Radio frequency coil scanning control system, method, apparatus and radio frequency coil for magnetic resonance imaging

Abstract

The application provides a radio frequency coil scanning control system, method and device for magnetic resonance imaging and a radio frequency coil. The system control device controls the first radio frequency coil and the second radio frequency coil based on the target scanning site and depth information to obtain scanning image signals scanned by the first radio frequency coil and / or the second radio frequency coil and to perform image reconstruction. The application does not need to frequently replace the coil when performing single-nucleus magnetic resonance scanning, improves clinical efficiency, and also reduces mechanical cost.

Description

Technical Field

[0001] This application relates to the field of magnetic resonance imaging, and in particular to a radio frequency coil scanning control system, method, apparatus and radio frequency coil for magnetic resonance imaging. Background Technology

[0002] With the widespread application of magnetic resonance imaging (MRI) technology, radio frequency (RF) coil technology, an essential component of MRI, has also made significant progress and is widely used in imaging various parts of the human body. In current technology, MRI typically uses volumetric coils to generate and emit a B1 field, while corresponding surface receiving coils in different parts of the body receive the MRI signals. MRI requires high uniformity and a high signal-to-noise ratio in the scanned images of different parts of the body. In current technology, the imaging depth of surface coils is limited by the size of their elemental units; the maximum imaging depth of a typical RF coil is approximately 0.7 times its diameter or side length.

[0003] Currently, in practical applications, different coils need to be selected depending on the imaging site or tissue depth. For example, in patent CN112763953A, an array coil for knee imaging and an array coil for head imaging are combined using a mechanical slide rail device and a control system; in patent CN114137458B, two sets of coils, a surface coil and a birdcage coil, are fabricated within the same field of view (FOV) to achieve scanning imaging of different nuclides; in patent CN113608155A, two coaxially nested birdcage coils are fabricated within the same FOV to achieve scanning imaging of four different nuclides. However, these methods all have some drawbacks. For instance, while patent CN112763953A avoids frequent coil replacements during scanning, improving clinical efficiency, it also increases mechanical components beyond the coil body, leading to increased manufacturing costs. Patents CN114137458B and CN113608155A are multi-nucleus scanning imaging methods, offering no significant advantage when imaging the same nuclide. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a radio frequency coil scanning control system, method, coil, and system control device for magnetic resonance imaging, in order to solve the problems of high mechanical cost of single-nucleoside magnetic resonance systems and reduced clinical work efficiency caused by the need to replace coils in the prior art.

[0005] To achieve the above and other related objectives, this application provides a radio frequency coil scanning control system for magnetic resonance imaging, comprising: a first radio frequency coil, a second radio frequency coil, and a system control device; wherein, the system control device is connected to the first radio frequency coil and the second radio frequency coil, and is used to perform scanning control or detuning control on the first radio frequency coil and the second radio frequency coil respectively based on the target scanning location and depth information, so as to obtain the scanning image signal scanned by the first radio frequency coil and / or the second radio frequency coil, and perform image reconstruction.

[0006] In some embodiments of this application, the system control device includes: an information input module for acquiring input target scanning area and depth information; a coil control module connected to the information input module for controlling the first radio frequency coil to scan and controlling the second radio frequency coil to detune based on the target scanning area and depth information, or controlling the second radio frequency coil to scan and controlling the first radio frequency coil to detune based on the second radio frequency coil; and a data processing module connected to the coil control module for acquiring scan image signals from the first radio frequency coil and / or the second radio frequency coil, and performing image reconstruction based on the acquired scan image signals.

[0007] In some embodiments of this application, the first radio frequency coil and the second radio frequency coil each include: a plurality of radio frequency coil units and a radio frequency coil control circuit that is connected to each radio frequency coil unit.

[0008] In some embodiments of this application, the radio frequency coil control circuit includes: a detuned circuit, a coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor; wherein, one end of the first inductor is connected to the detuned circuit, and the other end is connected to one end of the first capacitor and the detuned current input terminal of the system control device; the other end of the first capacitor is grounded; the other end of the detuned circuit is connected in series with the input terminal of the coil unit preamplifier via the radio frequency coil unit; the output terminal of the coil unit preamplifier is connected to one end of the second inductor and one end of the second capacitor, and the second inductor and the second capacitor are connected in parallel; the other ends of the second inductor and the second capacitor are connected to the power supply and signal receiving terminal of the system control device.

