Cryoshield, superconducting magnet structure, and magnetic resonance system

Abstract

The application relates to a low-temperature holder, a superconducting magnet structure and a magnetic resonance system. The low-temperature holder comprises an outer container, an inner container arranged in the outer container and surrounding the outer container to form an installation space, and a heat shield layer arranged in the installation space; a surface of the inner container is provided with a first recessed part recessed to an inner side of the inner container, and / or a surface of the heat shield layer is provided with a second recessed part. In this way, the distance between the inner container and the outer container can be reduced, the overall size of the low-temperature holder can be reduced, the cost can be reduced, and the installation difficulty can be reduced.

Description

Technical Field

[0001] This invention relates to the field of magnetic resonance equipment technology, and in particular to a cryogenic holder, a superconducting magnet structure, and a magnetic resonance system. Background Technology

[0002] In magnetic resonance imaging (MRI) systems, superconducting magnets are typically superconducting coils immersed in liquid helium within a cryogenic chamber. This keeps the superconducting coils in a cryogenic superconducting state, and once energized, they generate a stable, strong magnetic field. The rectangular cross-section solenoid coil assembly is currently the most common coil structure in typical superconducting magnet structures. It consists of multiple inner coils and an outer magnet coil, with all coils wound within slots in a metal winding frame, and finally encapsulated in a hollow cylindrical cryogenic chamber.

[0003] Cryogenic holders are generally assembled from three concentric cylindrical cavities, including an innermost liquid helium container, an intermediate shielding cylinder, and an outer vacuum container. To maintain their relative positions and ensure stability, the inner container, shielding cylinder, and outer container are each equipped with several suspension and fixing components, which can securely suspend and fix the inner container and shielding cylinder to the outer container.

[0004] Because superconducting magnet coils are quite heavy—a typical 1.5T superconducting magnet coil weighs up to 2 tons, while a high-field superconducting magnet coil can weigh over ten tons or even tens of tons—this weight, along with the impact forces generated during transportation, will produce significant reaction forces on the support components and their fixing blocks. Therefore, the suspension fixing blocks need to have a specific shape and size, especially their thickness, which is typically over 30mm. This necessitates a larger gap between the shielding cylinder and the inner container to accommodate these symmetrically distributed suspension fixing blocks; this gap is usually 40–80mm.

[0005] Typically, for a specific superconducting magnet, its coil design is determined by the magnet parameters (such as the size and uniformity of the central magnetic field uniform region). Once the magnet parameters are determined, the dimensions of the inner and outer coils are also determined. For example, the outer diameter of the coils for 1.5T and 3.0T superconducting magnets used for whole-body imaging is usually around 1.6 to 2 meters. In addition, the diameter of the magnet coil is significantly larger than that of the inner coil and is mainly distributed at both ends of the inner container, close to its outer cylinder. Furthermore, the role of the magnet coil in electromagnetic design is mainly to reduce the range of the magnet's escape field (usually referring to a magnetic field with a strength of Gauss), thereby reducing the size restrictions of the installation site on the superconducting magnet. Typically, a 1.5T whole-body imaging MRI device requires an installation site size of 2.5 x 4 meters (centered on the magnet, XY plane, single axis) based on the Gaussian escape field, while a 5T whole-body imaging MRI device requires an installation site size of 5 x 6 meters. For the design of coils in superconducting magnets, especially high-field superconducting magnets, the width of the outer magnet coil along the central axis of the container should be as wide as possible, which can help reduce the escaping field to some extent.

[0006] On the other hand, for a coil of a fixed size, the size of the inner container that it matches is also basically fixed. Since the suspension fixing block occupies the gap between the shielding cylinder and the inner container, the shielding cylinder and the vacuum outer container need to be enlarged accordingly, that is, the outer diameter and length of the container should also be increased accordingly. However, with the increase of these dimensions, the overall shape of the superconducting magnet becomes larger, more materials are used, the cost increases, and the installation difficulty is also increased, such as the need for a ground-mounted platform or a raised platform, making installation and use inconvenient. Summary of the Invention

[0007] Therefore, it is necessary to address the issue that the connection between the inner container and the outer container via a suspension support increases the overall size of the superconducting magnet, and to provide a cryogenic holder, superconducting magnet structure, and magnetic resonance system that can reduce the overall size of the device.

[0008] A low-temperature holder, comprising:

[0009] An outer container having a hollow magnet hole;

[0010] The inner container is disposed within the outer container and together with the outer container forms an installation space; and

[0011] A heat shield layer is disposed in the installation space;

[0012] The surface of the inner container has a first recessed portion that is recessed toward the inner side of the inner container, and / or the surface of the heat shield layer has a second recessed portion that is recessed toward the inner container, and the first recessed portion and the second recessed portion are correspondingly arranged.

[0013] In one embodiment, the first recess includes a first recessed area and / or a third recessed area, the first recessed area being disposed in the central region of the inner container, and the third recessed area being disposed at the edge of the inner container;

[0014] The second recess includes a second recessed area and / or a fourth recessed area, wherein the second recessed area is provided corresponding to the first recessed area, and the fourth recessed area is provided corresponding to the second recessed area.

[0015] In one embodiment, the first recessed area includes a first transition section and a first recessed section, the first recessed section being recessed into the surface of the inner container, and the first transition section transitionally connecting the two sides of the first recessed section with the surface of the inner container.

[0016] In one embodiment, the second recessed area includes a second transition section and a second recessed section, the second recessed section being recessed into the surface of the inner container, and the second transition section transitionally connecting the two sides of the first recessed section with the surface of the heat shield layer.

[0017] In one embodiment, the cryogenic holder further includes:

[0018] The support structure includes a first support member and a second support member. One end of the first support member is disposed in the first recess and the other end is connected to the outer container. One end of the second support member is disposed in the second recess and the other end is connected to the outer container.

[0019] In one embodiment, the support structure further includes a first fixing block, which is disposed in a first recessed area, and one end of the first support member is connected to the first fixing block;

[0020] The support structure further includes a second fixing block, which is disposed in the second transition section, and one end of the second support member is connected to the second recessed area.

[0021] In one embodiment, the first recessed area is disposed at the edge of the inner container, the second recessed area is disposed at the edge of the heat shield layer, one end of the first support member is connected to the periphery or end of the outer container, and one end of the second support member is connected to the periphery or end of the outer container.

