CN116741492A - Cryostat, superconducting magnet structure and magnetic resonance system - Google Patents

Abstract

The invention relates to a cryostat, a superconducting magnet structure and a magnetic resonance system. The cryostat includes: an outer container; an inner container arranged in the outer container and enclosing an installation space with the outer container; and a heat shielding layer disposed in the installation space; the surface of the inner container is provided with a first concave part which is concave towards the inner side of the inner container, and/or the surface of the heat shielding layer is provided with a second concave part. Therefore, the distance between the inner container and the outer container can be reduced, the overall size of the cryostat is further reduced, the cost is reduced, and the installation difficulty is reduced.

Description

Cryostat, superconducting magnet structure and magnetic resonance system

Technical Field

The invention relates to the technical field of magnetic resonance equipment, in particular to a low-temperature retainer, a superconducting magnet structure and a magnetic resonance system.

Background

The superconducting magnet for the magnetic resonance system is usually formed by filling liquid helium into a tank body of a low-temperature retainer to immerse a superconducting coil, so that the superconducting coil maintains a low-temperature superconducting state, and a stable strong magnetic field is generated after the coil is excited. A rectangular-section solenoidal coil group in a typical superconducting magnet structure is the most common coil structure at present, and consists of a plurality of inner coils and outer magnet coils, all of which are wound in a wire slot of a bobbin of metallic material and finally encapsulated in a hollow cylindrical cryostat.

The cryostat is typically assembled from three layers of concentric cylindrical cavities, including an innermost liquid helium vessel, an intermediate shield cylinder, and an outer vacuum vessel. In order to maintain the relative position and fix, the inner container, the shielding cylinder and the outer container are also provided with a plurality of hanging fixing pieces respectively, which can firmly hang and fix the inner container and the shielding cylinder on the outer container.

Because the coil weight of the superconducting magnet is heavier, the common 1.5T superconducting magnet coil weighs up to 2 tons, while the weight of the high-field superconducting magnet coil exceeds ten tons and even up to tens of tons, the impact force generated by the working conditions such as gravity and transportation can generate larger reaction force on the support and the fixed block thereof. The suspension blocks therefore need to have a certain shape and size, in particular a thickness of typically more than 30mm, which also requires a larger gap between the shielding cylinder and the inner container to accommodate the symmetrically distributed suspension blocks, typically a gap of 40-80 mm.

Generally, for a specific superconducting magnet, the coil design is determined by the magnet parameters (such as the size and uniformity of the central magnetic field uniform region, etc.), after the magnet parameters are determined, the sizes of the inner and outer coils are determined, such as 1.5T and 3.0T superconducting magnet coils for whole body imaging, the outer diameter of the coils is usually about 1.6-2 m, and the diameters of the magnet coils are significantly larger than those of the inner coils and are mainly distributed at two end parts of the inner container and close to the outer cylinder thereof. In addition, the effect of the magnet coil in electromagnetic design is mainly to reduce the range of the magnet stray field (usually referred to as a magnetic field with Gaussian intensity) so as to reduce the size limitation of the superconducting magnet on the installation site, and the installation site size of the 1.5T whole-body imaging magnetic resonance device is 2.5x4m (taking the magnet as a center, an X-Y plane and a single axis) which is required by taking the Gaussian stray field as a reference, and the installation site size of the 5T whole-body imaging magnetic resonance device is 5X6m. For coil design of superconducting magnet, especially high-field superconducting magnet, the width of the outer magnet coil along the central axis direction of the container is as wide as possible, which is favorable for reducing stray field to a certain extent.

On the other hand, for a coil of determined dimensions, the dimensions of the inner container with which it cooperates are also substantially determined; because the hanging fixing block occupies the interlayer gap between the shielding cylinder and the inner container, the shielding cylinder and the vacuum outer container need to be correspondingly enlarged, namely the outer diameter, the length and the like of the container need to be correspondingly enlarged. However, with these increases in size, the superconducting magnet is largely deformed as a whole, more materials are used, the cost increases, and the difficulty in installation such as a ground sinking table or a raising table is increased, which is inconvenient for installation and use.

Disclosure of Invention

In view of this, it is necessary to provide a cryostat, a superconducting magnet structure, and a magnetic resonance system capable of reducing the overall size of the superconducting magnet, in order to solve the problem that the overall size of the superconducting magnet increases after the inner container and the outer container are connected by a suspension support.

A cryostat, comprising:

an outer container having a hollow magnet bore;

an inner container arranged in the outer container and enclosing an installation space with the outer container; and

the heat shielding layer is arranged in the installation space;

the surface of the inner container is provided with a first concave part which is concave towards the inner side of the inner container, and/or the surface of the heat shielding layer is provided with a second concave part which is concave towards the direction of the inner container, and the first concave part and the second concave part are correspondingly arranged.

In one embodiment, the first recess includes a first recess region and/or a third recess region, the first recess region is disposed in a middle region of the inner container, and the third recess region is disposed at an edge of the inner container;

the second concave part comprises a second concave region and/or a fourth concave region, the second concave region is arranged corresponding to the first concave region, and the fourth concave region is arranged corresponding to the second concave region.

In one embodiment, the first concave area includes a first transition section and a first concave section, the first concave section is concave in the surface of the inner container, and the first transition section is in transition connection with two sides of the first concave section and the surface of the inner container.

In one embodiment, the second concave region includes a second transition section and a second concave section, the second concave section is concave in the surface of the inner container, and the second transition section is in transition connection with the two sides of the first concave section and the surface of the heat shielding layer.

In one embodiment, the cryostat further comprises:

the support structure comprises a first support piece and a second support piece, wherein one end of the first support piece is arranged in the first concave part, the other end of the first support piece is connected with the outer container, one end of the second support piece is arranged in the second concave part, and the other end of the second support piece is connected with the outer container.

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

the support structure further comprises a second fixing block, the second fixing block is arranged on the second transition section, and one end of the second support piece is connected with the second concave area.