[0009] In some embodiments of this application, the method of scanning control of the first radio frequency coil and detuning control of the second radio frequency coil includes: sending a scanning control signal to one or more radio frequency coil control circuits of the first radio frequency coil to cause the corresponding radio frequency coil unit to scan, and sending a detuning control signal to the remaining radio frequency coil control circuits; sending a detuning control signal to each radio frequency coil control circuit of the second radio frequency coil to detune the second radio frequency coil.

[0010] In some embodiments of this application, the methods for scanning control of the second RF coil and detuning control of the first RF coil include: sending a scanning control signal to one or more RF coil control circuits of the second RF coil to cause the corresponding RF coil unit to scan, and sending a detuning control signal to the remaining RF coil control circuits; sending a detuning control signal to each RF coil control circuit of the first RF coil to detune the first RF coil.

[0011] In some embodiments of this application, the data processing module is configured to perform any of the following processing methods: a first processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the first radio frequency coil, and performing image reconstruction based on the acquired scan image signal; a second processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the second radio frequency coil, and performing image reconstruction based on the acquired scan image signal; a third processing method includes: acquiring the signals scanned by the radio frequency coil unit scanning in the first radio frequency coil and the second radio frequency coil, and performing image reconstruction based on the acquired scan image signal.

[0012] To achieve the above and other related objectives, this application provides a radio frequency coil scanning control method for magnetic resonance imaging, applied to a radio frequency coil, comprising: a first radio frequency coil and a second radio frequency coil, comprising: acquiring target scanning area and depth information; performing scanning control or detuning control on the first radio frequency coil and the second radio frequency coil respectively based on the target scanning area and depth information to acquire scanning image signals scanned by the first radio frequency coil and / or the second radio frequency coil; and performing image reconstruction based on the acquired scanning image signals.

[0013] To achieve the above and other related objectives, this application provides a system control device, characterized in that it includes: a processor and a memory; the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the terminal executes the radio frequency coil scanning control method for magnetic resonance imaging.

[0014] To achieve the above and other related objectives, this application provides a radio frequency (RF) coil for magnetic resonance imaging, characterized in that it includes: a first RF coil and a second RF coil disposed on a substrate; wherein the first RF coil and the second RF coil each include: a plurality of RF coil units and an RF coil control circuit connected to each RF coil unit; the RF coil control circuit includes: a detuning circuit, a coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor; one end of the first inductor is connected to the detuning circuit, and the other end is connected to one end of the first capacitor and the detuning current input terminal of the system control device; the other end of the first capacitor is grounded; the other end of the detuning circuit is connected in series with the input terminal of the coil unit preamplifier via the connection of the RF coil unit; the output terminal of the coil unit preamplifier is connected to one end of the second inductor and one end of the second capacitor, and the second inductor and the second capacitor are connected in parallel; the other end of the second inductor and the second capacitor is connected to the power supply and signal receiving terminal of the system control device.

[0015] As described above, this application has the following beneficial effects: By using a system control device to perform scanning control or detuning control on the first and second radio frequency coils based on the target scanning location and depth information, scan image signals scanned by the first and / or second radio frequency coils are obtained, and image reconstruction is performed. This invention eliminates the need for frequent coil replacements during single-nucleoside magnetic resonance scanning, improving clinical efficiency and reducing mechanical costs. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of a radio frequency coil scanning control system for magnetic resonance imaging according to an embodiment of this application.

[0017] Figure 2 The diagram shown is a schematic flowchart of a coil control method for magnetic resonance imaging in one embodiment of this application.

[0018] Figure 3 The diagram shown is a schematic of a radio frequency coil control circuit in one embodiment of this application.

[0019] Figure 4 The diagram shown is a schematic diagram of a magnetic resonance imaging process in one embodiment of this application.

[0020] Figure 5 The diagram shown is a schematic representation of the scanning process of a radio frequency coil scanning control system for magnetic resonance imaging according to an embodiment of this application.

[0021] Figure 6 The diagram shown is a structural schematic of a system control device in one embodiment of this application.