[0022] A superconducting magnet structure includes a cryogenic holder and a magnet assembly, wherein the magnet assembly is disposed within the cryogenic holder, and the cryogenic holder includes:

[0023] An outer container having a hollow magnet hole;

[0024] The inner container is disposed within the outer container and together with the outer container forms an installation space;

[0025] A heat shield layer is disposed in the installation space; the surface of the inner container has a first recessed portion recessed towards the inner side of the inner container, the surface of the heat shield layer has a second recessed portion, and / or, the second recessed portion is recessed towards the inner container, and the first recessed portion and the second recessed portion are correspondingly disposed.

[0026] In one embodiment, the magnet assembly includes a first magnet coil and a second magnet coil, the outer diameter of the first magnet coil being larger than the outer diameter of the second magnet coil, the first magnet coil being disposed in the inner container, and the second magnet coil being disposed corresponding to the first recess.

[0027] A magnetic resonance system includes a superconducting magnet structure and a cryostat, the cryostat being disposed within the superconducting magnet structure for cooling the excitation coil of the superconducting magnet structure; the superconducting magnet structure includes a cryostat and a magnet assembly, the magnet assembly being disposed within the cryostat, the cryostat comprising:

[0028] An outer container having a hollow magnet hole;

[0029] The inner container is disposed within the outer container and together with the outer container forms an installation space;

[0030] A heat shield layer is disposed in the installation space; the surface of the inner container has a first recessed portion recessed towards the inner side of the inner container, the surface of the heat shield layer has a second recessed portion, and / or, the second recessed portion is recessed towards the inner container, and the first recessed portion and the second recessed portion are correspondingly disposed; and

[0031] The support structure includes a first support member and a second support member. One end of the first support member is disposed in the first recess and the other end is connected to the outer container. One end of the second support member is disposed in the second recess and the other end is connected to the outer container.

[0032] By adopting the above technical solution, the present invention has at least the following technical effects:

[0033] The cryogenic holder, superconducting magnet structure, and magnetic resonance system of the present invention have a first recessed portion on the surface of the inner container and a second recessed portion on the surface of the heat shield layer. The first and second recessed portions are positioned correspondingly. A first support member of the support structure connects the inner container and the outer container at the first recessed portion, and a second support member connects the heat shield layer and the outer container at the second recessed portion. The first recessed portion can accommodate a portion of the first support member, and the second recessed portion can accommodate a portion of the second support member. This ensures reliable support for the first and second support members while reducing the distance between the inner container and the outer container, thereby reducing the overall size of the cryogenic holder, reducing the amount of material used, lowering costs, and simplifying installation. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a magnet assembly installed in a cryogenic holder according to an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A partially enlarged view of the magnet assembly installed in the cryogenic holder shown;

[0036] Figure 3 This is a partially enlarged view of the magnet assembly installed in the cryogenic holder according to another embodiment of the present invention.

[0037] Wherein: 100, cryogenic holder; 110, outer container; 111, first outer cylinder; 112, first inner cylinder; 113, first sealing plate; 120, inner container; 121, first recessed area; 1211, first transition section; 1212, first recessed section; 122, third recessed area; 123, second outer cylinder; 124, second inner cylinder; 125, second sealing plate; 130, heat shielding layer; 131, second recessed area; 1311, second transition section; 1312, second recessed section; 132, fourth recessed area; 133, third outer cylinder; 134, third inner cylinder; 135, third sealing plate; 140, support structure; 141, first support member; 142, second support member; 143, first fixing block; 144, second fixing block; 200, magnet assembly; 210, first magnet coil; 220, second magnet coil. Detailed Implementation

[0038] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening 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 possible implementation.

[0044] This invention provides a cryogenic holder, which includes an outer container 110, an inner container 120, and a heat shield layer 130, wherein: the outer container 110 surrounds to form a cavity; the inner container 120 is disposed within the cavity; and the heat shield layer 130 is disposed between the outer container 110 and the inner container 120. The surface of the inner container 120 or the surface of the heat shield layer 130 forms a stepped structure to create clearance space between the inner container 120 and the suspension support connecting the outer container 110, or to create clearance space between the heat shield layer 130 and the suspension support connecting the outer container 110, thereby reducing the overall size of the device.

[0045] See Figures 1 to 3 The present invention provides a cryogenic retainer 100. This cryogenic retainer 100 is applied to the superconducting magnet structure of a magnetic resonance system, which can ensure the superconducting state of the excitation coil in the superconducting magnet structure and ensure the performance of the magnetic resonance system.

[0046] Understandably, currently, the inner container and outer container, as well as the thermal shielding layer and outer container, are connected via suspension supports and fixing blocks. However, these suspension supports and fixing blocks occupy the interlayer gap between the shielding cylinder and the inner container, necessitating a corresponding increase in the size of the shielding cylinder and the vacuum outer container—that is, the outer diameter and length of the containers must also be enlarged. However, this increase in size leads to a larger overall shape of the superconducting magnet, requires more materials, and increases costs.

[0047] Therefore, the present invention provides a novel cryogenic retainer 100, which has a compact structure, making its overall size as small as possible, reducing the amount of material used, lowering costs, and simplifying installation. The specific structure of the cryogenic retainer 100 is described in detail below.

[0048] See Figures 1 to 3 In one embodiment, the cryogenic holder 100 includes an outer container 110, an inner container 120, a heat shield layer 130, and a support structure 140. The outer container 110 has a hollow magnet hole. The inner container 120 is disposed within the outer container 110 and forms an installation space with the outer container 110. The heat shield layer 130 is disposed in the installation space; the surface of the inner container 120 has a first recessed portion recessed towards the inner side of the inner container 120, and / or the surface of the heat shield layer 130 has a second recessed portion, the second recessed portion being recessed towards the inner container 120, and the first recessed portion and the second recessed portion being correspondingly disposed. The support structure 140 includes a first support member 141 and a second support member 142, one end of the first support member 141 being disposed in the first recessed portion and the other end being connected to the outer container 110, and one end of the second support member 142 being disposed in the second recessed portion and the other end being connected to the outer container 110.