In one embodiment, the first concave area is disposed at an edge of the inner container, the second concave area is disposed at an edge of the heat shielding layer, one end of the first support is connected to a peripheral side or end of the outer container, and one end of the second support is connected to the peripheral side or end of the outer container.

A superconducting magnet structure comprising a cryostat and a magnet assembly disposed therein, the cryostat comprising:

an outer container having a hollow magnet bore;

an inner container arranged in the outer container and enclosing an installation space with the outer container;

the heat shielding layer is arranged in the installation space; the surface of the inner container is provided with a first concave part which is concave towards the inner side of the inner container, the surface of the heat shielding layer is provided with a second concave part, and/or the second concave part is concave towards the direction of the inner container, and the first concave part and the second concave part are correspondingly arranged.

In one embodiment, the magnet assembly includes a first magnet coil having an outer diameter greater than an outer diameter of the second magnet coil, the first magnet coil disposed in the inner container, and the second magnet coil disposed in correspondence to the first recess.

A magnetic resonance system comprising a superconducting magnet structure and a refrigerator disposed on the superconducting magnet structure for cooling an excitation coil of the superconducting magnet structure; the superconducting magnet structure includes a cryostat and a magnet assembly disposed therein, the cryostat including:

an outer container having a hollow magnet bore;

an inner container arranged in the outer container and enclosing an installation space with the outer container;

the heat shielding layer is arranged in the installation space; the surface of the inner container is provided with a first concave part which is concave towards the inner side of the inner container, the surface of the heat shielding layer is provided with a second concave part, and/or the second concave part is concave towards the direction of the inner container, and the first concave part and the second concave part are arranged correspondingly; and

The support structure comprises a first support piece and a second support piece, wherein one end of the first support piece is arranged in the first concave part, the other end of the first support piece is connected with the outer container, one end of the second support piece is arranged in the second concave part, and the other end of the second support piece is connected with the outer container.

After the technical scheme is adopted, the invention has at least the following technical effects:

according to the cryostat, the superconducting magnet structure and the magnetic resonance system, the surface of the inner container is provided with the first concave part which is concave, the surface of the heat shielding layer is provided with the second concave part, the positions of the first concave part and the second concave part correspond to each other, the first supporting piece of the supporting structure is connected with the inner container and the outer container in the first concave part, and the second supporting piece is connected with the heat shielding layer and the outer container in the second concave part. The first concave part can hold partial first support piece, and the second concave part can hold partial second support piece, can reduce the interval between inner container and the outer container when guaranteeing that first support piece and second support piece reliably support like this, and then reduce the overall dimension of cryostat, reduce the material of using, reduce cost reduces the installation degree of difficulty.

Drawings

FIG. 1 is a schematic view of a cryostat in which a magnet assembly is mounted according to an embodiment of the invention;

FIG. 2 is an enlarged view of a portion of the cryostat shown in FIG. 1 with a magnet assembly mounted therein;

FIG. 3 is an enlarged view of a portion of a cryostat in which a magnet assembly is mounted, according to another embodiment of the invention.

Wherein: 100. a cryostat; 110. an outer container; 111. a first outer cylinder; 112. a first inner cylinder; 113. a first sealing plate; 120. an inner container; 121. a first recessed region; 1211. a first transition section; 1212. a first recessed section; 122. a third recessed region; 123. a second outer cylinder; 124. a second inner cylinder; 125. a second sealing plate; 130. a thermal shielding layer; 131. a second recessed region; 1311. a second transition section; 1312. a second recessed section; 132. a fourth recessed region; 133. a third outer cylinder; 134. a third inner cylinder; 135. a third sealing plate; 140. A support structure; 141. a first support; 142. a second support; 143. a first fixed block; 144. a second fixed block; 200. a magnet assembly; 210. a first magnet coil; 220. and a second magnet coil.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present 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", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The present invention provides a cryostat comprising an outer vessel 110, an inner vessel 120 and a thermal barrier 130, wherein: the outer container 110 surrounds the cavity; the inner container 120 is disposed within the cavity; the thermal barrier 130 is disposed between the outer vessel 110 and the inner vessel 120. The surface of the inner container 120 or the surface of the heat shielding layer 130 forms a step structure so as to form an avoidance space for connecting the inner container 120 and the outer container 110 with a suspension support, or form an avoidance space for connecting the heat shielding layer 130 and the outer container 110 with a suspension support, thereby being beneficial to reducing the size of the whole machine.

Referring to fig. 1-3, the present invention provides a cryostat 100. The cryostat 100 is applied to a superconducting magnet structure of a magnetic resonance system, and can ensure the superconducting state of an exciting coil in the superconducting magnet structure and ensure the usability of the magnetic resonance system.

It can be appreciated that at present, the inner container and the outer container of the cryostat and the heat shielding layer and the outer container are connected through the matching of the hanging support piece and the hanging fixing piece, but the hanging support piece and the hanging fixing piece occupy the interlayer gap between the shielding cylinder and the inner container, so that the shielding cylinder and the vacuum outer container need to be correspondingly enlarged, namely the outer diameter, the length and the like of the container need to be correspondingly enlarged. However, with these increases in size, the superconducting magnet as a whole deforms greatly, and more materials are used, which increases the cost, and the like.

Therefore, the present invention provides a novel cryostat 100, which has a compact structure, so that the whole size of the cryostat 100 is as small as possible, the materials used are reduced, the cost is lowered, and the installation difficulty is reduced. The specific structure of the cryostat 100 is described in detail below.

Referring to fig. 1-3, in one embodiment, the cryostat 100 includes an outer vessel 110, an inner vessel 120, a thermal shield 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 encloses a mounting space with the outer container 110. A heat shielding layer 130 is disposed in the installation space; the surface of the inner container 120 has a first recess portion recessed toward the inner side of the inner container 120, and/or the surface of the heat shielding layer 130 has a second recess portion recessed toward the inner container 120, and the first recess portion and the second recess portion are disposed correspondingly. The supporting structure 140 includes a first supporting member 141 and a second supporting member 142, one end of the first supporting member 141 is disposed in the first recess portion, the other end is connected to the outer container 110, one end of the second supporting member 142 is disposed in the second recess portion, and the other end is connected to the outer container 110.