[0022] Figure 7 The diagram shown is a schematic representation of the structure of a coil used for magnetic resonance imaging in one embodiment of this application. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0024] It should be noted that in the following description, reference is made to the accompanying drawings, which illustrate several embodiments of this application. It should be understood that other embodiments may also be used, and changes in mechanical composition, structure, electrical system, and operation may be made without departing from the spirit and scope of this application. The following detailed description should not be considered limiting, and the scope of the embodiments of this application is defined only by the claims of the published patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. Spatially related terms, such as “upper,” “lower,” “left,” “right,” “below,” “below,” “lower part,” “above,” “upper part,” etc., may be used herein to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data used can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising,” “including,” indicate the presence of the stated features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. It should be further understood that the terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” An exception to this definition will only occur if the combination of elements, functions, or operations is inherently mutually exclusive in some way.

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the invention.

[0028] like Figure 1 The diagram shown is a schematic representation of the radio frequency coil scanning control system for magnetic resonance imaging in an embodiment of the present invention.

[0029] The system includes: a first radio frequency coil 1, a second radio frequency coil 2, and a system control device 3;

[0030] The system control device 3 is connected to the first radio frequency coil 1 and the second radio frequency coil 2, and is used to perform scanning control or detuning control on the first radio frequency coil 1 and the second radio frequency coil 2 respectively based on the target scanning part and depth information, so as to obtain the scanning image signal scanned by the first radio frequency coil 1 and / or the second radio frequency coil 2, and perform image reconstruction.

[0031] The first radio frequency coil 1 and the second radio frequency coil 2 correspond to one or more scanning sites and the depth of the scannable tissue, respectively. The target scanning site and depth information include target scanning site information and / or target scanning depth information. The target scanning site includes: head, hand, knee joint, and tissue, etc. The target scanning depth information includes: the depth required for the target. The system control device 3 can select the first radio frequency coil 1 and / or the second radio frequency coil 2 to scan the target site and use the target depth based on the target scanning site and depth information.

[0032] For example, each coil has its corresponding ID. Once the coil ID is identified, the scanning area or tissue range is selected according to the preset scanning area or tissue range of the coil. Then, based on the selected scanning area or tissue range and the scanning depth corresponding to the first RF coil 1 and / or the scanning depth corresponding to the second RF coil 2, the first RF coil 1 and / or the second RF coil 2 are selected for scanning.

[0033] It should be noted that the first RF coil 1 and the second RF coil 2 are integrated into the same device, and the surface coverage of the first RF coil 1 and the second RF coil 2 may be the same or different.

[0034] Furthermore, the imaging range and imaging depth of the first radio frequency coil 1 and the second radio frequency coil 2 can be different. It should be noted that the type and model of the first radio frequency coil 1 and the second radio frequency coil 2 can be selected according to the imaging depth requirements of the magnetic resonance imaging site or tissue, and this invention does not limit this.

[0035] In some embodiments of the present invention, the system control device includes: an information input module for acquiring target scanning area and depth information; a coil control module connected to the information input module for performing scanning control on the first radio frequency coil 1 and detuning control on the second radio frequency coil 2 based on the target scanning area and depth information to control the first radio frequency coil 1 to scan, or performing scanning control on the second radio frequency coil 2 and detuning control on the first radio frequency coil 1 to control the second radio frequency coil 2 to scan; and a data processing module connected to the coil control module for acquiring scanning image signals scanned by the first radio frequency coil 1 and / or the second radio frequency coil 2, and performing image reconstruction based on the acquired scanning image signals.

[0036] Specifically, such as Figure 2 As shown, the coil control module in this invention has three control methods for the first RF coil and the second RF coil:

[0037] The first control method: When it is determined that only the first radio frequency coil is used for scanning based on the target scanning area and depth information, the coil control module controls the first radio frequency coil to scan and controls the second radio frequency coil to be in a detuned state. The data processing module acquires the scanning image signal of the first radio frequency coil and performs image reconstruction based on the scanning image signal.

[0038] The second control method: When it is determined that only the second radio frequency coil is used for scanning based on the target scanning area and depth information, the coil control module controls the second radio frequency coil to scan and controls the first radio frequency coil to be in a detuned state. The data processing module acquires the scanning image signal of the second radio frequency coil and performs image reconstruction based on the scanning image signal.