[0049] The cryogenic holder 100 has a multi-layered container structure, including an outer container 110, an inner container 120, and a heat shield layer 130. The outer container 110 has a cavity and is surrounded by a through-hole extending in the axial direction. The inner container 120 is disposed within the cavity of the outer container 110, and the inner container 120 and the outer container 110 form a vacuum environment installation space. The heat shield layer 130 is disposed within the installation space between the inner container 120 and the outer container 110. This cryogenic holder 100 can accommodate a magnet assembly 200 and can isolate external heat from the vacuum environment between the inner container 120 and the outer container 110, preventing the magnet assembly 200 from overheating. Furthermore, the heat shield layer 130 also serves as a heat shield, preventing external heat from being transferred to the inner container 120, thereby preventing the magnet assembly 200 from overheating and thus preventing the magnet assembly 200 from entering a superconducting state.

[0050] To ensure reliable fixation between the inner container 120, the heat shield layer 130, and the outer container 110, the cryogenic holder 100 also includes a support structure 140. The support structure 140 secures the inner container 120 and the heat shield layer 130 within the cavity of the outer container 110, preventing any shifting of their positions. Specifically, the support structure 140 includes a first support member 141 and a second support member 142. One end of the first support member 141 is connected to the outer wall of the inner container 120, and the other end is connected to a fixing point on the outer container 110. The first support member 141 suspends the inner container 120 within the outer container 110, ensuring reliable fixation of the inner container 120. One end of the second support member 142 is connected to the outer wall of the heat shield layer 130, and the other end of the second support member 142 is connected to the fixing point of the outer container 110. The heat shield layer 130 is hung in the installation space between the inner container 120 and the outer container 110 through the second support member 142, so as to ensure that the heat shield layer 130 is fixed and reliable.

[0051] Typically, the installation space between the inner container 120 and the outer container 110 is relatively large to accommodate the first support member 141 and the second support member 142, thus increasing the overall size of the device. To address this, the present invention provides a first recess on the inner container 120 and / or a second recess on the heat shield layer 130. The first recess is recessed into the outer surface of the inner container 120 and is recessed towards the inner side of the inner container 120. The second recess is recessed into the outer surface of the heat shield layer 130 and is recessed towards the inner container 120. Here, "inner side" refers to the internal space of the inner container 120, the area away from the heat shield layer 130. The first recess can accommodate a portion of the first support member 141, and the second recess can accommodate a portion of the second support member 142. In this way, the radial dimensions of the first support member 141 and the second support member 142 are reduced, correspondingly reducing the size of the installation space, and thus reducing the overall size of the cryogenic holder 100, thereby reducing the overall size of the magnetic resonance system.

[0052] It should be noted that the outer diameter of conventional superconducting magnets (such as those with a field strength of 1.5T) is typically only about 2 meters. The design scheme of this invention is particularly suitable for high-field and ultra-high-field superconducting magnets with magnetic field strengths of 5T and above, whose outer diameter is at least 2.7 meters. To meet the current hospital scanning room design requirements, the need for reducing the size of high-field and ultra-high-field superconducting magnets is even more urgent. The stepped structure formed on the surface of the inner container 120 or the surface of the heat shield layer 130 in this embodiment of the invention facilitates the formation of clearance space for the suspension support, thereby helping to reduce the overall size of the magnetic resonance system.

[0053] Optionally, a first recess is provided on the inner container 120, in which case a portion of the first support member 141 is located in the first recess. That is, the inner container 120 has a region with a reduced diameter, while the heat shield layer 130 has a structure with a uniform diameter. In this case, the installation space between the inner container 120 and the heat shield layer 130 can also be reduced.

[0054] Optionally, a second recess is provided on the heat shield layer 130, in which case a portion of the second support member 142 is located in the second recess. That is, the heat shield layer 130 has a region with a reduced diameter, while the inner container 120 has a structure with the same diameter. In this case, the installation space between the inner container 120 and the heat shield layer 130 can also be reduced.

[0055] Optionally, a first recess is provided on the inner container 120, and a second recess is provided on the heat shield layer 130, with the first and second recesses at least partially overlapping in the axial direction. The first recess accommodates a portion of the first support member 141, and the second recess accommodates a portion of the second support member 142. This reduces the radial dimension of the first support member 141 extending into the inner container 120 and reduces the radial dimension of the second support member 142 exposed in the heat shield layer 130, thereby reducing the size of the installation space and achieving the goal of reducing the overall size of the cryogenic holder 100.

[0056] It is worth noting that this invention is described using the example of the inner container 120 having a first recess and the heat shield layer 130 having a second recess. Of course, in other embodiments of this invention, only the first recess may be provided on the inner container 120, or only the second recess may be provided on the heat shield layer 130. In this embodiment, the structure of the first recess and the second recess is substantially the same as the structure of the first recess and the second recess in the above embodiments, and will not be described in detail here.

[0057] The first recess on the inner container 120 corresponds to the second recess on the heat shield layer 130. That is, the first and second recesses at least partially overlap in the axial direction, thus preventing interference between the inner container 120 and the heat shield layer 130 when reducing the installation space between the inner container 120 and the outer container 110. Of course, in other embodiments of the invention, the first and second recesses may be completely offset.

[0058] See Figures 1 to 3In one embodiment, the outer container 110 includes a first inner cylinder 112, a first outer cylinder 111, and a first sealing plate 113. The first inner cylinder 112 is installed inside the first outer cylinder 111, and the first sealing plate 113 connects the ends of the first outer cylinder 111 and the inner cylinder, forming a cavity. Optionally, the outer container 110 is made of metal or composite material, and more specifically, it can be made of carbon steel or stainless steel. The first inner cylinder 112 and the first outer cylinder 111 are respectively arranged radially from the center outwards, and both the first inner cylinder 112 and the first outer cylinder 111 are hollow cylindrical structures. The first sealing plate 113 is annular and connects the two ends of the first inner cylinder 112 and the first outer cylinder 111 respectively, so that the first inner cylinder 112, the first outer cylinder 111, and the first sealing plate 113 form a sealed cavity, and the first inner cylinder 112 forms an axially extending through hole.

[0059] See Figures 1 to 3 In one embodiment, an inner container 120 is disposed within the cavity. The inner container 120 includes a second inner cylinder 124 and a second outer cylinder 123 disposed radially from the center inwards. Both the second inner cylinder 124 and the second outer cylinder 123 are hollow cylindrical structures. A second sealing plate 125 is disposed at each end of the second inner cylinder 124. The second sealing plate 125 is annular and is connected to the second inner cylinder 124 and the second outer cylinder 123 respectively to seal them. Optionally, the inner container 120 is made of metal or composite material, and further, it can be made of carbon steel or stainless steel.