The cryostat 100 is a multi-layered container structure including an outer container 110, an inner container 120, and a thermal barrier 130. The outer container 110 has a cavity and surrounds a through hole that is surrounded to extend in the axial direction. The inner container 120 is disposed in the cavity of the outer container 110, the inner container 120 and the outer container 110 enclose an installation space of a vacuum environment, and the heat shielding layer 130 is disposed in the installation space between the inner container 120 and the outer container 110. The cryostat 100 can accommodate the magnet assembly 200, isolate the external heat from the vacuum environment between the inner container 120 and the outer container 110, avoid the magnet assembly 200 from rising too fast, and the heat shielding layer 130 can also play a role of heat shielding, avoid the external heat from being transferred into the inner container 120, and further avoid the magnet assembly 200 from rising temperature, so as to avoid the superconducting state of the magnet assembly 200.

In order to ensure reliable fixation between the inner vessel 120, the thermal shielding layer 130 and the outer vessel 110, the cryostat 100 further comprises a support structure 140, wherein the inner vessel 120 and the thermal shielding layer 130 are fixed in the accommodating cavity of the outer vessel 110 by the support structure 140, so as to avoid the positions of the inner vessel 120 and the thermal shielding layer 130 from shifting. Specifically, the supporting structure 140 includes a first supporting member 141 and a second supporting member 142, one end of the first supporting member 141 is connected to the outer wall of the inner container 120, the other end of the first supporting member 141 is connected to a fixing point of the outer container 110, and the inner container 120 is suspended in the outer container 110 by the first supporting member 141, so as to ensure that the inner container 120 is reliably fixed. One end of the second support 142 is connected with the outer wall of the heat shielding layer 130, the other end of the second support 142 is connected with a fixing point of the outer container 110, and the heat shielding layer 130 is hung in an installation space between the inner container 120 and the outer container 110 through the second support 142, so that the fixing reliability of the heat shielding layer 130 is ensured.

Generally, the size of the installation space between the inner container 120 and the outer container 110 is large to accommodate the first and second supporting members 141 and 142, thereby resulting in an increase in the overall size. For this, the present invention provides a first recess on the inner container 120 and/or a second recess on the heat shielding layer 130. The first concave portion is concave on the outer surface of the inner container 120 and is concave towards the inner side of the inner container 120, and the second concave portion is concave on the outer surface of the heat shielding layer 130 and is concave towards the inner container 120. The inner side here refers to the inner space of the inner container 120, and a region away from the heat shielding layer 130. The first recess can receive a portion of the first support 141 and the second recess can receive a portion of the second support 142. In this way, the dimensions of the first support member 141 and the second support member 142 in the radial direction are reduced, and accordingly, the size of the installation space can be reduced, thereby reducing the size of the entire cryostat 100 to reduce the overall size of the magnetic resonance system.

It should be noted that the outer diameter of a conventional superconducting magnet (such as 1.5T field strength) is usually only about 2m, and the design scheme of the invention is particularly suitable for a high-field and ultra-high-field superconducting magnet with the magnetic field strength of 5T and above, and the outer diameter of the external dimension of the superconducting magnet is at least 2.7m, so that the requirements of the high-field and ultra-high-field superconducting magnet on the reduction of the external dimension are more urgent in order to meet the requirement of the scanning room design of the existing hospital. The step structure formed on the surface of the inner container 120 or the surface of the heat shielding layer 130 in the embodiment of the invention is beneficial to forming the avoidance space of the suspension support piece, thereby being beneficial to reducing the whole machine size of the magnetic resonance system.

Optionally, a first recess is provided on the inner container 120, in which case a portion of the first support 141 is located. That is, the inner container 120 has a region of reduced diameter, and the heat shielding layer 130 has a uniform diameter. At this time, the installation space between the inner container 120 and the heat shielding layer 130 can also be reduced.

Optionally, a second recess is provided on the heat shielding layer 130, in which case a portion of the second support 142 is located. That is, the heat shielding layer 130 has a region with a reduced diameter, and the inner container 120 has a uniform diameter. At this time, the installation space between the inner container 120 and the heat shielding layer 130 can also be reduced.

Optionally, a first recess is provided on the inner container 120, a second recess is provided on the heat shielding layer 130, and the first recess and the second recess at least partially overlap in the axial direction. The first concave portion accommodates the partial first supporting member 141 and the second concave portion accommodates the partial second supporting member 142, so that the radial dimension of the first supporting member 141 extending into the inner container 120 can be reduced, the radial dimension of the second supporting member 142 exposing the heat shielding layer 130 can be reduced, and the size of the installation space can be further reduced, thereby achieving the purpose of reducing the overall size of the cryostat 100.

It should be noted that, in the present invention, the inner container 120 has a first concave portion, and the heat shielding layer 130 has a second concave portion. Of course, in other embodiments of the present invention, only the first concave portion may be disposed on the inner container 120, or only the second concave portion may be disposed on the heat shielding layer 130, and in this embodiment, the structures of the first concave portion and the second concave portion are substantially the same as those of the first concave portion and the second concave portion in the above embodiment, which is not described in detail herein.

The position of the first recess corresponds to the position of the second recess on the thermal shield 130 in the inner container 120. That is, the first concave portion and the second concave portion at least partially overlap in the axial direction, so that interference between the inner container 120 and the heat shielding layer 130 can be avoided while reducing the installation space between the inner container 120 and the outer container 110. Of course, in other embodiments of the present invention, the first recess portion and the second recess portion may be completely staggered.

Referring to fig. 1 to 3, in an 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 in the first outer cylinder 111, and the first sealing plate 113 connects the first outer cylinder 111 and an end of the inner cylinder and encloses a cavity. Alternatively, the outer vessel 110 is made of metal or a composite material, and further, may be made of carbon steel or stainless steel. The first inner cylinder 112 and the first outer cylinder 111 are respectively disposed from the center to the outside in the radial direction, and the first inner cylinder 112 and the first outer cylinder 111 are both hollow cylindrical structures. The first sealing plate 113 is annular, and is connected to both ends of the first inner cylinder 112 and the first outer cylinder 111, so that a sealed cavity is enclosed among the first inner cylinder 112, the first outer cylinder 111 and the first sealing plate 113, and the first inner cylinder 112 is enclosed as an axially extending through hole.

