission channel according to the amplitude gain and phase corresponding to the interlocked system RF transmission channel and RF coil transmission channel, the processing component is further configured to: After obtaining the connection between each of the radio frequency coil transmitting channels and each of the system radio frequency transmitting channels, the total radio frequency transmitting channels are generated. Acquire the FID signal and / or image corresponding to each of the total radio frequency transmission channels, and determine the amplitude and phase corresponding to each of the FID signals and / or images; 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, as well as the amplitude gain and phase corresponding to each system RF transmission channel.

9. A method for correcting radio frequency transmitted signals, characterized in that, Applied to a nuclear magnetic resonance (NMR) system, the NMR system including multiple radio frequency coil transmission channels and multiple system radio frequency transmission channels, the method includes: Among the plurality of system radio frequency transmission channels and the plurality of radio frequency coil transmission channels, interlocking system radio frequency transmission channels and radio frequency coil transmission channels are identified; The RF transmission signal emitted by the total RF transmission channel is calibrated based on the amplitude gain and phase corresponding to the interlocked system RF transmission channels and RF coil transmission channels, respectively. The total RF transmission channel is composed of the interlocked system RF transmission channels and RF coil transmission channels. The calibration of the RF transmission signal emitted by the total RF transmission channel ensures that the phase between the RF transmission signals emitted by the multiple total RF transmission channels meets a preset requirement, or that the amplitude between the RF transmission signals emitted by the multiple total RF transmission channels meets a preset requirement.

10. A medical device comprising a memory and a processor, the memory storing a computer program, characterized in that, The medical device includes an MRI system, which comprises multiple radio frequency coil transmission channels and multiple system radio frequency transmission channels. When the processor executes the computer program, it performs the following steps: Before performing an MRI scan on the patient, Determine the total radio frequency transmission channels formed after connecting each of the radio frequency coil transmission channels and each of the system radio frequency transmission channels; Acquire the FID signal and / or image corresponding to each total radio frequency transmission channel, and determine the amplitude and phase corresponding to each FID signal and / or image; 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. When performing an MRI scan on a patient 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 interlocked system radio frequency transmission channels and radio frequency coil transmission channels is calibrated according to the amplitude gain and phase corresponding to the interlocked system radio frequency transmission channels and radio frequency coil transmission channels respectively.

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