[0060] See Figures 1 to 3 In one embodiment, a heat shielding layer 130 is provided between the outer container 110 and the inner container 120. The heat shielding layer 130 includes a third inner cylinder 134 and a third outer cylinder 133 respectively disposed radially from the center inward. Both the third inner cylinder 134 and the third outer cylinder 133 are hollow cylindrical structures. A third sealing plate 135 is provided at both ends of the third inner cylinder 134. The third sealing plate 135 is annular and is connected to the third inner cylinder 134 and the third outer cylinder 133 respectively to seal them. Specifically, the third inner cylinder 134 is located between the first inner cylinder 112 and the second inner cylinder 124, the third outer cylinder 133 is located between the first outer cylinder 111 and the second outer cylinder 123, and the third sealing plate 135 is located between the first sealing plate 113.

[0061] See Figures 1 to 3In one embodiment, the first recessed portion includes a first recessed area 121 and / or a third recessed area 122. The first recessed area 121 is disposed in the central region of the inner container 120, and the third recessed area 122 is disposed at the edge of the inner container 120. The first recessed portion includes at least one recessed region, namely the first recessed area 121 and / or the third recessed area 122. The first recessed area 121 is recessed into the inner side of the outer surface of the inner container 120, and the third recessed area 122 is recessed into the inner side of the outer surface of the inner container 120. The first recessed area 121 is recessed into the inner side of the inner container 120, and the third recessed area 122 is recessed into the inner side of the inner container 120. The first recessed area 121 can accommodate a portion of the first support member 141, and the third recessed area 122 can accommodate a portion of the first support member 141.

[0062] See Figure 1 and Figure 2 In one embodiment of the present invention, a first recessed area 121 is provided in the middle region of the outer surface of the inner container 120. In this case, the portion of the inner container 120 excluding the first recessed area 121 is a first portion, and this first portion is a normal-sized area, the size of which is the normal outer diameter of the inner container 120. The outer diameter of the first recessed area 121 is smaller than the outer diameter of the normal-sized area of ​​the inner container 120. One end of the first support member 141 connected to the inner container 120 is disposed in the first recessed area 121. The first recessed area 121 accommodates a portion of the first support member 141, thereby reducing the size of the installation space between the inner container 120 and the outer container 110.

[0063] See Figure 3 In another embodiment of the present invention, a third recessed area 122 is provided at the edge of the outer surface of the inner container 120. In this case, the portion of the inner container 120 excluding the third recessed area 122 is a third part, which is a normal-sized area with a size equal to the normal outer diameter of the inner container 120. The outer diameter of the third recessed area 122 is smaller than the outer diameter of the normal-sized area of ​​the inner container 120. One end of the first support member 141 connected to the inner container 120 is disposed in the third recessed area 122, thereby accommodating part of the first support member 141 to reduce the size of the installation space between the inner container 120 and the outer container 110.

[0064] Of course, in other embodiments of the present invention, a first recessed area 121 and a third recessed area 122 may be simultaneously provided on the outer surface of the inner container 120, and the area between the first recessed area 121 and the third recessed area 122 is the normal size area of ​​the inner container 120, through which a portion of the first support member 141 is accommodated. It is worth noting that the present invention is described using one embodiment with a first recessed area 121 and another embodiment with a third recessed area 122 as examples. The implementation method of providing the first recessed area 121 and the third recessed area 122 in the same embodiment and the principle of providing the first recessed area 121 and the third recessed area 122 in the two embodiments are essentially the same, and will not be described in detail here.

[0065] See Figures 1 to 3 In one embodiment, the second recessed portion includes a second recessed area 131 and / or a fourth recessed area 132. The second recessed area 131 is disposed corresponding to the first recessed area 121, and the fourth recessed area 132 is disposed corresponding to the second recessed area 131. The second recessed portion includes at least one recessed region, namely the second recessed area 131 and / or the fourth recessed area 132. The second recessed area 131 is disposed in the middle region of the outer surface of the heat shielding layer 130, and the fourth recessed area 132 is disposed at the edge of the outer surface of the heat shielding layer 130. The second recessed area 131 is recessed on the side of the outer surface of the heat shielding layer 130 facing the inner container 120, and the fourth recessed area 132 is recessed on the side of the outer surface of the heat shielding layer 130 facing the inner container 120. The second recessed area 131 can accommodate a portion of the second support member 142, and the fourth recessed area 132 can accommodate a portion of the second support member 142.

[0066] See Figure 1 and Figure 2 In one embodiment of the present invention, a second recessed area 131 is provided in the middle region of the outer surface of the heat shielding layer 130. In this case, the portion of the heat shielding layer 130 excluding the second recessed area 131 constitutes a second portion, which is a normal-sized area with a size equal to the normal outer diameter of the heat shielding layer 130. The outer diameter of the second recessed area 131 is smaller than the outer diameter of the normal-sized area of ​​the heat shielding layer 130. One end of the second support member 142 connected to the heat shielding layer 130 is disposed in the second recessed area 131. The second recessed area 131 accommodates a portion of the second support member 142, thereby reducing the size of the installation space between the inner container 120 and the outer container 110.

[0067] See Figure 3In another embodiment of the present invention, a fourth recessed area 132 is provided at the edge of the outer surface of the heat shielding layer 130. In this case, the portion of the heat shielding layer 130 excluding the fourth recessed area 132 is a fourth portion, which is a normal-sized area with a size equal to the normal outer diameter of the heat shielding layer 130. The outer diameter of the fourth recessed area 132 is smaller than the outer diameter of the normal-sized area of ​​the heat shielding layer 130. One end of the second support member 142 connected to the heat shielding layer 130 is disposed in the fourth recessed area 132. The fourth recessed area 132 accommodates part of the second support member 142, thereby reducing the size of the installation space between the inner container 120 and the outer container 110.

