Magnetic resonance system shimming assembly and magnetic resonance system

Abstract

The utility model relates to a magnetic resonance system shimming assembly and a magnetic resonance system. The magnetic resonance system shimming assembly comprises a shimming base body and a shimming piece, the shimming base body is connected with the hole wall of a magnet hole of a gradient coil, the shimming base body is located between a superconducting magnet and the gradient coil, the shimming base body comprises a shielding layer, and the shielding layer is arranged in the circumferential direction of the superconducting magnet in a surrounding mode so as to be used for shielding interference signals. The shimming base body is provided with a plurality of installation grooves which are arranged at intervals in the circumferential direction of the superconducting magnet, and the installation grooves are located on the outer side of the shielding layer. The shimming pieces correspond to the mounting grooves in number, and each shimming piece is inserted into the corresponding mounting groove. The shielding layer is arranged around the superconducting magnet in the circumferential direction, and the shielding layer is located on the side, close to the gradient coil, of the installation groove so as to shield interference signals generated by collision of the shimming piece and the shimming base body under vibration generated by working of the gradient coil, and therefore the imaging quality of images is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical imaging, in particular to a magnetic resonance system shim component and a magnetic resonance system. Background Art

[0002] With the development of biomedical engineering and medical imaging, magnetic resonance imaging (MRI), as another important medical diagnostic technology after computerized X-ray tomography, plays an increasingly important role in medical diagnosis.

[0003] In existing MRI equipment, to improve the uniformity and stability of the magnetic field, a shim assembly is often provided. This shim assembly is placed between the superconducting magnet and the trapezoidal coil, bringing it closer to the superconducting magnet. This allows the shim assembly to shield the stray field generated by the main coil of the gradient coil, reducing the spread of the stray field into the superconducting magnet and the eddy current heating within the superconducting magnet caused by the stray field. This addresses the current quenching problem caused by heat generated by continuous eddy currents within the superconducting coil. However, because the shims and the entire structure of the shim assembly are made of metal, the components may collide with each other when the gradient coil vibrates during operation, causing sparks and affecting the imaging quality of the MRI equipment. Utility Model Content

[0004] Based on this, it is necessary to set shims between the superconducting magnet and the trapezoidal coil in order to improve the uniformity and stability of the magnetic field in the MRI equipment. However, the shims and the entire mechanism are made of metal materials. When the gradient coil vibrates during operation, the components will collide with each other, causing sparks and affecting the imaging quality of the MRI equipment. Therefore, a magnetic resonance system shim component is provided.

[0005] A magnetic resonance system shimming component, comprising:

[0006] a shim base connected to a wall of a magnet hole of the superconducting magnet and located between the superconducting magnet and the gradient coil; the shim base including a shielding layer disposed circumferentially around the superconducting magnet to shield interference signals; and a plurality of mounting slots disposed at intervals circumferentially around the superconducting magnet on the shim base, the mounting slots being located outside the shielding layer;

[0007] The number of the shimming pieces corresponds to the number of the installation slots, and each shimming piece is inserted into the corresponding installation slot.

[0008] In one embodiment, the shim matrix further includes a connecting layer, which is arranged around the circumference of the superconducting magnet. The connecting layer is located on a side of the mounting slot away from the shielding layer, and is used to connect to the hole wall of the magnet hole.

[0009] In one embodiment, the shim base includes a shim cylinder, an inner cylinder wall of the shim cylinder is configured as the shielding layer, an outer cylinder wall of the shim cylinder is configured as the connecting layer, and the mounting groove is located on the cylinder wall of the shim cylinder.

[0010] In one embodiment, the shim base has a plurality of cooling channels arranged at intervals around the circumference of the superconducting magnet, and the cooling channels have an inlet and an outlet. The inlet is used to allow a cooling medium to pass through, and the outlet is used to guide the cooling medium into the cooling mechanism.

[0011] In one embodiment, the cooling channel is provided between two adjacent mounting grooves, and the inlet and the outlet of each cooling channel are located on the same side of the shim base.

[0012] In one embodiment, the cooling channel includes a cooling hole, a liquid inlet pipe and a liquid outlet pipe. The cooling hole is arranged on the uniform field base and is located on the outside of the shielding layer. The liquid inlet pipe and the liquid outlet pipe are respectively connected to the two ends of the cooling hole. The inlet is located on the liquid inlet pipe, and the outlet is located on the liquid outlet pipe.