Referring to fig. 1 to 3, in an embodiment, an inner container 120 is disposed in the cavity, the inner container 120 includes a second inner cylinder 124 and a second outer cylinder 123 disposed from the center to the inside in a radial direction thereof, the second inner cylinder 124 and the second outer cylinder 123 are hollow cylindrical structures, second sealing plates 125 are disposed at both ends of the second inner cylinder 124, respectively, the second sealing plates 125 are annular structures, and the second sealing plates 125 are connected to the second inner cylinder 124 and the second outer cylinder 123, respectively, so as to seal them. Alternatively, the inner vessel 120 is made of metal or a composite material, and further, carbon steel or stainless steel may be used.

Referring to fig. 1 to 3, in an embodiment, a thermal shielding layer 130 is disposed between an outer container 110 and an inner container 120, the thermal shielding layer 130 includes a third inner cylinder 134 and a third outer cylinder 133 disposed from the center to the inside in a radial direction thereof, the third inner cylinder 134 and the third outer cylinder 133 are each of a hollow cylindrical structure, third sealing plates 135 are disposed at both ends of the third inner cylinder 134, respectively, and the third sealing plates 135 are of a ring structure, and the third sealing plates 135 are connected to the third inner cylinder 134 and the third outer cylinder 133, respectively, to seal them. Specifically, the third inner tube 134 is located between the first inner tube 112 and the second inner tube 124, the third outer tube 133 is located between the first outer tube 111 and the second outer tube 123, and the third sealing plate 135 is located between the first sealing plate 113 and the first sealing plate 113.

Referring to fig. 1 to 3, in an embodiment, the first recess includes a first recess area 121 and/or a third recess area 122, the first recess area 121 is disposed in a middle area of the inner container 120, and the third recess area 122 is disposed at an edge of the inner container 120. The first concave portion includes at least one concave area, which is a first concave area 121 and/or a third concave area 122, where the first concave area 121 is disposed in a middle area of the outer surface of the inner container 120, and the third concave area 122 is disposed at an edge of the outer surface of the inner container 120. The first recess area 121 is recessed in the inner container 120 such that the outer surface thereof is recessed inward of the inner container 120, and the third recess area 122 is recessed in the inner container 120 such that the outer surface thereof is recessed inward of the inner container 120. The first recessed area 121 can receive a portion of the first support 141, and the third recessed area 122 can receive a portion of the first support 141.

Referring to fig. 1 and 2, in an embodiment of the present invention, a first concave area 121 is provided in a middle area of an outer surface of the inner container 120, and at this time, a portion of the inner container 120 except for the first concave area 121 is a first portion, and the first portion of the inner container 120 is a normal-sized area, which is a normal outer diameter size of the inner container 120. The outer diameter of the first recessed area 121 is smaller than the outer diameter of the normal size area of the inner container 120. One end of the first support 141 connected to the inner container 120 is disposed in the first recess region 121, and a portion of the first support 141 is received through the first recess region 121 to reduce the size of the installation space between the inner container 120 and the outer container 110.

Referring to fig. 3, in another embodiment of the present invention, a third recess 122 is formed at an edge of an outer surface of the inner container 120, and at this time, a portion of the inner container 120 except for the third recess 122 is a third portion, and the third portion of the inner container 120 is a normal-sized region having a normal outer diameter size 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 vessel 120. One end of the first support 141 connected to the inner container 120 is disposed in the third recess 122, and a portion of the first support 141 is received through the third recess 122 to reduce the size of the installation space between the inner container 120 and the outer container 110.

Of course, in other embodiments of the present invention, the first concave region 121 and the third concave region 122 may be disposed on the outer surface of the inner container 120 at the same time, and a normal size region of the inner container 120 is between the first concave region 121 and the third concave region 122, and a portion of the first supporting member 141 is accommodated by the first concave region 121 and the third concave region 122. It should be noted that, in the present invention, the embodiment having the first concave region 121 in one embodiment and the embodiment having the third concave region 122 in another embodiment are taken as examples, and the implementation of disposing the first concave region 121 and the third concave region 122 in the same embodiment and the principle of disposing the first concave region 121 and the third concave region 122 in the two embodiments are substantially the same, and are not repeated herein.

Referring to fig. 1 to 3, in an embodiment, the second recess includes a second recess region 131 and/or a fourth recess region 132, the second recess region 131 is disposed corresponding to the first recess region 121, and the fourth recess region 132 is disposed corresponding to the second recess region 131. The second concave portion includes at least one concave region, which is a second concave region 131 and/or a fourth concave region 132, where the second concave region 131 is disposed in a middle region of the outer surface of the heat shielding layer 130, and the fourth concave region 132 is disposed at an edge of the outer surface of the heat shielding layer 130. The second concave region 131 is concave on the side of the outer surface of the heat shielding layer 130 where the inner container 120 is located, and the fourth concave region 132 is concave on the side of the outer surface of the heat shielding layer 130 where the inner container 120 is located. The second recessed area 131 can receive a portion of the second support 142, and the fourth recessed area 132 can receive a portion of the second support 142.

Referring to fig. 1 and 2, in an embodiment of the present invention, a second concave region 131 is disposed in a middle region of an outer surface of the heat shielding layer 130, and at this time, a portion of the heat shielding layer 130 except for the second concave region 131 is a second portion, and the second portion of the heat shielding layer 130 is a normal-sized region having a normal outer diameter size of the heat shielding layer 130. The outer diameter of the second recessed region 131 is smaller than the outer diameter of the normal-sized region of the heat shielding layer 130. One end of the second support 142 connected to the heat shielding layer 130 is disposed in the second recess 131, and a portion of the second support 142 is received through the second recess 131 to reduce the size of the installation space between the inner container 120 and the outer container 110.