[0039] The third control method: When it is determined that a first radio frequency coil and a second radio frequency coil will be used for scanning based on the target scanning location and depth information, the coil control module controls the first radio frequency coil to scan and controls the second radio frequency coil to be in a detuned state. The scanning image signal of the first radio frequency coil is temporarily stored. The coil control module controls the second radio frequency coil to scan and controls the first radio frequency coil to be in a detuned state. The data processing module superimposes the scanning image signal of the second radio frequency coil and the scanning image signal of the first radio frequency coil, and performs image reconstruction on the superimposed scanning image signal.

[0040] To better illustrate the control method of the coil structure used in this patent, combined with Figure 3 The following examples will be described.

[0041] In some embodiments of the present invention, the first radio frequency coil and the second radio frequency coil each include: a plurality of radio frequency coil units and radio frequency coil control circuits connected to each radio frequency coil unit. The size of the radio frequency coil unit determines the scanning imaging depth, and the number of radio frequency coil units determines the scanning range. Specifically, the present invention can automatically or manually select the number of radio frequency coil units for scanning based on the selected scanning site or tissue.

[0042] It should be noted that the size, quantity, type, and model of the radio frequency coil unit can be selected according to the imaging depth and range requirements of the magnetic resonance imaging site or tissue, and this invention does not impose any limitations.

[0043] In some embodiments of the present invention, the radio frequency coil control circuit includes: a detuning circuit, a coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor;

[0044] Specifically, such as Figure 3As shown, the RF coil unit of the first RF coil includes: a detuning circuit, a first coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor; one end of the first inductor of the RF coil unit is connected to the detuning circuit, and the other end is connected to the first terminal of the first capacitor and the detuning current input terminal of the system control device; the other end of the first capacitor is grounded; the other end of the detuning circuit is connected in series with the input terminal of the coil unit preamplifier via the RF coil unit; the output terminal of the coil unit preamplifier is connected to one end of the second inductor and one end of the second capacitor, and the second inductor and the second capacitor are connected in parallel; the other end of the second inductor and the second capacitor is connected to the power supply and signal receiving terminal of the system control device; preferably, the first inductor and the second inductor are RF chokes, which have a better effect of passing DC and blocking AC signals.

[0045] It should be noted that the model and parameters of the coil unit preamplifier, first inductor, second inductor, first capacitor and second capacitor of the first RF coil can be determined according to actual needs, and the present invention does not limit them.

[0046] The second RF coil unit includes: a detuning circuit, a second coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor; one end of the first inductor of the second RF coil unit is connected to the detuning circuit, and the other end is connected to the first terminal of the first capacitor and the detuning current input terminal of the system control device; the other end of the first capacitor is grounded; the detuning circuit is connected in series with the input terminal of the coil unit preamplifier via the connection of the RF coil unit to the other end of the first inductor; the output terminal of the coil unit preamplifier is connected to one end of the second inductor and one end of the second capacitor, and the second inductor and the second capacitor are connected in parallel; the other end of the second inductor and the second capacitor is connected to the power supply and signal receiving terminal of the system control device; preferably, the first inductor and the second inductor are RF chokes, which have a better effect of passing DC and blocking AC signals.

[0047] It should be noted that the model and parameters of the coil unit preamplifier, first inductor, second inductor, first capacitor and second capacitor of the second RF coil can be determined according to actual needs, and the present invention does not limit them.

[0048] In some embodiments of the present invention, the method of scanning control of the first radio frequency coil and detuning control of the second radio frequency coil includes: sending a scanning control signal to one or more radio frequency coil control circuits of the first radio frequency coil to cause the corresponding radio frequency coil unit to scan, and sending a detuning control signal to the remaining radio frequency coil control circuits; sending a detuning control signal to each radio frequency coil control circuit of the second radio frequency coil to detune the second radio frequency coil.

[0049] Specifically, such as Figure 3 As shown, when scanning control is performed on the first RF coil and detuning control is performed on the second RF coil, the system control device sends a +100mA detuning current to each RF coil unit of the first RF coil that is not scanning and each RF coil unit of the second RF coil through the detuning current input terminal, so that the detuning loop impedance of the corresponding RF coil control circuit becomes high, and the RF coil unit of the first RF coil that is not scanning and the second RF coil are in an open circuit state; the system control device also provides a 10V operating voltage to the coil unit preamplifier of each RF coil unit of the first RF coil that is scanning through the power supply and signal receiving terminal and receives the scanning image signal from each RF coil unit of the first RF coil that is scanning.