[0013] In one embodiment, the shim element includes a first shim bar and two second shim bars arranged on both sides of the first shim bar, the first shim bar and the second shim bar each include a plurality of shim plates and a carrier for carrying the shim plates, and the weight of the shim plates included in the first shim bar is greater than the weight of the shim plates included in the second shim bar.

[0014] In one embodiment, the magnetic resonance system shim assembly further includes a limit plate, which is detachably connected to the shim base and is used to block a notch of the installation slot to prevent the shim component in the installation slot from falling out.

[0015] The utility model also provides a magnetic resonance system, which can solve at least one of the above technical problems.

[0016] A magnetic resonance system comprising:

[0017] a superconducting magnet having a magnet bore;

[0018] a gradient coil disposed in the magnet bore;

[0019] a shim matrix, located between the superconducting magnet and the gradient coil, and connected to the wall of the magnet hole;

[0020] The shim base has a plurality of mounting grooves arranged at intervals around the circumference of the superconducting magnet, and the notches of the mounting grooves face the hole wall of the magnet hole;

[0021] The number of the shimming pieces corresponds to the number of the installation slots, and each shimming piece is inserted into the corresponding installation slot.

[0022] In one embodiment, a shielding layer is provided on the end surface of the shim substrate facing the gradient coil, so as to shield the gradient coil from external interference signals.

[0023] Beneficial effects:

[0024] The magnetic resonance system shim assembly provided by the embodiment of the present invention includes a shim base and shim pieces. The shim base is connected to the hole wall of the magnet hole of the gradient coil and is located between the superconducting magnet and the gradient coil. The shim base includes a shielding layer, which is arranged around the circumference of the superconducting magnet to shield interference signals. The shim base has a plurality of mounting slots arranged at intervals around the circumference of the superconducting magnet, and the mounting slots are located outside the shielding layer. The number of shim pieces corresponds to the number of mounting slots, and each shim piece is inserted into a corresponding mounting slot. In the present application, the shim base is located between the superconducting magnet and the gradient coil, and the shim element is inserted into the mounting groove of the shim base, thereby improving the uniformity of the magnetic field formed by the superconducting magnet. A shielding layer is arranged circumferentially around the superconducting magnet, and the shielding layer is located on the side of the mounting groove close to the gradient coil to shield the interference signal generated by the collision between the shim element and the shim base under the vibration generated by the operation of the gradient coil, thereby improving the image quality. At the same time, the shielding layer can also isolate most of the heat generated by the operation of the gradient coil, preventing it from being directly transferred to the shim element, causing temperature changes between the shim element and the superconducting magnet, and further causing the magnetic field drift problem.

[0025] The present invention also provides a magnetic resonance system comprising a superconducting magnet, a gradient coil, and a shim matrix. The superconducting magnet has a magnet bore; the gradient coil is disposed in the magnet bore; the shim matrix is ​​located between the superconducting magnet and the gradient coil and connected to the wall of the magnet bore; the shim matrix has a plurality of mounting slots spaced circumferentially around the superconducting magnet, with the slot openings facing the wall of the magnet bore; the number of shims corresponds to the number of mounting slots, and each shim is inserted into a corresponding mounting slot. This magnetic resonance system can achieve at least one of the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a magnetic resonance system shim assembly provided in one embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the cooperation between the magnetic resonance system shim assembly, the superconducting magnet and the gradient coil provided in one embodiment of the present invention.

[0028] Figure 3 This is a partial schematic diagram of the cooperation between the magnetic resonance system shim assembly and the superconducting magnet provided by one embodiment of the present invention.

[0029] Figure 4 A partial schematic diagram of a magnetic resonance system shim assembly provided in one embodiment of the present invention.

[0030] Figure 5 This is a partially expanded front view of the cooperation between the magnetic resonance system shim assembly and the superconducting magnet provided by one embodiment of the utility model.

[0031] Figure 6 A partially expanded side view of a magnetic resonance system shim assembly provided by an embodiment of the present invention.

[0032] Figure 7 A schematic diagram of a shim component in a shim assembly of a magnetic resonance system provided by an embodiment of the present invention.