Referring to fig. 3, in another embodiment of the present invention, a fourth concave region 132 is disposed at an edge of an outer surface of the heat shielding layer 130, and at this time, a portion of the heat shielding layer 130 except for the fourth concave region 132 is a fourth portion, and the fourth portion of the heat shielding layer 130 is a normal-sized region having a normal outer diameter size of the heat shielding layer 130. The outer diameter of the fourth recessed region 132 is smaller than the outer diameter of the normal-sized region of the thermal shield layer 130. One end of the second support 142 connected to the heat shielding layer 130 is disposed in the fourth recess 132, and a portion of the second support 142 is received through the fourth recess 132 to reduce the size of the installation space between the inner container 120 and the outer container 110.

Of course, in other embodiments of the present invention, the second concave region 131 and the fourth concave region 132 may be disposed on the outer surface of the heat shielding layer 130 at the same time, and a normal-sized region of the heat shielding layer 130 is between the second concave region 131 and the fourth concave region 132, and a portion of the second support 142 is accommodated by the second concave region 131 and the fourth concave region 132. It should be noted that, in the present invention, the embodiment having the second concave region 131 in one embodiment and the embodiment having the fourth concave region 132 in another embodiment are taken as examples, and the implementation of disposing the second concave region 131 and the fourth concave region 132 in the same embodiment and the principle of disposing the second concave region 131 and the fourth concave region 132 in the two embodiments are substantially the same, which is not repeated herein.

Referring to fig. 1 to 3, in an embodiment, the first recess 121 includes a first transition section 1211 and a first recess section 1212, where the first recess section 1212 is disposed on the surface of the inner container 120, and the first transition section 1211 is in transition connection with two sides of the first recess section 1212 and the surface of the inner container 120. Alternatively, the third recess region 122 has the same structure as the first recess region 121.

The first transition section 1211 is used to transition the first portion of the outer surface of the inner container 120 with the first recessed section 1212. That is, the first transition 1211 can transition between the normal-sized region and the recessed region of the outer surface of the inner vessel 120. As shown, the first transition 1211 is disposed in a vertical direction and the first recessed section 1212 is disposed in a horizontal direction, the vertical first transition 1211 connecting the normal-sized region of the outer surface of the inner container 120 with the first recessed section 1212.

A first transition section 1211 is respectively disposed at two ends of the first concave section 1212, and the first concave section 1212 is connected to the normal-sized region of the outer surface of the inner container 120 at two ends through the first transition section 1211. At this time, the two first transition sections 1211 and the first concave section 1212 enclose a first receiving space for receiving a portion of the first support 141 to reduce the size between the inner container 120 and the outer container 110.

It should be noted that the structure of the third concave region 122 is substantially the same as that of the first concave region 121, and since the third concave region 122 is located at the edge of the inner container 120, the number of the first transition sections 1211 in the third concave region 122 is one, and the first concave section 1212 penetrates the edge of the inner container 120, and a first accommodating space is defined by the first concave section 1212 and the first transition sections 1211. Of course, in other embodiments of the present invention, the third recess 122 may also be spaced apart from the edge of the inner container 120, where the third recess 122 includes two first transition sections 1211.

Referring to fig. 1 to 3, in an embodiment, the second recessed area 131 includes a second transition section 1311 and a second recessed section 1312, where the second recessed section 1312 is recessed in a surface of the inner container 120, and the second transition section 1311 is in transition connection with two sides of the first recessed section 1212 and a surface of the heat shielding layer 130. Optionally, the structure of the fourth recess region 132 is the same as the structure of the second recess region 131.

The second transition section 1311 is used to transition between a second portion of the outer surface of the thermal shield 130 and the second recessed section 1312. That is, the second transition 1311 can transition between the normal-sized region and the recessed region of the outer surface of the thermal shield 130. As shown, the second transition section 1311 is disposed in a vertical direction, the second recessed section 1312 is disposed in a horizontal direction, and the vertical second transition section 1311 connects the normal-sized region of the outer surface of the heat shield layer 130 with the second recessed section 1312.

A second transition section 1311 is disposed at each end of the second concave section 1312, and the second concave section 1312 is connected to the normal-sized region of the outer surface of the heat shielding layer 130 at each end through the second transition section 1311. At this time, the two second transition sections 1311 and the second concave sections 1312 enclose a second receiving space for receiving a portion of the second support 142 to reduce the size between the inner container 120 and the outer container 110.

It should be noted that the structure of the fourth concave region 132 is substantially the same as that of the second concave region 131, and since the fourth concave region 132 is located at the edge of the heat shielding layer 130, the number of the second transition sections 1311 in the fourth concave region 132 is one, and the second concave sections 1312 penetrate through the edge of the heat shielding layer 130, and a second accommodating space is defined by the second concave sections 1312 and the second transition sections 1311. Of course, in other embodiments of the present invention, the fourth recessed area 132 may also be at the edge of the heat shielding layer 130 and spaced apart from the edge, where the fourth recessed area 132 includes two second transition sections 1311.

Referring to fig. 1 to 3, in an embodiment, the first recess region 121 has a recess depth ranging from 20mm to 100mm. This enables the first recessed area 121 to accommodate a longer sized first support 141. Correspondingly, the third recessed area 122 has a recessed depth ranging from 20mm to 100mm.

Referring to fig. 1 to 3, in an embodiment, the second recess region 131 has a recess depth ranging from 20mm to 100mm. This enables the second recessed area 131 to accommodate a longer sized second support 142. Correspondingly, the depth of the fourth recess region 132 ranges from 20mm to 100mm.

Referring to fig. 1 to 3, in an embodiment, the support structure 140 further includes a first fixing block 143, the first fixing block 143 is disposed on the first transition section 1211, one end of the first support member 141 is connected to the first recess region 121, and a height of the first fixing block 143 is smaller than, equal to, or slightly larger than a recess depth of the first recess region 121.

