Gradient coil replacing device and magnetic resonance imaging system

Abstract

The invention relates to a gradient coil replacing device and a magnetic resonance imaging system. The gradient coil replacing device comprises a support assembly, a horizontal moving mechanism and a supporting body. The support assembly is used for being matched with a scanning bed of the magnetic resonance imaging equipment. The horizontal moving mechanism is arranged on the support assembly. The support body is provided with a first placing groove and a second placing groove which are arranged along a first direction, the first placing groove and the second placing groove respectively extend along a second direction, the support body is movably arranged on the horizontal moving mechanism along the first direction, and when the support assembly is matched with the scanning bed, the second direction is parallel to the moving direction of the scanning bed. The whole replacement process is simple and convenient, rapid positioning of the gradient coil can be achieved, manual carrying in the replacement process is avoided, and the safety during gradient coil replacement is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic resonance imaging, and particularly to a gradient coil replacement device and a magnetic resonance imaging system. Background Art

[0002] The gradient coil is one of the components of a magnetic resonance imaging device, which is used to apply an additional increasing (or decreasing) gradient magnetic field on the main magnetic field. Commonly used gradient coils are heavy in weight and large in volume, requiring a large space for transportation, and are relatively difficult to transport and install. For large magnetic resonance imaging devices applied to the human body for disease diagnosis, special tools are used for coil replacement during initial installation or gradient coil maintenance. The replacement frequency is relatively low. Moreover, when installing the gradient coil in a strong magnetic field environment, it is often necessary to reduce the magnetic field operation, which is rather cumbersome and the cost of reducing the magnetic field is high. For small magnetic resonance imaging devices applied to small animals mainly for scientific research, different gradient coils need to be replaced relatively frequently to meet the requirements of different test conditions.

[0003] However, the mass of a single gradient coil generally exceeds 100 kilograms. When manually handling and installing it, a large amount of labor is consumed. For example, first, the removed gradient coil needs to be carried out of the magnetic resonance examination room, and then a new gradient coil needs to be carried into the magnetic resonance examination room. Moreover, before the installation process, it is also necessary to manually align the new gradient coil with the axis of the scanning cavity of the magnetic resonance imaging device. The installation operation is complex, and there are also certain potential safety hazard problems during the operation process. The existing gradient coil replacement devices have complex structures and inconvenient operations, which are not conducive to the gradient coil replacement operation. Summary of the Invention

[0004] Based on this, in view of the problem of difficult gradient coil replacement, it is necessary to provide a gradient coil replacement device and a magnetic resonance imaging system.

[0005] A gradient coil replacement device, the gradient coil replacement device includes:

[0006] A bracket assembly for cooperating with the scanning bed of a magnetic resonance imaging device;

[0007] A horizontal moving mechanism disposed on the bracket assembly; and

[0008] A support body having a first placement groove and a second placement groove arranged along a first direction, the first placement groove and the second placement groove respectively extending along a second direction, the first placement groove being used for placing the gradient coil to be disassembled, the second placement groove being used for placing the gradient coil to be installed, and the support body being movably disposed on the horizontal moving mechanism along the first direction.

[0009] In one embodiment, the bracket assembly includes:

[0010] Upper bracket, on which the horizontal moving mechanism is arranged,

[0011] Bottom bracket, oppositely arranged at the bottom of the upper bracket;

[0012] Connecting bracket, arranged between the upper bracket and the bottom bracket, and one end of the upper bracket close to the scanning bed extends outside the connecting bracket; and

[0013] Caster wheels, arranged on the bottom bracket.

[0014] In one embodiment, the upper bracket has a first end and a second end along the second direction, the distance between the connecting bracket and the first end is greater than the distance between the connecting bracket and the second end, and the connecting bracket is inclined to the bottom bracket and the upper bracket respectively.

[0015] In one embodiment, the bracket assembly includes a first limiting member and a second limiting member, the first limiting member is perpendicular to the second limiting member, the first limiting member is used to cooperate with one side of the scanning bed along the first direction, and the second limiting member is used to cooperate with one side of the scanning bed along the second direction.

[0016] In one embodiment, the horizontal moving mechanism includes:

[0017] Guide rail, arranged on the bracket assembly along the first direction; and

[0018] Slider, slidably connected to the guide rail, and the support body is arranged on the slider.