[0033] Figure Number:

[0034] 100-uniform field matrix; 110-shielding layer; 120-mounting slot; 130-connecting layer; 140-cooling channel; 141-cooling hole; 142-liquid inlet pipe; 143-liquid outlet pipe; 144-inlet; 145-outlet; 146-return water pipe; 150-mounting hole; 200-uniform field component; 210-first uniform field strip; 220-second uniform field strip; 221-uniform field sheet; 222-carrier; 230-limiting plate; 300-superconducting magnet; 310-magnet hole; 400-gradient coil. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0041] See Figure 1 、 Figure 2 and Figure 3 , Figure 1 A schematic diagram of a magnetic resonance system shim assembly provided in one embodiment of the present invention. Figure 2 This is a schematic diagram of the cooperation between the magnetic resonance system shim assembly, the superconducting magnet and the gradient coil provided in one embodiment of the present invention. Figure 3 A partial schematic diagram of the cooperation between a shimming assembly of a magnetic resonance system and a superconducting magnet provided in one embodiment of the present invention is provided. The shimming assembly of a magnetic resonance system provided in one embodiment of the present invention includes a shimming base 100 and shimming components 200. The shimming base 100 is connected to the wall of a magnet bore 310 of a superconducting magnet 300 and is located between the superconducting magnet 300 and the gradient coil 400. The shimming base 100 includes a shielding layer 110 that is arranged circumferentially around the superconducting magnet 300 to shield interference signals. The shimming base 100 has a plurality of mounting slots 120 that are spaced apart circumferentially around the superconducting magnet 300 and are located outside the shielding layer 110. The number of shimming components 200 corresponds to the number of mounting slots 120, and each shimming component 200 is inserted into a corresponding mounting slot 120.

[0042] Specifically, in the present application, the shim base 100 is located between the superconducting magnet 300 and the gradient coil 400, and the shim element 200 is inserted into the mounting groove 120 of the shim base 100, thereby improving the uniformity of the magnetic field formed by the superconducting magnet 300. A shielding layer 110 is arranged around the circumference of the superconducting magnet 300, and the shielding layer 110 is located on the side of the mounting groove 120 close to the gradient coil 400 to shield the shim element 200 and the shim base 100 from interference signals, such as electromagnetic signals, generated by the collision under the vibration generated by the operation of the gradient coil 400, thereby improving image quality. At the same time, the shielding layer 110 can also isolate most of the heat generated by the gradient coil 400 during operation, preventing it from being directly transferred to the shim element 200, causing temperature changes between the shim element 200 and the superconducting magnet 300, and further causing magnetic field drift problems.

[0043] Furthermore, the shim matrix 100 has an axial length equal to that of the superconducting magnet 300 and the gradient coil 400 , thereby stably isolating heat generated by the gradient coil 400 during operation and preventing the heat from being transferred to the superconducting magnet 300 .

[0044] It should be noted that the shim base 100 is connected to the superconducting magnet 300. The shim base 100 is provided with a mounting hole 150, and the gradient coil 400 is inserted into the mounting hole 150. That is, the shim base 100 is not fixed to the gradient coil 400. Therefore, when the gradient coil 400 is in operation, the vibration transmitted to the shim base 100 can be reduced, thereby improving the stability of the magnetic resonance system shim assembly installed between the magnetic conductor and the gradient coil 400.

[0045] See Figure 1 、 Figure 2 and Figure 3 In one embodiment, the shim base 100 further includes a connecting layer 130 , which is arranged around the circumference of the superconducting magnet 300 . The connecting layer 130 is located on a side of the mounting slot 120 away from the shielding layer 110 . The connecting layer 130 is used to connect to the wall of the magnet hole 310 .

[0046] Specifically, the provision of the connecting layer 130 increases the contact area between the shim base 100 and the wall of the magnet bore 310, thereby improving the stability of the shim base 100 and the superconducting magnet 300. Furthermore, the connecting layer 130 further isolates the heat generated by the gradient coil 400 during operation, preventing temperature variations between the shim 200 and the superconducting magnet 300, which could lead to magnetic field drift. Preferably, the connecting layer 130 is welded to the wall of the magnet bore 310.