The first fixing block 143 is used to achieve a fixed mounting of the first support 141. The first fixing blocks 143 are provided at both ends of the first supporting member 141 to connect the inner container 120 with the outer container 110. Specifically, one of the first fixing blocks 143 is disposed in the first recess 121, the other first fixing block 143 is disposed on the inner wall of the outer container 110, one end of the first supporting member 141 is rotatably connected to the first fixing block 143 of the first recess 121, and the other end is rotatably mounted on the first fixing block 143 of the outer container 110.

The first fixing block 143 is disposed in the first recess 121, and thus can form a reinforcing structure to reinforce the local strength of the inner container 120, thereby further reducing the material thickness and size of the inner container 120. Optionally, a first fixed block 143 is disposed on the first transition section 1211. Of course, in other embodiments of the invention, the first fixed block 143 may also be disposed on the first transition 1211. Of course, in other embodiments of the present invention, the first fixing block 143 may be other mounting seats or other structures capable of mounting the first supporting member 141.

Referring to fig. 1 to 3, in an embodiment, the support structure 140 further includes a second fixing block 144, where the second fixing block 144 is disposed on the second transition section 1311, one end of the second support 142 is connected to the second concave region 131, and a height of the second fixing block 144 is smaller than, equal to, or slightly greater than a depth of the second concave region 131.

The second fixing block 144 is used to achieve a fixed mounting of the second support 142. The second fixing blocks 144 are disposed at both ends of the second support 142 to connect the heat shielding layer 130 with the outer container 110. Specifically, one of the second fixing blocks 144 is disposed in the second recess 131, the other second fixing block 144 is disposed on the inner wall of the outer container 110, one end of the second supporting member 142 is rotatably connected to the second fixing block 144 of the second recess 131, and the other end is rotatably mounted on the second fixing block 144 of the outer container 110.

The second fixing blocks 144 are disposed in the second concave regions 131, and can form a reinforcing structure to reinforce the local strength of the heat shielding layer 130, thereby further reducing the material thickness and size of the heat shielding layer 130. Optionally, a second fixed block 144 is disposed at the second transition 1311. Of course, in other embodiments of the invention, the second fixed 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 be another mounting seat or other structure capable of mounting the first supporting member 141.

Alternatively, the first fixing block 143 and the second fixing block 144 of the inner wall of the outer container 110 may be disposed to coincide. That is, the same fixing block is used to connect the first support 141 and the second support 142. Of course, in other embodiments of the present invention, the first fixing block 143 and the second fixing block 144 of the inner wall of the outer container 110 may be separately disposed.

Referring to fig. 1 and 2, in an embodiment of the present invention, a first recess is provided at a central region of the inner container 120, and the first recess includes a first recess region 121, a second recess is provided at a central region of the heat shielding layer 130, and the second recess includes a second recess region 131. The second outer tube 123 of the inner container 120 is provided with a first concave region 121 at a middle portion thereof in an axial direction, and an outer diameter of the first concave region 121 is smaller than an outer diameter of the second outer tube 123 of the inner container 120. As shown in fig. 2, the first fixing block 143 is located at the first transition 1211, and the height of the first fixing block 143 will not exceed the second outer cylinder 123 of the inner container 120, so the gap between the inner container 120 and the shielding cylinder can be greatly reduced. Illustratively, the inner vessel 120 and the thermal shield 130 need generally be provided with only 10mm, and the interlayer gap may be reduced by 50mm. Accordingly, the second fixing blocks 144 of the heat shielding layer 130 are disposed in the second recess areas 131, which further reduces the interlayer gap between the heat shielding layer 130 and the outer container 110 and the overall size of the cryostat 100.

Compared with the design of a conventional magnet, the interlayer gap between containers of each layer of the cryostat 100 can be reduced by more than 100mm, the diameter of the cryostat 100 is reduced by 200mm, the height of a sickbed is also reduced by more than 100mm, and for a 5T whole body imaging superconducting magnet, the height of the sickbed can be controlled to be less than 1.2m, and is usually 1.1m.

Referring to fig. 1 and 3, in another embodiment of the present invention, the first concave region 121 is disposed at an edge of the inner container 120, the second concave region 131 is disposed at an edge of the heat shielding layer 130, one end of the first support member 141 is connected to a circumferential side or end of the outer container 110, and one end of the second support member 142 is connected to a circumferential side or end of the outer container 110.

The third recess areas 122 of the inner container 120 are located at two ends of the second outer cylinder 123 of the inner container 120 in the axial direction, the first fixing blocks 143 are located at the first transition sections 1211 of the edges, the height of the first fixing blocks 143 will not exceed the height of the second outer cylinder 123 of the inner container 120, and the interlayer distance between the inner container 120 and the heat shielding layer 130 can be greatly reduced. The fourth concave areas 132 of the heat shielding layer 130 are positioned at two axial end parts of the third outer cylinder 133 of the heat shielding layer 130, the second fixing blocks 144 are positioned at the second transition sections 1311 of the edges, the height of the second fixing blocks 144 does not exceed the height of the third outer cylinder 133 of the heat shielding layer 130, and the interlayer distance between the heat shielding layer 130 and the outer container 110 can be greatly reduced.

Optionally, the heat shielding layer 130 is symmetrically disposed with the recessed areas at both ends of the inner container 120 and the support structure 140. Alternatively, the second fixing block 144 and the first fixing block 143 on the outer container 110 may be disposed on the inner wall of the outer container 110, or may be disposed on the first sealing plate 113 of the outer container 110.

Referring to fig. 1 to 3, after the above-mentioned concave arrangement can be adopted in the cryostat 100 according to the present invention, the distance between the inner container 120 and the outer container 110 can be effectively reduced, and thus the overall size of the cryostat 100 can be reduced, so that the cryostat 100 has smaller external shape, center height and installation size. When the cryostat 100 is applied to a magnetic resonance system for 5T whole body scanning, the small interlayer clearance between containers and the small external dimension of the containers can be obtained, and meanwhile, the height of a sickbed is controlled to be not more than 1.2m, so that the height is suitable for the sickbed of conventional magnetic resonance equipment, and no special requirement is imposed on an installation site; meanwhile, the ladder-type outer coil structure can optimize the range of a 5 Gaussian escape field to be not more than 3.8 multiplied by 4.3m, so that the space size of an installation field is greatly saved, and certain product advantages are realized.