[0019] In one embodiment, the horizontal moving mechanism further includes a limiting block and a stop block, the limiting block is connected to the slider, the stop block is arranged on the bracket assembly and located on both sides of the limiting block along the first direction, and the distance between the two stop blocks is equal to the distance between the central axis of the first placement groove along the first direction and the central axis of the second placement groove along the first direction.

[0020] In one embodiment, the gradient coil replacement device further includes a locking mechanism, which cooperates with the limiting block to lock the limiting block.

[0021] In one embodiment, the locking mechanism includes a control rod and an elastic bolt, a locking groove is formed on the control rod, the elastic bolt is used to pass through the limiting block and cooperate with the locking groove, and rotating the control rod is used to move the elastic bolt from inside the locking groove to outside the locking groove.

[0022] In one embodiment, two side walls of the locking groove along the circumferential direction of the control rod are connected to the side wall of the control rod through an arc surface.

[0023] In one embodiment, the control rod extends along a first direction, and at least two locking grooves are sequentially formed on the control rod along the first direction, and the opening directions of two adjacent locking grooves are opposite.

[0024] In one embodiment, the gradient coil replacement device further includes a height adjustment mechanism, the height adjustment mechanism is arranged on the horizontal movement mechanism, and the height adjustment mechanism is fixedly connected to the support body.

[0025] In one embodiment, the height adjustment mechanism includes:

[0026] A first support plate, which is slidably connected to the horizontal movement mechanism;

[0027] A second support plate, which is detachably arranged above the first support plate, and the second support plate is fixedly connected to the support body; and

[0028] An adjusting screw, which is threadedly connected to the second support plate, and one end of the adjusting screw passing through the second support plate abuts against the first support plate.

[0029] In one embodiment, a fixed baffle is arranged at one end of the support body along a second direction, and a sliding baffle is arranged at the other end along the second direction, and the sliding baffle can slide from the position of the first placement groove to the position of the second placement groove.

[0030] In one embodiment, a plurality of rollers arranged in sequence along the second direction are respectively arranged on the inner walls of the first placement groove and the second placement groove.

[0031] In one embodiment, at least a pair of handles are arranged on both sides of the support body along the first direction.

[0032] In one embodiment, the bracket assembly further includes a brake assembly, and the brake assembly is connected to the casters.

[0033] A magnetic resonance imaging system includes a magnetic resonance imaging device and the gradient coil replacement device, the magnetic resonance imaging device includes a magnet, a gradient coil and a scanning bed, the magnet has a scanning cavity, the gradient coil is detachably arranged in the scanning cavity, the scanning bed is slidably connected to the magnet along a second direction and can slide into the scanning cavity, and the bracket assembly is used to cooperate with the scanning bed.

[0034] When the above-mentioned gradient coil replacement device and magnetic resonance imaging system are used to replace the trapezoidal coil, the support assembly cooperates with the scanning bed. The position of the support assembly is located through the scanning bed, and then the support body is driven to move by the horizontal movement mechanism, so that the first placement groove and the second placement groove are respectively aligned with the center of the scanning cavity in sequence, so as to disassemble and install the gradient coil. The whole replacement process is simple and convenient, the rapid positioning of the gradient coil can be realized, manual handling during the replacement process is avoided, and the safety during the replacement of the gradient coil is ensured. At the same time, there is no need to move out the scanning bed during the replacement process, so there is no need to reduce the field strength, and the operation difficulty and operation cost are reduced. Description of the Drawings

[0035] Figure 1 FIG. is a schematic structural diagram of the support assembly cooperating with the scanning bed in an embodiment.

[0036] Figure 2 FIG. is a schematic structural diagram of the support assembly in an embodiment.

[0037] Figure 3 FIG. is a schematic assembly structural diagram of the horizontal movement mechanism, the locking mechanism and the height adjustment mechanism in an embodiment.

[0038] Figure 4 FIG. is a schematic assembly structural diagram of the height adjustment mechanism and the support body in an embodiment.

[0039] Figure 5 FIG. is a schematic structural diagram of three locking grooves on the control rod in an embodiment.

[0040] Figure 6 FIG. is a schematic diagram of the locking and unlocking process of the locking mechanism in an embodiment.

[0041] Figure 7 FIG. is a schematic structural diagram of the support body in an embodiment.

[0042] Figure 8 FIG. is a schematic diagram of the state where the placement groove is aligned with the scanning cavity before disassembling the gradient coil in an embodiment.