[0068] Of course, in other embodiments of the present invention, a second recessed area 131 and a fourth recessed area 132 may be simultaneously provided on the outer surface of the heat shielding layer 130, and the area between the second recessed area 131 and the fourth recessed area 132 is the normal size area of ​​the heat shielding layer 130, through which a portion of the second support member 142 is accommodated. It is worth noting that the present invention is described using one embodiment having a second recessed area 131 and another embodiment having a fourth recessed area 132 as examples. The implementation method of providing the second recessed area 131 and the fourth recessed area 132 in the same embodiment and the principle of providing the second recessed area 131 and the fourth recessed area 132 in the two embodiments are essentially the same, and will not be described in detail here.

[0069] See Figures 1 to 3 In one embodiment, the first recessed area 121 includes a first transition section 1211 and a first recessed section 1212. The first recessed section 1212 is recessed into the surface of the inner container 120, and the first transition section 1211 transitionally connects the two sides of the first recessed section 1212 with the surface of the inner container 120. Optionally, the structure of the third recessed area 122 is the same as the structure of the first recessed area 121.

[0070] The first transition section 1211 is used to transition between a first portion of the outer surface of the inner container 120 and the first recessed section 1212. That is, the first transition section 1211 can transition between the normal-sized area and the recessed area of ​​the outer surface of the inner container 120. As shown in the figure, the first transition section 1211 is arranged vertically, and the first recessed section 1212 is arranged horizontally. The vertical first transition section 1211 connects the normal-sized area and the first recessed section 1212 of the outer surface of the inner container 120.

[0071] A first transition section 1211 is provided at each end of the first recessed section 1212, connecting the first recessed section 1212 to the normal-sized area of ​​the outer surface of the inner container 120 at both ends. In this case, the two first transition sections 1211 and the first recessed section 1212 enclose a first receiving space, which is used to accommodate part of the first support member 141, thereby reducing the size between the inner container 120 and the outer container 110.

[0072] It is worth noting that the structure of the third recessed area 122 is essentially the same as that of the first recessed area 121. Since the third recessed area 122 is located at the edge of the inner container 120, there is only one first transition segment 1211 in the third recessed area 122, and the first recessed segment 1212 extends through the edge of the inner container 120. In this case, the first recessed segment 1212 and the first transition segment 1211 enclose a first receiving space. Of course, in other embodiments of the present invention, the third recessed area 122 may also be located at the edge of the inner container 120 and have a certain distance from the edge. In this case, the third recessed area 122 includes two first transition segments 1211.

[0073] See Figures 1 to 3 In one embodiment, the second recessed region 131 includes a second transition section 1311 and a second recessed section 1312. The second recessed section 1312 is recessed into the surface of the inner container 120, and the second transition section 1311 transitionally connects the two sides of the first recessed section 1312 with the surface of the heat shield layer 130. Optionally, the structure of the fourth recessed region 132 is the same as the structure of the second recessed region 131.

[0074] The second transition section 1311 is used to transition between the second portion of the outer surface of the heat shield layer 130 and the second recessed section 1312. That is, the second transition section 1311 can transition between the normal-sized area and the recessed area of ​​the outer surface of the heat shield layer 130. As shown in the figure, the second transition section 1311 is arranged vertically, and the second recessed section 1312 is arranged horizontally. The vertical second transition section 1311 connects the normal-sized area and the second recessed section 1312 of the outer surface of the heat shield layer 130.

[0075] A second transition section 1311 is provided at each end of the second recessed section 1312, connecting the second recessed section 1312 to the normal-sized area of ​​the outer surface of the heat shield layer 130 at both ends. In this case, the two second transition sections 1311 and the second recessed section 1312 enclose a second receiving space, which is used to accommodate part of the second support member 142, thereby reducing the size between the inner container 120 and the outer container 110.

[0076] It is worth noting that the structure of the fourth recessed region 132 is essentially the same as that of the second recessed region 131. Since the fourth recessed region 132 is located at the edge of the heat shielding layer 130, there is only one second transition segment 1311 in the fourth recessed region 132, and its second recessed segment 1312 penetrates the edge of the heat shielding layer 130. In this case, the second recessed segment 1312 and the second transition segment 1311 enclose a second receiving space. Of course, in other embodiments of the present invention, the fourth recessed region 132 may also be located at the edge of the heat shielding layer 130 and have a certain distance from the edge. In this case, the fourth recessed region 132 includes two second transition segments 1311.

[0077] See Figures 1 to 3 In one embodiment, the depth of the first recessed area 121 ranges from 20 mm to 100 mm. This allows the first recessed area 121 to accommodate a relatively long first support member 141. Correspondingly, the depth of the third recessed area 122 ranges from 20 mm to 100 mm.

[0078] See Figures 1 to 3 In one embodiment, the depth of the second recessed area 131 ranges from 20 mm to 100 mm. This allows the second recessed area 131 to accommodate a longer second support member 142. Correspondingly, the depth of the fourth recessed area 132 ranges from 20 mm to 100 mm.

[0079] See Figures 1 to 3 In one embodiment, the support structure 140 further includes a first fixing block 143, which is disposed on the first transition section 1211. One end of the first support member 141 is connected to the first recessed area 121, and the height of the first fixing block 143 is less than, equal to, or slightly greater than the recess depth of the first recessed area 121.

[0080] The first fixing block 143 is used to fix the first support member 141. The first fixing block 143 is disposed at both ends of the first support member 141 to connect the inner container 120 and the outer container 110. Specifically, one first fixing block 143 is disposed in the first recessed area 121, and the other first fixing block 143 is disposed on the inner wall of the outer container 110. One end of the first support member 141 is rotatably connected to the first fixing block 143 in the first recessed area 121, and the other end is rotatably mounted on the first fixing block 143 in the outer container 110.

[0081] The first fixing block 143, disposed after the first recessed area 121, forms a reinforcing structure, strengthening the local strength of the inner container 120 and further reducing the material thickness and size of the inner container 120. Optionally, the first fixing block 143 is disposed on the first transition section 1211. Of course, in other embodiments of the present invention, the first fixing block 143 may also be disposed on the first transition section 1211. Of course, in other embodiments of the present invention, the first fixing block 143 may also be other mounting bases or other structures capable of mounting the first support member 141.

[0082] See Figures 1 to 3 In one embodiment, the support structure 140 further includes a second fixing block 144, which is disposed on the second transition section 1311. One end of the second support member 142 is connected to the second recessed area 131, and the height of the second fixing block 144 is less than, equal to, or slightly greater than the depth of the second recessed area 131.