Referring to fig. 1 to 3, the present invention also provides a superconducting magnet structure including a cryostat 100 and a magnet assembly 200, the magnet assembly 200 being disposed in the cryostat 100, the cryostat 100 including an outer vessel 110, an inner vessel 120, a thermal shield 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 encloses a mounting space with the outer container 110. A heat shielding layer 130 is disposed in the installation space; the surface of the inner container 120 has a first recess portion recessed toward the inner side of the inner container 120, and/or the surface of the heat shielding layer 130 has a second recess portion recessed toward the inner container 120, and the first recess portion and the second recess portion are disposed correspondingly. The supporting structure 140 includes a first supporting member 141 and a second supporting member 142, one end of the first supporting member 141 is disposed in the first recess portion, the other end is connected to the outer container 110, one end of the second supporting member 142 is disposed in the second recess portion, and the other end is connected to the outer container 110.

The superconducting magnet structure of the present invention employs the cryostat 100 of the above embodiment, and is not described in detail herein. The superconducting magnet structure can effectively reduce the size of the superconducting magnet structure after the cryostat 100 is adopted, so that the superconducting magnet structure has smaller appearance, center height and installation size. When the superconducting magnet structure is applied to a magnetic resonance system of 5T whole-body scanning, the gap between the layers of the smaller container and the external dimension of the smaller container can be obtained, and meanwhile, the height of a sickbed is controlled to be not more than 1.2m, so that the height is suitable for the sickbed of conventional magnetic resonance equipment, and no special requirement is imposed on an installation site; meanwhile, the ladder-type outer coil structure can optimize the range of a 5 Gaussian dissipation field not to exceed 3.8x4.3m, so that the space size of an installation field is greatly saved, and certain product advantages are achieved.

Referring to fig. 1 to 3, in an embodiment, the magnet assembly 200 includes a main coil and a shield coil disposed outside the main coil. The design structure of the shielding coil is adapted to the stepped structure/stepped structure of the surface of the inner container 120, the shielding coil comprises a first magnet coil 210 and a second magnet coil 220, the outer diameter of the first magnet coil 210 is larger than that of the second magnet coil 220, the first magnet coil 210 is arranged in the inner container 120, and the second magnet coil 220 is arranged corresponding to the first concave portion.

In one embodiment, the first magnet coil 210 of the shield coil forms a high coil region and the second magnet coil 220 of the shield coil forms a low coil region. The radial dimension of the low coil area is 20% -60% of the radial dimension of the high coil area, so that a good shielding effect is obtained. The high coil section is located at the end of the inner vessel 120 and the low coil section is located adjacent the end of the inner vessel 120 in the middle region.

In one embodiment, the width of the coil region of the shield coil is generally less than the width of the inner container 120 in the container axis direction, and the axial width of the low coil region is not less than 50% of the axial width of the high coil region. In 5T high field superconductivity, the axial length of the shield coil is typically over 500mm, wherein: the height of the high coil area is usually more than 50mm, and the height of the low coil area is usually less than 25mm, so that a concave area with a depth of more than 25mm can be formed. The arrangement can fully utilize the special-shaped space formed by the concave of the container, and simultaneously, for the electromagnetic design of the coil, the combination of high and low coil areas gives more degrees of freedom to the optimization of the electromagnetic stray field, so that the coil design is easier to obtain better uniformity in the FOV area; in addition, by changing the step coil size or the width of the low coil region, the 5 gauss evanescent field range can be greatly reduced.

Magnet assembly 200 is the component of the superconducting magnet structure that produces a magnet. Since the outer surface of the inner container 120 is provided with the first recess, the first recess may limit the size of the magnet assembly 200. For this, the present invention provides the magnet assembly 200 in a stepped configuration to accommodate the first recess of the inner container 120 and the normal-sized region of the inner container 120.

Specifically, the magnet assembly 200 includes a first magnet coil 210 and a second magnet coil 220, the first magnet coil 210 and the second magnet coil 220 are disposed along an axial direction, and an outer diameter of the first magnet coil 210 is larger than an outer view of the second magnet coil 220. After the first magnet coil 210 and the second magnet coil 220 are disposed in the inner container 120, the first magnet coil 210 corresponds to the normal size region of the inner container 120, and the second magnet coil 220 corresponds to the first recess of the inner container 120.

As shown in fig. 1 and 2, in one embodiment of the present invention, the first recess is located in a central region of the inner container 120. At this time, the first magnet coil 210 is positioned at the left side corresponding to the normal size region of the edge of the inner container 120, and the second magnet coil 220 is positioned at the right side of the first magnet coil 210 corresponding to the first recess region 121. That is, the first magnet coil 210 is located near the normal-sized region of the inner container 120, and the second magnet coil 220 is located near the first recess region 121 of the inner container 120.

The axial width of the first magnet coil 210 and the second magnet coil 220 in the axial direction of the inner container 120 is smaller than the axial extent of the inner container 120, and the axial width of the second magnet coil 220 is larger than the axial width of the first magnet coil 210. This arrangement can fully utilize the irregularly shaped space formed by the concave shape of the inner container 120, and simultaneously, for the electromagnetic design of the coil, the combination of the high and low coils of the first magnet coil 210 and the second magnet coil 220 gives more freedom to optimize the electromagnetic stray field, and 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 5 gauss stray field range can be greatly reduced. In particular, for 5T high field magnets for whole body imaging, the 5 gauss evanescent field range can be narrowed to below the range of 3.8x4.3m.

In another embodiment of the invention, as shown in fig. 3, the second recess is located at an edge of the inner container 120. At this time, the first magnet coil 210 is positioned at the right side corresponding to the normal size region of the middle region of the inner container 120, and the second magnet coil 220 is positioned at the left side of the first magnet coil 210 corresponding to the second recess region 131. That is, the first magnet coil 210 is located near the normal-sized region of the inner container 120, and the second magnet coil 220 is located near the first recess region 121 of the inner container 120.