[0050] It should be noted that the system control device may provide the operating voltage of the coil unit preamplifier to the RF coil unit that does not scan the first RF coil and to each RF coil unit of the second RF coil, or it may not provide the operating voltage.

[0051] In some embodiments of the present invention, the method of scanning control of the second radio frequency coil and detuning control of the first radio frequency coil includes: sending a scanning control signal to one or more radio frequency coil control circuits of the second radio frequency coil to cause the corresponding radio frequency coil unit to scan, and sending a detuning control signal to the remaining radio frequency coil control circuits; sending a detuning control signal to each radio frequency coil control circuit of the first radio frequency coil to detune the first radio frequency coil.

[0052] Specifically, such as Figure 3As shown, when scanning control is performed on the second RF coil and detuning control is performed on the first RF coil, the system control device sends a +100mA detuning current to the RF coil units of the second RF coil that are not scanning and to each RF coil unit of the first RF coil through the detuning current input terminal, so that the detuning loop impedance of the corresponding RF coil control circuit becomes high, and the RF coil units of the second RF coil that are not scanning and the first RF coil are in an open circuit state; the system control device also provides a 10V operating voltage to the coil unit preamplifier of each RF coil unit of the second RF coil that is scanning through the power supply and signal receiving terminal and receives the scanning image signal from each RF coil unit of the second RF coil that is scanning.

[0053] It should be noted that the system control device may provide the operating voltage of the coil unit preamplifier to the RF coil unit that does not scan the second RF coil and to each RF coil unit of the first RF coil, or it may not provide the operating voltage.

[0054] In some embodiments of the present invention, the data processing module performs the following three corresponding processing methods based on the three control methods of the coil control module for the first and second radio frequency coils described in the above embodiments:

[0055] The first processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the first radio frequency coil, and reconstructing the image based on the acquired scanned image signal;

[0056] The second processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the second radio frequency coil, and performing image reconstruction based on the acquired scanned image signal;

[0057] The third processing method includes: acquiring the signals scanned by the radio frequency coil unit scanning in the first radio frequency coil and the second radio frequency coil, and reconstructing the image based on the acquired scanned image signals.

[0058] To better describe a radio frequency coil scanning control system for magnetic resonance imaging, combined with Figure 4 The following specific embodiments are described.

[0059] Example 1: A working process of an radio frequency coil system for magnetic resonance imaging.

[0060] The coil is inserted into the plug of the MRI system. The system identifies and reads the coil's ID information. Based on the coil's ID information, the user interface displays the preset scanning area or tissue range for that coil. The user selects the area or tissue to be scanned based on the provided range. Based on the user-selected scanning area or tissue, the system control device controls the radio frequency coil unit required for this scan to perform the scan and obtain the scan image signal. Then, based on the obtained scan image signal, image reconstruction is performed to obtain the final scan image.

[0061] like Figure 5 The diagram shown is a flowchart of a radio frequency coil scanning control method for magnetic resonance imaging according to an embodiment of the present invention.

[0062] The control method, applied to an RF coil, includes: a first RF coil and a second RF coil, and the method includes:

[0063] Step S1: Obtain the input target scanning area and depth information;

[0064] The target scanning area and depth information includes: the area or tissue selected by the user for scanning in this scan, and the scanning depth.

[0065] Step S2: Based on the target scanning area and depth information, perform scanning control or detuning control on the first RF coil and the second RF coil respectively to obtain the scanning image signal scanned by the first RF coil and / or the second RF coil;

[0066] In some embodiments of the present invention, the first radio frequency coil and the second radio frequency coil each include: a plurality of radio frequency coil units and a radio frequency coil control circuit connected to each radio frequency coil unit; the radio frequency coil control circuit includes: a detuning circuit, a coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor;