[0047] See Figure 1 、 Figure 2 and Figure 3 In one embodiment, the shim base 100 includes a shim tube, the inner wall of the shim tube is configured as a shielding layer 110, the outer wall of the shim tube is configured as a connecting layer 130, and the mounting groove 120 is located on the wall of the shim tube.

[0048] Specifically, the gradient coil 400 is inserted into the cylinder hole of the shim cylinder, and the shim base 100 is a solid structure, thereby improving the stability of the shim base 100 and improving the heat insulation effect of the shim base 100 .

[0049] See Figure 1 、 Figure 2 and Figure 4 , Figure 4A partial schematic diagram of a magnetic resonance system shimming assembly according to one embodiment of the present invention. In one embodiment, a shimming base 100 includes a plurality of cooling channels 140 spaced circumferentially around a superconducting magnet 300. The cooling channels 140 have inlets 144 for admitting a cooling medium and outlets 145 for directing the cooling medium into the cooling mechanism.

[0050] Specifically, the cooling medium enters the cooling channel 140 through the inlet 144 and then flows out through the outlet 145, thereby forming a closed and complete cooling circulation system. The cooling medium promptly removes the heat from the shim base 100, thereby better isolating the heat generated by the gradient coil 400 and avoiding temperature changes between the shim 200 and the superconducting magnet 300, which in turn causes magnetic field drift problems.

[0051] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , Figure 5 A partially expanded front view of the magnetic resonance system shim assembly and superconducting magnet provided in one embodiment of the present invention. In one embodiment, the inlet 144 and outlet 145 of each cooling channel 140 are located on the same side of the shim base 100, facilitating the connection and removal of the cooling medium and effectively utilizing space. In other embodiments, the inlet 144 and outlet 145 may also be located at either end of the cooling hole 141.

[0052] See Figure 1 、 Figure 4 、 Figure 5 and Figure 6 , Figure 6 A partially expanded side view of a magnetic resonance system shim assembly according to one embodiment of the present invention. In one embodiment, a cooling channel 140 is provided between two adjacent mounting slots 120, thereby improving heat dissipation for the shim element 200 while also conserving radial space in the shim cylinder and reducing manufacturing costs. Preferably, a cooling channel 140 is provided between any two adjacent mounting slots 120.

[0053] participate Figure 1 、 Figure 4 、 Figure 5 and Figure 6 In one embodiment, the cooling channel 140 includes a cooling hole 141, a liquid inlet pipe 142, and a liquid outlet pipe 143. The cooling hole 141 is provided on the shim substrate 100 and is located outside the shielding layer 110. The liquid inlet pipe 142 and the liquid outlet pipe 143 are respectively connected to the two ends of the cooling hole 141. The inlet 144 is located on the liquid inlet pipe 142, and the outlet 145 is located on the liquid outlet pipe 143.

[0054] Specifically, the cooling holes 141 are provided on the wall of the shim cylinder, and the cooling medium introduced through the liquid inlet pipe 142 directly contacts the wall of the cooling holes 141 , that is, contacts the wall of the shim cylinder, thereby improving the heat dissipation effect of the shim cylinder.

[0055] In other embodiments, the cooling channel 140 includes a cooling pipe, which is disposed through the wall of the shim cylinder, and the inlet 144 and the outlet 145 are located on the cooling pipe.

[0056] participate Figure 1 、 Figure 4 、 Figure 5 and Figure 6 In one embodiment, each cooling channel 140 includes at least two cooling holes 141, which are arranged to extend through the cooling channel 140. The cooling channels 140 also include a water return pipe 146. The same side of at least two adjacent cooling holes 141 communicates with both ends of the water return pipe 146. Each liquid inlet pipe 142 and liquid outlet pipe 143 are located on the same side of the shim barrel. Preferably, the cooling holes 141 extend in the same direction as the mounting slot 120.

[0057] Furthermore, each cooling channel 140 includes two cooling holes 141 , and each cooling hole 141 is located on a side close to the corresponding mounting slot 120 , so as to improve the heat dissipation effect on the shim 200 .

[0058] See Figure 1 、 Figure 4 、 Figure 6 and Figure 7 In one embodiment, the shim element 200 includes a first shim bar 210 and two second shim bars 220 arranged on both sides of the first shim bar 210. The first shim bar 210 and the second shim bar 220 each include a plurality of shim pieces 221 and a carrier 222 for carrying the shim pieces 221. The weight of the shim pieces 221 included in the first shim bar 210 is greater than the weight of the shim pieces 221 included in the second shim bar 220.