[0083] The second fixing block 144 is used to fix the second support member 142. The second fixing block 144 is disposed at both ends of the second support member 142 to connect the heat shield layer 130 to the outer container 110. Specifically, one of the second fixing blocks 144 is disposed in the second recessed area 131, and the other second fixing block 144 is disposed on the inner wall of the outer container 110. One end of the second support member 142 is rotatably connected to the second fixing block 144 in the second recessed area 131, and the other end is rotatably mounted on the second fixing block 144 in the outer container 110.

[0084] The second fixing block 144, disposed after the second recessed area 131, forms a reinforcing structure, strengthens the local strength of the heat shield layer 130, and further reduces the material thickness and size of the heat shield layer 130. Optionally, the second fixing block 144 is disposed on the second transition section 1311. Of course, in other embodiments of the present invention, the second fixing block 144 may also be disposed on the second transition section 1311. In other embodiments of the present invention, the second fixing block 144 may also be other mounting bases or other structures capable of mounting the first support member 141.

[0085] Optionally, the first fixing block 143 and the second fixing block 144 on the inner wall of the outer container 110 can be arranged coincidentally. That is, the same fixing block is used to connect the first support member 141 and the second support member 142. Of course, in other embodiments of the present invention, the first fixing block 143 and the second fixing block 144 on the inner wall of the outer container 110 can also be arranged separately.

[0086] See Figure 1 and Figure 2In one embodiment of the present invention, a first recess is disposed in the central region of the inner container 120, and the first recess includes a first recessed area 121. A second recess is disposed in the central region of the heat shielding layer 130, and the second recess includes a second recessed area 131. The second outer cylinder 123 of the inner container 120 has a first recessed area 121 disposed in the central part along its axial direction, and the outer diameter of the first recessed area 121 is smaller than the outer diameter of the second outer cylinder 123 of the inner container 120. Figure 2 As shown, the first fixing block 143 is located in the first transition section 1211, and the height of the first fixing block 143 will not exceed the second outer cylinder 123 of the inner container 120. Therefore, the interlayer gap between the inner container 120 and the shielding cylinder can be greatly reduced. For example, the gap between the inner container 120 and the heat shielding layer 130 is usually only 10 mm, and the interlayer gap can be reduced by 50 mm. Correspondingly, the second fixing block 144 of the heat shielding layer 130 is disposed in the second recessed area 131, which can further reduce the interlayer gap between the heat shielding layer 130 and the outer container 110 and the overall size of the cryogenic holder 100.

[0087] Compared with the conventional magnet design, the cryogenic holder 100 of the present invention can reduce the interlayer gap between each layer of the container by more than 100 mm and reduce the diameter of the cryogenic holder 100 by 200 mm. At this time, the height of the hospital bed is also reduced by more than 100 mm. For a 5T whole-body imaging superconducting magnet, the height of the hospital bed can be controlled below 1.2 m, usually 1.1 m.

[0088] See Figure 1 and Figure 3 In another embodiment of the present invention, the first recessed area 121 is disposed on the edge of the inner container 120, the second recessed area 131 is disposed on the edge of the heat shield layer 130, one end of the first support member 141 is connected to the periphery or end of the outer container 110, and one end of the second support member 142 is connected to the periphery or end of the outer container 110.

[0089] The third recessed area 122 of the inner container 120 is located at both ends of the second outer cylinder 123 of the inner container 120 along the axial direction. The first fixing block 143 is located at the first transition section 1211 of the edge. The height of the first fixing block 143 will not exceed the second outer cylinder 123 of the inner container 120. At this time, the interlayer distance between the inner container 120 and the heat shield layer 130 can also be greatly reduced. The fourth recessed area 132 of the heat shield layer 130 is located at both ends of the third outer cylinder 133 of the heat shield layer 130 along the axial direction. The second fixing block 144 is located at the second transition section 1311 of the edge. The height of the second fixing block 144 will not exceed the third outer cylinder 133 of the heat shield layer 130. At this time, the interlayer distance between the heat shield layer 130 and the outer container 110 can also be greatly reduced.

[0090] Optionally, the heat shield layer 130 and the recessed areas at both ends of the inner container 120, as well as the support structure 140, are symmetrically arranged. Optionally, the second fixing block 144 and the first fixing block 143 on the outer container 110 can be disposed on the inner wall of the outer container 110, or they can be disposed on the first sealing plate 113 of the outer container 110.

[0091] See Figures 1 to 3 By employing the aforementioned recessed design, the cryogenic holder 100 of the present invention can effectively reduce the distance between the inner container 120 and the outer container 110, thereby reducing the overall size of the cryogenic holder 100. This results in a smaller overall shape, center height, and installation dimensions. When the cryogenic holder 100 is applied to a 5T whole-body MRI system, it achieves the aforementioned smaller interlayer gap and smaller overall container dimensions, while controlling the bed height to not exceed 1.2m. This height is suitable for conventional MRI equipment beds and has no special requirements for the installation site. Furthermore, the stepped outer coil structure optimizes its 5 Gaussian dissipation field range to not exceed 3.8 × 4.3m, significantly saving installation space and offering certain product advantages.

[0092] See Figures 1 to 3 The present invention also provides a superconducting magnet structure, including a cryogenic holder 100 and a magnet assembly 200, wherein the magnet assembly 200 is disposed in the cryogenic holder 100. The cryogenic holder 100 includes an outer container 110, an inner container 120, a heat shield layer 130, and a support structure 140. The outer container 110 has a hollow magnet hole. The inner container 120 is disposed in the outer container 110 and forms an installation space with the outer container 110. The heat shield layer 130 is disposed in the installation space; the surface of the inner container 120 has a first recessed portion recessed towards the inner side of the inner container 120, and / or the surface of the heat shield layer 130 has a second recessed portion, the second recessed portion being recessed towards the inner container 120, and the first recessed portion and the second recessed portion being correspondingly disposed. The support structure 140 includes a first support member 141 and a second support member 142. One end of the first support member 141 is disposed in the first recess and the other end is connected to the outer container 110. One end of the second support member 142 is disposed in the second recess and the other end is connected to the outer container 110.