[0067] Wherein, one end of the first inductor is connected to the detuned circuit, and the other end is connected to the first terminal of the first capacitor and the detuned current input terminal of the system control device; the other end of the first capacitor is grounded; the detuned circuit is connected in series with the input terminal of the coil unit preamplifier via the other end of the first inductor; the output terminal of the coil unit preamplifier is connected to one end of the second inductor and the second capacitor respectively, and the second inductor and the second capacitor are connected in parallel; the other ends of the second inductor and the second capacitor are connected to the power supply and signal receiving terminal of the system control device;

[0068] The method of scanning control of the first RF coil and detuning control of the second RF coil includes: sending a scanning control signal to one or more RF coil control circuits of the first RF coil to cause the corresponding RF coil unit to scan, and sending a detuning control signal to the remaining RF coil control circuits; sending a detuning control signal to each RF coil control circuit of the second RF coil to detune the second RF coil.

[0069] The method of scanning control of the second RF coil and detuning control of the first RF coil includes: sending a scanning control signal to one or more RF coil control circuits of the second RF coil to cause the corresponding RF coil unit to scan, and sending a detuning control signal to the remaining RF coil control circuits; sending a detuning control signal to each RF coil control circuit of the first RF coil to detune the first RF coil.

[0070] Step S3: Reconstruct the image based on the acquired scanned image signal.

[0071] In some embodiments of the present invention, there are three ways to reconstruct the image based on the acquired scanned image signal:

[0072] The first processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the first radio frequency coil, and reconstructing the image based on the acquired scanned image signal;

[0073] The second processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the second radio frequency coil, and reconstructing the image based on the acquired scanned image signal;

[0074] The third processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the first radio frequency coil and the second radio frequency coil, and reconstructing the image based on the acquired scanned image signal.

[0075] like Figure 6 The diagram shown is a structural schematic of the system control device in an embodiment of the present invention.

[0076] The system control device 6 includes a processor 62 and a memory 61; the memory 61 stores computer programs; the processor 62 executes the computer programs stored in the memory to cause the system control device to perform actions such as... Figure 5 The radio frequency coil scanning control method for magnetic resonance imaging.

[0077] Optionally, the number of memories 61 can be one or more, and the number of processors 62 can be one or more. Figure 6 Each example is taken as an instance.

[0078] Optionally, the processor 62 in the system control device will perform the following... Figure 5 The steps described involve loading one or more instructions corresponding to the process of an application into memory 61, and having the processor 62 run the application stored in the first memory 61, thereby achieving the following: Figure 5 Various functions in the radio frequency coil scanning control method for magnetic resonance imaging.

[0079] Optionally, the memory 61 may include, but is not limited to, high-speed random access memory and non-volatile memory. For example, one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices; the processor 62 may include, but is not limited to, a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0080] Optionally, the processor 62 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0081] The present invention also provides a computer-readable storage medium storing a computer program, wherein the computer program, when executed, implements as follows: Figure 5The radio frequency coil scanning control method for magnetic resonance imaging is described above. The computer-readable storage medium may include, but is not limited to, floppy disks, optical disks, CD-ROMs (Read-Only Optical Disk Memory), magneto-optical disks, ROMs (Read-Only Memory), RAMs (Random Access Memory), EPROMs (Erasable Programmable Read-Only Memory), EEPROMs (Electrically Erasable Programmable Read-Only Memory), magnetic cards or optical cards, flash memory, or other types of media / machine-readable media suitable for storing machine-executable instructions. The computer-readable storage medium may be a product not connected to a computer device or a component used with a computer device.

[0082] In some embodiments of the present invention, the computer-readable and writable storage medium may include read-only memory, random access memory, EEPROM, CD-ROM or other optical disc storage devices, disk storage devices or other magnetic storage devices, flash memory, USB flash drive, portable hard drive, or any other medium capable of storing desired program code having an instruction or data structure form and accessible by a computer. Additionally, any connection may be suitably referred to as a computer-readable medium. For example, if instructions are transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. However, it should be understood that computer-readable and writable storage media and data storage media do not include connections, carrier waves, signals, or other transient media, but are intended for non-transient, tangible storage media. The disks and optical discs used in the application include compact discs (CDs), laser discs, optical discs, digital multifunction discs (DVDs), floppy disks, and Blu-ray discs, where disks typically copy data magnetically, while optical discs use lasers to copy data optically.