[0059] Specifically, the weight of the shims 221 included in the first shim bar 210 is greater than the weight of the shims 221 included in the second shim bar 220, so that the second shim bar 220 can be pulled out of the mounting slot 120 more easily under the action of the magnetic field. This allows the first shim bar 210 to roughly adjust the magnetic field uniformity of the magnetic resonance system, and then the second shim bar 220 can be plugged in and out to adjust the number of shims 221 under the magnetic field to finely adjust the magnetic field uniformity of the magnetic resonance system. It can be understood that during the first shim adjustment, the heavier shims 221 are added to the first shim bar 210, and then the first shim bar 210 is no longer plugged in or out and remains in the mounting slot 120. After the second field raising process, the second shim bar 220 can be plugged in and out without lowering the field to add the lighter shims 221 to achieve field shimming, thereby reducing the number of shim adjustments for the shim assembly of the magnetic resonance system and improving operational efficiency. Preferably, the mounting groove 120 extends along the axial direction of the superconducting magnet 300 .

[0060] See Figure 1 、 Figure 3 、 Figure 4 and Figure 6 In one embodiment, the magnetic resonance system shim assembly further includes a limit plate 230, which is detachably connected to the shim base 100. The limit plate 230 is used to block the notch of the mounting slot 120 to prevent the shim component 200 in the mounting slot 120 from falling out.

[0061] Specifically, the mounting slot 120 is provided throughout, with a limiting plate 230 provided on both sides of the mounting slot 120. When the limiting plate 230 is connected to the shim barrel, the limiting plate 230 can block the notch of the mounting slot 120 to ensure that the shim element 200 does not move relative to the mounting slot 120 and fall out of the mounting slot 120 when subjected to a magnetic field force, thereby improving the reliability of the magnetic resonance system shim assembly. When the limiting plate 230 is disassembled from the shim barrel, the notch of the mounting slot 120 is released, allowing the second shim strip 220 to fall out, allowing the insertion of a smaller shim piece 221 to further achieve shim adjustment. Preferably, the limiting plate 230 is connected to the barrel wall of the shim barrel via fasteners such as screws.

[0062] participate Figure 1 、 Figure 2 and Figure 4The utility model further provides a magnetic resonance system, including a superconducting magnet 300, a gradient coil 400, and a shim base 100; the superconducting magnet 300 has a magnet hole 310; the gradient coil 400 is disposed in the magnet hole 310; the shim base 100 is located between the superconducting magnet 300 and the gradient coil 400, and is connected to the hole wall of the magnet hole 310; the shim base 100 has a plurality of mounting slots 120 arranged at intervals around the circumference of the superconducting magnet 300, with the slot openings of the mounting slots 120 facing the hole wall of the magnet hole 310; the number of shims 200 corresponds to the number of the mounting slots 120, and each shim 200 is inserted into a corresponding mounting slot 120.

[0063] Specifically, in the present application, the shim base 100 is located between the superconducting magnet 300 and the gradient coil 400 , and the shim element 200 is inserted into the mounting slot 120 of the shim base 100 , thereby improving the uniformity of the magnetic field formed by the superconducting magnet 300 .

[0064] participate Figure 1 、 Figure 2 and Figure 4 In one embodiment, a shielding layer 110 is provided on the end surface of the shim substrate 100 facing the gradient coil 400 to shield the gradient coil 400 from external interference signals.

[0065] Specifically, by providing a shielding layer 110 arranged circumferentially around the superconducting magnet 300, and the shielding layer 110 is located on the side of the mounting slot 120 close to the gradient coil 400, interference signals generated by the collision between the shim 200 and the shim base 100 due to the vibration generated by the operation of the gradient coil 400 are shielded, thereby improving image quality. At the same time, the shielding layer 110 can also isolate most of the heat generated by the gradient coil 400 during operation, preventing it from being directly transferred to the shim 200, causing temperature changes between the shim 200 and the superconducting magnet 300, and further causing magnetic field drift problems.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0067] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A magnetic resonance system shimming component, characterized in that: The magnetic resonance system shimming component comprises: A shim matrix (100) is connected to a hole wall of a magnet hole (310) of a superconducting magnet, and the shim matrix (100) is located between the superconducting magnet (300) and the gradient coil (400); the shim matrix (100) includes a shielding layer (110), and the shielding layer (110) is arranged around the circumference of the superconducting magnet (300) to shield interference signals; the shim matrix (100) has a plurality of mounting grooves (120) arranged at intervals around the circumference of the superconducting magnet (300), and the mounting grooves (120) are located outside the shielding layer (110); The number of the shimming pieces (200) corresponds to the number of the installation slots (120), and each shimming piece (200) is inserted into the corresponding installation slot (120).