[0093] The superconducting magnet structure of this invention uses the cryogenic holder 100 described in the above embodiments, which will not be elaborated upon here. By using the cryogenic holder 100, the size of the superconducting magnet structure can be effectively reduced, resulting in a smaller overall shape, center height, and installation dimensions. When this superconducting magnet structure is applied to a 5T whole-body scanning MRI system, the aforementioned smaller interlayer gap and smaller overall container dimensions can be achieved, while controlling the bed height to not exceed 1.2m. This height is suitable for conventional MRI equipment beds and has no special requirements for the installation site. Furthermore, the stepped outer coil structure optimizes its 5 Gaussian dissipation field range to not exceed 3.8x4.3m, significantly saving installation space and providing certain product advantages.

[0094] See Figures 1 to 3 In one embodiment, the magnet assembly 200 includes a main coil and a shielding coil, with the shielding coil disposed outside the main coil. The design structure of the shielding coil is adapted to the stepped / staircase structure of the inner container 120 surface. The shielding coil includes a first magnet coil 210 and a second magnet coil 220, with the outer diameter of the first magnet coil 210 being larger than the outer diameter of the second magnet coil 220. The first magnet coil 210 is disposed within the inner container 120, and the second magnet coil 220 is disposed corresponding to the first recess.

[0095] In one embodiment, the first magnet coil 210 of the shielding coil forms a high coil region, and the second magnet coil 220 of the shielding coil forms a low coil region. The radial dimension of the low coil region is 20% to 60% of the radial dimension of the high coil region to obtain a better shielding effect. The high coil region is located at the end of the inner container 120, and the low coil region is adjacent to the end of the inner container 120 and located in the middle region.

[0096] In one embodiment, along the container axis, the width of the coil region of the shielding coil is typically smaller than the width of the inner container 120, and the axial width of the lower coil region is not less than 50% of the axial width of the higher coil region. In 5T high-field superconductivity, the axial length of the shielding coil typically exceeds 500mm, wherein the height of the higher coil region typically exceeds 50mm, and the height of the lower coil region typically is less than 25mm, thus forming a recessed region with a depth of more than 25mm. This arrangement can fully utilize the irregular space formed by the aforementioned container concavity. Furthermore, for coil electromagnetic design, the combination of the high and low coil regions provides more freedom in optimizing the electromagnetic dissipation field, making it easier to achieve better uniformity within the FOV region. Additionally, by changing the size of the stepped coil or the width of the lower coil region, the range of the 5 Gaussian dissipation field can be significantly reduced.

[0097] The magnet assembly 200 is a component that generates magnets in a superconducting magnet structure. Because a first recess is provided on the outer surface of the inner container 120, this first recess restricts the size of the magnet assembly 200. Therefore, the present invention provides a stepped structure for the magnet assembly 200 to accommodate the first recess of the inner container 120 and the normal size range of the inner container 120.

[0098] Specifically, the magnet assembly 200 includes a first magnet coil 210 and a second magnet coil 220, which are arranged axially, and the outer diameter of the first magnet coil 210 is larger than that of the second magnet coil 220. The first magnet coil 210 and the second magnet coil 220 are disposed after the inner container 120, with the first magnet coil 210 corresponding to the normal size area of ​​the inner container 120 and the second magnet coil 220 corresponding to the first recessed portion of the inner container 120.

[0099] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the first recess is located in the central region of the inner container 120. At this time, the first magnet coil 210 is located on the left side, corresponding to the normal-sized area of ​​the edge of the inner container 120, and the second magnet coil 220 is located on the right side of the first magnet coil 210, corresponding to the first recessed area 121. That is, the first magnet coil 210 is located near the normal-sized area of ​​the inner container 120, and the second magnet coil 220 is located near the first recessed area 121 of the inner container 120.

[0100] In the axial direction of the inner container 120, the sum of the axial widths of the first magnet coil 210 and the second magnet coil 220 is less than the axial width of the inner container 120, while the axial width of the second magnet coil 220 is greater than the axial width of the first magnet coil 210. This arrangement makes full use of the irregular space formed by the concavity of the inner container 120. Furthermore, for coil electromagnetic design, the combination of high and low coils of the first magnet coil 210 and the second magnet coil 220 provides more freedom in optimizing the electromagnetic dissipation field. By changing the dimensions of the stepped first magnet coil 210 and the second magnet coil 220, or the width of the second magnet coil 220, the range of the 5 Gaussian dissipation field can be significantly reduced. In particular, for a 5T high-field magnet used for whole-body imaging, the range of the 5 Gaussian dissipation field can be reduced to below 3.8 x 4.3 m.

[0101] like Figure 3As shown, in another embodiment of the present invention, the second recess is located at the edge of the inner container 120. In this case, the first magnet coil 210 is located on the right side, corresponding to the normal-sized area of ​​the central region of the inner container 120, and the second magnet coil 220 is located on the left side of the first magnet coil 210, corresponding to the second recessed area 131. That is, the first magnet coil 210 is located near the normal-sized area of ​​the inner container 120, and the second magnet coil 220 is located near the first recessed area 121 of the inner container 120.

[0102] The present invention also provides a magnetic resonance system, including a superconducting magnet structure and a cryostat. The cryostat is disposed in the superconducting magnet structure and is used to cool the excitation coil of the superconducting magnet structure. The superconducting magnet structure includes a cryogenic holder 100 and a magnet assembly 200, the magnet assembly 200 being disposed in the cryogenic holder 100. The cryogenic holder 100 includes an outer container 110, an inner container 120, a heat shield layer 130, and a support structure 140. The outer container 110 has a hollow magnet hole. The inner container 120 is disposed in the outer container 110 and forms an installation space with the outer container 110. The heat shield layer 130 is disposed in the installation space; the surface of the inner container 120 has a first recessed portion recessed towards the inner side of the inner container 120, and / or the surface of the heat shield layer 130 has a second recessed portion, the second recessed portion being recessed towards the inner container 120, and the first recessed portion and the second recessed portion being correspondingly disposed. The support structure 140 includes a first support member 141 and a second support member 142. One end of the first support member 141 is disposed in the first recess and the other end is connected to the outer container 110. One end of the second support member 142 is disposed in the second recess and the other end is connected to the outer container 110.

[0103] After adopting the superconducting magnet structure of the above embodiment, the magnetic resonance system of the present invention can effectively reduce the external size of the magnetic resonance system, so that the magnetic resonance system has a smaller external size, center height and installation size.