[0083] like Figure 7 The diagram shown is a schematic diagram of a coil structure used for magnetic resonance imaging in an embodiment of the present invention.

[0084] The coil includes a first radio frequency coil and a second radio frequency coil disposed on a substrate; specifically, the first radio frequency coil and the second radio frequency coil are arranged on the same substrate surface; for example, the first radio frequency coil and the second radio frequency coil may be arranged on the same side, opposite side or staggered on the substrate.

[0085] The first and second radio frequency coils each include: a plurality of radio frequency coil units and radio frequency coil control circuits connected to each radio frequency coil unit; wherein, the size of the radio frequency coil unit determines the scanning imaging depth, and the number of radio frequency coil units determines the scanning range. Specifically, the present invention can automatically or manually select the number of radio frequency coil units for scanning based on the selected scanning site or tissue.

[0086] The radio frequency coil control circuit includes: a detuned circuit, a coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor; one end of the first inductor is connected to the detuned circuit, and the other end is connected to the first terminal of the first capacitor and the detuned current input terminal of the system control device; the other end of the first capacitor is grounded; the other end of the detuned circuit is connected in series with the input terminal of the coil unit preamplifier via the radio frequency coil unit; the output terminal of the coil unit preamplifier is connected to one end of the second inductor and one end of the second capacitor, and the second inductor and the second capacitor are connected in parallel; the other ends of the second inductor and the second capacitor are connected to the power supply and signal receiving terminal of the system control device.

[0087] It should be noted that the radio frequency coil control circuit is connected to and integrated with the radio frequency coil on the same substrate. Figure 7 It is not shown in the image.

[0088] Since the RF coil in this embodiment can achieve all the functions of the RF coil mentioned in the above embodiments, it will not be repeated here.

[0089] To better illustrate the structure of the coil in this invention, the following specific embodiments are provided.

[0090] Example 2: A radio frequency coil for magnetic resonance imaging.

[0091] Based on the imaging depth requirements of the imaging site or tissue, commonly used large and small flexible coils are selected and placed on the same substrate. The large flexible coils consist of a 2×4 RF coil unit matrix, with each unit being a square with a side length of approximately 14cm or a circle with a diameter of approximately 14cm. The small flexible coils consist of a 3×5 RF coil unit matrix, with each unit being a square with a side length of approximately 10cm or a circle with a diameter of approximately 10cm. Each RF coil unit of both the large and small flexible coils is connected via... Figure 4 The radio frequency coil control circuit shown is connected to the system control device.

[0092] Example 3: A radio frequency coil for magnetic resonance imaging.

[0093] Based on the imaging depth requirements of the imaging site or tissue, clinically commonly used head coils and maxillofacial coils (brain skin coils) are selected and placed on the same substrate covering the shape of the head. The maxillofacial coil uses a small, flexible coil, consisting of a matrix of 32 radiofrequency coil units, each approximately 7cm in size (square) or 7cm in diameter (circle). The head coil consists of a matrix of 12 radiofrequency coil units, each approximately 20cm in size (square) or 20cm in diameter (circle). Each radiofrequency coil unit of both the head and maxillofacial coils is connected via... Figure 4 The radio frequency coil control circuit shown is connected to the system control device.

[0094] In summary, this application provides a radio frequency coil scanning control system, method, apparatus, and radio frequency coil for magnetic resonance imaging. The system control device performs scanning control or detuning control on the first and second radio frequency coils based on the target scanning location and depth information to obtain scanning image signals from the first and / or second radio frequency coils, and then performs image reconstruction. This invention eliminates the need for frequent coil replacements during single-nucleoside magnetic resonance scanning, improving clinical efficiency and reducing mechanical costs. Therefore, this application effectively overcomes the various shortcomings of the prior art and has high industrial applicability.