2. The magnetic resonance system shimming assembly according to claim 1, characterized in that: The uniform field matrix (100) further comprises a connecting layer (130), the connecting layer (130) being arranged circumferentially around the superconducting magnet (300), the connecting layer (130) being located on a side of the mounting slot (120) away from the shielding layer (110), and the connecting layer (130) being used to connect to a hole wall of the magnet hole (310).

3. The magnetic resonance system shimming assembly according to claim 2, characterized in that: The shim base (100) comprises a shim cylinder, the inner cylinder wall of the shim cylinder is configured as the shielding layer (110), the outer cylinder wall of the shim cylinder is configured as the connecting layer (130), and the mounting groove (120) is located on the cylinder wall of the shim cylinder.

4. The magnetic resonance system shimming assembly according to any one of claims 1 to 3, characterized in that: The uniform field base (100) has a plurality of cooling channels (140) arranged at intervals in the circumferential direction around the superconducting magnet (300), and the cooling channels (140) have an inlet (144) and an outlet (145), the inlet (144) is used to introduce a cooling medium, and the outlet (145) is used to introduce the cooling medium into the cooling mechanism.

5. The magnetic resonance system shimming assembly according to claim 4, characterized in that: The cooling channel (140) is arranged between two adjacent mounting grooves (120), and the inlet (144) and the outlet (145) of each cooling channel (140) are located on the same side of the shim base (100).

6. The magnetic resonance system shimming assembly according to claim 4, characterized in that: The cooling channel (140) includes a cooling hole (141), a liquid inlet pipe (142) and a liquid outlet pipe (143); the cooling hole (141) is provided on the uniform field substrate (100) and is located outside the shielding layer (110); the liquid inlet pipe (142) and the liquid outlet pipe (143) are respectively connected to two ends of the cooling hole (141); the inlet (144) is located on the liquid inlet pipe (142), and the outlet (145) is located on the liquid outlet pipe (143).

7. The magnetic resonance system shimming assembly according to any one of claims 1 to 3, characterized in that: The shim element (200) comprises a first shim bar (210) and two second shim bars (220) arranged on both sides of the first shim bar (210); the first shim bar (210) and the second shim bar (220) both comprise a plurality of shim pieces (221) and a carrier (222) for carrying the shim pieces (221); and the weight of the shim pieces (221) included in the first shim bar (210) is greater than the weight of the shim pieces (221) included in the second shim bar (220).

8. The magnetic resonance system shimming assembly according to any one of claims 1 to 3, characterized in that: The magnetic resonance system shim assembly further includes a limit plate (230), the limit plate (230) being detachably connected to the shim base (100), and the limit plate (230) being used to block a notch of the installation slot (120) to prevent the shim component (200) in the installation slot (120) from falling out.

9. A magnetic resonance system, characterized in that: include: A superconducting magnet (300) having a magnet bore (310); A gradient coil (400) is disposed in the magnet hole (310); A shim matrix (100) is located between the superconducting magnet (300) and the gradient coil (400), and is connected to the hole wall of the magnet hole (310); The shim base (100) has a plurality of mounting slots (120) arranged at intervals in the circumferential direction around the superconducting magnet (300), and the slot openings of the mounting slots (120) face the hole wall of the magnet hole (310); The number of the shimming pieces (200) corresponds to the number of the installation slots (120), and each shimming piece (200) is inserted into the corresponding installation slot (120).

10. The magnetic resonance system according to claim 9, characterized in that A shielding layer (110) is provided on the end surface of the uniform field base (100) facing the gradient coil (400) to shield external interference signals to the gradient coil (400).

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