[0104] 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.

[0105] The embodiments described above are merely illustrative of several implementations of the present invention, 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 the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A cryogenic holder (100), characterized in that, include: An outer container (110) having a magnetic hole in a hollow cylinder; The inner container (120) is disposed within the outer container (110) and together with the outer container (110) forms an installation space; and A heat shielding layer (130) is disposed in the installation space; The support structure (140) includes a first support member (141) and a second support member (142). The surface of the inner container (120) forms a stepped structure to create clearance space between the inner container (120) and the outer container (110) for the connection suspension support structure (140); the surface of the inner container (120) has a first recessed portion that is recessed radially inward towards the inner container (120), the first recessed portion extending along the axial direction of the magnet hole, one end of the first support member (141) being disposed in the first recessed portion, and the other end being connected to the outer container (110); and / or, the surface of the heat shield layer (130) The surface forms a stepped structure to create a clearance space between the heat shield layer (130) and the outer container (110) and the suspension support structure (140). The surface of the heat shield layer (130) has a second recessed portion, which is recessed toward the inner container (120). The second recessed portion extends along the axial direction of the magnet hole. One end of the second support member (142) is disposed in the second recessed portion, and the other end is connected to the outer container (110). The first recessed portion and the second recessed portion are correspondingly disposed.

2. The cryogenic holder (100) according to claim 1, characterized in that, The first recess includes a first recessed area (121) and / or a third recessed area (122), the first recessed area (121) being disposed in the middle region of the inner container (120), and the third recessed area (122) being disposed at the edge of the inner container (120); The second recess includes a second recessed area (131) and / or a fourth recessed area (132), the second recessed area (131) being provided corresponding to the first recessed area (121), and the fourth recessed area (132) being provided corresponding to the second recessed area (131).

3. The cryogenic holder (100) according to claim 2, characterized in that, The first recessed area (121) includes a first transition section (1211) and a first recessed section (1212). The first recessed section (1212) is recessed in the surface of the inner container (120). The first transition section (1211) transitionally connects the two sides of the first recessed section (1212) with the surface of the inner container (120).

4. The cryogenic holder (100) according to claim 3, characterized in that, The second recessed area (131) includes a second transition section (1311) and a second recessed section (1312). The second recessed section (1312) is recessed in the surface of the inner container (120). The second transition section (1311) transitionally connects the two sides of the first recessed section (1212) with the surface of the heat shield layer (130).

5. The cryogenic holder (100) according to claim 4, characterized in that, The support structure (140) further includes a first fixing block (143), which is disposed in the first recessed area (121), and one end of the first support member (141) is connected to the first fixing block (143). The support structure (140) further includes a second fixing block (144), which is disposed in the second transition section (1311), and one end of the second support member (142) is connected to the second recessed area (131).

6. The cryogenic holder (100) according to claim 4, characterized in that, The first recessed area (121) is located at the edge of the inner container (120), the second recessed area (131) is located at the edge of the heat shield layer (130), one end of the first support member (141) is connected to the periphery or end of the outer container (110), and one end of the second support member (142) is connected to the periphery or end of the outer container (110).

7. A superconducting magnet structure, characterized in that, Includes a cryogenic holder (100) and a magnet assembly (200), the magnet assembly (200) being disposed within the cryogenic holder (100), the cryogenic holder (100) comprising: An outer container (110) having a magnetic hole in a hollow cylinder; The inner container (120) is disposed in the outer container (110) and together with the outer container (110) forms an installation space; A heat shielding layer (130) is disposed in the installation space; The support structure (140) includes a first support member (141) and a second support member (142). The surface of the inner container (120) forms a stepped structure to create clearance space between the inner container (120) and the outer container (110) for the connection suspension support structure (140); the surface of the inner container (120) has a first recessed portion that is recessed radially inward towards the inner container (120), the first recessed portion extending along the axial direction of the magnet hole, one end of the first support member (141) being disposed in the first recessed portion, and the other end being connected to the outer container (110); and / or, the surface of the heat shield layer (130) is formed with... The structure is stepped to form a clearance space between the heat shield layer (130) and the outer container (110) and the suspension support structure (140); the surface of the heat shield layer (130) has a second recess, and / or the second recess is recessed toward the inner container (120), the second recess extends along the axial direction of the magnet hole, one end of the second support member (142) is disposed in the second recess, and the other end is connected to the outer container (110); and the first recess and the second recess are correspondingly disposed.

8. The superconducting magnet structure according to claim 7, characterized in that, The magnet assembly (200) includes a first magnet coil (210) and a second magnet coil (220). The outer diameter of the first magnet coil (210) is larger than the outer diameter of the second magnet coil (220). The first magnet coil (210) is disposed in the inner container (120), and the second magnet coil (220) is disposed corresponding to the first recess.

9. A magnetic resonance system, characterized in that, The system includes a superconducting magnet structure and a cryostat, wherein the cryostat is disposed within the superconducting magnet structure and is used to cool the excitation coil of the superconducting magnet structure; the superconducting magnet structure includes a cryogenic holder (100) and a magnet assembly (200), wherein the magnet assembly (200) is disposed within the cryogenic holder (100), and the cryogenic holder (100) includes: An outer container (110) having a magnetic hole in a hollow cylinder; The inner container (120) is disposed in the outer container (110) and together with the outer container (110) forms an installation space; A heat shield layer (130) is disposed in the installation space; the surface of the inner container (120) forms a stepped structure to form a clearance space between the inner container (120) and the outer container (110) connected to the suspension support structure (140); the surface of the inner container (120) has a first recessed portion recessed radially inward towards the inner container (120), the first recessed portion extending along the axial direction of the magnet hole, and / or, the surface of the heat shield layer (130) forms a stepped structure to form a clearance space between the heat shield layer (130) and the outer container (110) connected to the suspension support structure (140); the surface of the heat shield layer (130) has a second recessed portion, and / or, the second recessed portion is recessed toward the inner container (120), the second recessed portion extending along the axial direction of the magnet hole, and the first recessed portion and the second recessed portion are correspondingly disposed; and The support structure (140) includes a first support member (141) and a second support member (142). One end of the first support member (141) is disposed in the first recess and the other end is connected to the outer container (110). One end of the second support member (142) is disposed in the second recess and the other end is connected to the outer container (110).

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