[0095] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A radio frequency coil scanning control system for magnetic resonance imaging, characterized in that, include: The first radio frequency coil, the second radio frequency coil, and the system control device; The system control device is connected to the first radio frequency coil and the second radio frequency coil, and is used to perform scanning control or detuning control on the first radio frequency coil and the second radio frequency coil respectively based on the target scanning part and depth information, so as to obtain the scanning image signal scanned by the first radio frequency coil and / or the second radio frequency coil, and perform image reconstruction. The system control device includes: an information input module for acquiring input target scanning area and depth information; a coil control module connected to the information input module for controlling the first radio frequency coil to scan and the second radio frequency coil to detune based on the target scanning area and depth information, or controlling the second radio frequency coil to scan and the first radio frequency coil to detune; and a data processing module connected to the coil control module for acquiring scan image signals from the first radio frequency coil and / or the second radio frequency coil, and performing image reconstruction based on the acquired scan image signals; wherein the first radio frequency coil and the second radio frequency coil each include: multiple radio frequency coil units and radio frequency coil control circuits connected to each radio frequency coil unit; The radio frequency coil control circuit includes: a detuned circuit, a coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor; wherein, one end of the first inductor is connected to the detuned circuit, and the other end is connected to one end of the first capacitor and the detuned current input terminal of the system control device; the other end of the first capacitor is grounded; the other end of the detuned circuit is connected in series with the input terminal of the coil unit preamplifier via the radio frequency coil unit; the output terminal of the coil unit preamplifier is connected to one end of the second inductor and one end of the second capacitor, and the second inductor and the second capacitor are connected in parallel; the other ends of the second inductor and the second capacitor are connected to the power supply and signal receiving terminal of the system control device.

2. The system according to claim 1, characterized in that, The methods for scanning control of the first RF coil and detuning control of the second RF coil include: A scan control signal is sent to one or more RF coil control circuits of the first RF coil to cause the corresponding RF coil unit to scan, and a detuning control signal is sent to the remaining RF coil control circuits. Detuning control signals are sent to each radio frequency coil control circuit of the second radio frequency coil to perform detuning control on the second radio frequency coil.

3. The system according to claim 1, characterized in that, The methods for scanning control of the second RF coil and detuning control of the first RF coil include: A scan control signal is sent to one or more RF coil control circuits of the second RF coil to cause the corresponding RF coil unit to scan, and a detuning control signal is sent to the remaining RF coil control circuits. Detuning control signals are sent to each radio frequency coil control circuit of the first radio frequency coil to perform detuning control on the first radio frequency coil.

4. The system according to claim 2 or 3, characterized in that, The data processing module is used to perform any of the following processing methods: The first processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the first radio frequency coil, and reconstructing the image based on the acquired scanned image signal; The second processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the second radio frequency coil, and reconstructing the image based on the acquired scanned image signal; The third processing method includes: acquiring the signal scanned by the radio frequency coil unit scanning in the first radio frequency coil and the second radio frequency coil, and reconstructing the image based on the acquired scanned image signal.

5. A radio frequency coil scanning control method for magnetic resonance imaging, characterized in that, The method is applied to the radio frequency coil scanning control system for magnetic resonance imaging as described in claim 1; the radio frequency coil includes: a first radio frequency coil and a second radio frequency coil, the method comprising: Acquire target scanning area and depth information; Based on the target scanning area and depth information, scanning control or detuning control is performed on the first RF coil and the second RF coil respectively to obtain the scanning image signal scanned by the first RF coil and / or the second RF coil. Image reconstruction is performed based on the acquired scanned image signals.

6. A system control device, characterized in that, include: Processor and memory; The memory is used to store computer programs; The processor is configured to execute the computer program stored in the memory to cause the system control device to perform the method as described in claim 5.

7. A radio frequency coil for magnetic resonance imaging, characterized in that, include: A first radio frequency coil and a second radio frequency coil are disposed on the substrate; The first radio frequency coil and the second radio frequency coil each include: a plurality of radio frequency coil units and a radio frequency coil control circuit that is connected to each radio frequency coil unit. The radio frequency coil control circuit includes: a detuning circuit, a coil unit preamplifier, a first inductor, a second inductor, a first capacitor, and a second capacitor; One end of the first inductor is connected to the detuned circuit, and the other end is connected to one end of the first capacitor and the detuned current input terminal of the system control device; the other end of the first capacitor is grounded; the detuned circuit is connected in series with the input terminal of the coil unit preamplifier via the RF coil unit; the output terminal of the coil unit preamplifier is connected to one end of the second inductor and one end of the second capacitor, and the second inductor and the second capacitor are connected in parallel; the other ends of the second inductor and the second capacitor are connected to the power supply and signal receiving terminal of the system control device.

Images