The invention also provides a magnetic resonance system, which comprises a superconducting magnet structure and a refrigerator, wherein the refrigerator is arranged on the superconducting magnet structure and is used for cooling an excitation coil of the superconducting magnet structure; the superconducting magnet structure comprises a cryostat 100 and a magnet assembly 200, the magnet assembly 200 being disposed in the cryostat 100. The cryostat 100 includes an outer vessel 110, an inner vessel 120, a thermal shield 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 encloses a mounting space with the outer container 110. A heat shielding layer 130 is disposed in the installation space; the surface of the inner container 120 has a first recess portion recessed toward the inner side of the inner container 120, and/or the surface of the heat shielding layer 130 has a second recess portion recessed toward the inner container 120, and the first recess portion and the second recess portion are disposed correspondingly. The supporting structure 140 includes a first supporting member 141 and a second supporting member 142, one end of the first supporting member 141 is disposed in the first recess portion, the other end is connected to the outer container 110, one end of the second supporting member 142 is disposed in the second recess portion, and the other end is connected to the outer container 110.

After the superconducting magnet structure of the embodiment is adopted by the magnetic resonance system, the outline size of the magnetic resonance system can be effectively reduced, so that the magnetic resonance system has smaller outline, center height and installation size.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A cryostat (100) characterized by comprising:

an outer container (110), the outer container (110) having a hollow magnet bore;

An inner container (120) provided in the outer container (110) and enclosing an installation space with the outer container (110); and

a heat shielding layer (130) disposed in the installation space;

the surface of the inner container (120) is provided with a first concave part which is concave towards the inner side of the inner container (120), and/or the surface of the heat shielding layer (130) is provided with a second concave part which is concave towards the direction of the inner container (120), and the first concave part and the second concave part are correspondingly arranged.

2. The cryostat (100) of claim 1, wherein the first recess comprises a first recess region (121) and/or a third recess region (122), the first recess region (121) being disposed in a central region of the inner vessel (120), the third recess region (122) being disposed at an edge of the inner vessel (120);

the second concave part comprises a second concave region (131) and/or a fourth concave region (132), the second concave region (131) is arranged corresponding to the first concave region (121), and the fourth concave region (132) is arranged corresponding to the second concave region (131).

3. The cryostat (100) of claim 2, wherein the first recessed region (121) comprises a first transition section (1211) and a first recessed section (1212), the first recessed section (1212) being disposed recessed from a surface of the inner vessel (120), the first transition section (1211) transitional connecting both sides of the first recessed section (1212) with the surface of the inner vessel (120).

4. A cryostat (100) as claimed in claim 3 wherein the second recessed region (131) comprises a second transition section (1311) and a second recessed section (1312), the second recessed section (1312) being disposed recessed from the surface of the inner vessel (120), the second transition section (1311) being transitional to both sides of the first recessed section (1212) and the surface of the heat shield (130).

5. The cryostat (100) of claim 4, wherein said cryostat (100) further comprises:

the supporting structure (140) comprises a first supporting piece (141) and a second supporting piece (142), one end of the first supporting piece (141) is arranged in the first concave portion, the other end of the first supporting piece is connected with the outer container (110), one end of the second supporting piece (142) is arranged in the second concave portion, and the other end of the second supporting piece is connected with the outer container (110).

6. The cryostat (100) of claim 5, wherein said support structure (140) further comprises a first fixed block (143), said first fixed block (143) being disposed in a first recessed region (121), one end of said first support member (141) being connected to said first fixed block (143);

the support structure (140) further comprises a second fixing block (144), the second fixing block (144) is arranged on the second transition section (1311), and one end of the second support piece (142) is connected with the second concave area (131).

7. The cryostat (100) of claim 5, wherein the first recessed region (121) is disposed at an edge of the inner vessel (120), the second recessed region (131) is disposed at an edge of the thermal shield layer (130), one end of the first support (141) is connected to a peripheral side or end of the outer vessel (110), and one end of the second support (142) is connected to a peripheral side or end of the outer vessel (110).

8. A superconducting magnet structure comprising a cryostat (100) and a magnet assembly (200), the magnet assembly (200) being disposed in the cryostat (100), the cryostat (100) comprising:

an outer container (110), the outer container (110) having a hollow magnet bore;

an inner container (120) provided in the outer container (110) and enclosing an installation space with the outer container (110);

a heat shielding layer (130) disposed in the installation space; the surface of the inner container (120) is provided with a first concave part which is concave towards the inner side of the inner container (120), the surface of the heat shielding layer (130) is provided with a second concave part, and/or the second concave part is concave towards the direction of the inner container (120), and the first concave part and the second concave part are correspondingly arranged.

9. The superconducting magnet structure according to claim 8, wherein the magnet assembly (200) comprises a first magnet coil (210) and a second magnet coil (220), the first magnet coil (210) having an outer diameter greater than an outer diameter of the second magnet coil (220), the first magnet coil (210) being disposed in the inner container (120), the second magnet coil (220) being disposed in correspondence of the first recess.

10. A magnetic resonance system, comprising a superconducting magnet structure and a refrigerator arranged on the superconducting magnet structure for cooling an exciting coil of the superconducting magnet structure; the superconducting magnet structure comprises a cryostat (100) and a magnet assembly (200), the magnet assembly (200) being disposed in the cryostat (100), the cryostat (100) comprising:

an outer container (110), the outer container (110) having a hollow magnet bore;

an inner container (120) provided in the outer container (110) and enclosing an installation space with the outer container (110);

a heat shielding layer (130) disposed in the installation space; the surface of the inner container (120) is provided with a first concave part which is concave towards the inner side of the inner container (120), the surface of the heat shielding layer (130) is provided with a second concave part, and/or the second concave part is concave towards the direction of the inner container (120), and the first concave part and the second concave part are correspondingly arranged; and

The supporting structure (140) comprises a first supporting piece (141) and a second supporting piece (142), one end of the first supporting piece (141) is arranged in the first concave portion, the other end of the first supporting piece is connected with the outer container (110), one end of the second supporting piece (142) is arranged in the second concave portion, and the other end of the second supporting piece is connected with the outer container (110).