[0043] Figure 9 FIG. is a schematic structural diagram of the state where the gradient coil is disassembled into the placement groove in an embodiment.

[0044] Figure 10 FIG. is a schematic diagram of the state where the gradient coil to be installed is aligned with the scanning cavity in an embodiment.

[0045] Figure 11 FIG. is a schematic diagram of the state where the gradient coil to be installed is installed into the scanning cavity in an embodiment.

[0046] Reference numerals: 10, magnetic resonance imaging device; 11, gradient coil; 12, scanning bed; 13, scanning cavity; 14, magnet;

[0047] 100, Bracket assembly; 110, Upper bracket; 111, First end; 112, Second end; 120, Bottom bracket; 130, Connecting bracket; 140, Caster; 150, First limiting member; 160, Second limiting member;

[0048] 200, Horizontal moving mechanism; 210, Guide rail; 220, Slide block; 230, Stop block; 231, First stop block; 232, Second stop block; 240, Limiting block;

[0049] 300, Support body; 310, First placement groove; 320, Second placement groove; 330, Handle; 340, Roller;

[0050] 400, Locking mechanism; 410, Control rod; 411, Locking groove; 4111, First locking groove; 4112, Second locking groove; 4113, Third locking groove; 420, Elastic bolt;

[0051] 500, Height adjusting mechanism; 510, First support plate; 520, Second support plate; 530, Adjusting screw;

[0052] 610, Fixed baffle; 620, Sliding baffle. Detailed implementation manners

[0053] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0054] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0055] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0056] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In this application, unless otherwise clearly specified and defined, if there are descriptions such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0058] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0059] Refer to Figure 1 and Figure 2, a gradient coil 11 replacement device provided by an embodiment of the present application. The gradient coil 11 replacement device includes a bracket assembly 100, a horizontal moving mechanism 200, and a support body 300. The bracket assembly 100 is used to cooperate with the scanning bed 12 of the magnetic resonance imaging device. The horizontal moving mechanism 200 is arranged on the bracket assembly 100. The support body 300 has a first placement groove 310 and a second placement groove 320 arranged along the first direction OX. The first placement groove 310 and the second placement groove 320 extend along the second direction OY respectively. The first placement groove 310 is used to place the gradient coil 11 to be disassembled, and the second placement groove 320 is used to place the gradient coil 11 to be installed. The support body 300 is movably arranged on the horizontal moving mechanism 200 along the first direction OX. When the bracket assembly 100 cooperates with the scanning bed 12, the second direction OY is parallel to the moving direction of the scanning bed 12. The first direction OX is perpendicular to the second direction OY.

[0060] When the gradient coil 11 needs to be replaced, first place the gradient coil 11 to be installed in the second placement groove 320, and then move the bracket assembly 100 so that the bracket assembly 100 cooperates with the scanning bed 12. At this time, the moving direction of the scanning bed 12 is parallel to the second direction OY, that is, the length direction of the gradient coil 11 to be disassembled in the magnetic resonance imaging device is parallel to the second direction OY. Then drive the support body 300 to move along the first direction OX through the horizontal moving mechanism 200 so that the first placement groove 310 is aligned with the gradient coil 11 to be disassembled, and then remove the gradient coil 11 to be disassembled so that the gradient coil 11 to be disassembled is located in the first placement groove 310. Finally, drive the support body 300 to move along the first direction OX again through the horizontal moving mechanism 200 so that the second placement groove 320 is aligned with the scanning cavity of the magnetic resonance imaging device, and install the gradient coil 11 to be installed into the scanning cavity. That is, the replacement of the gradient coil 11 is completed.

[0061] In this embodiment, through the settings of the bracket assembly 100, the horizontal moving mechanism 200, and the first placement groove 310 and the second placement groove 320, when replacing the trapezoidal coil, the bracket assembly 100 cooperates with the scanning bed 12, the position of the bracket assembly 100 is located by the scanning bed 12, and then the support body 300 is driven to move through the horizontal moving mechanism 200 so that the first placement groove 310 and the second placement groove 320 are respectively aligned with the center of the scanning cavity in sequence, so as to disassemble and install the gradient coil 11. The whole replacement process is simple and convenient, the rapid positioning of the gradient coil 11 can be realized, manual handling during the replacement process is avoided, and the safety during the replacement of the gradient coil 11 is ensured. At the same time, the scanning bed 12 does not need to be removed during the replacement process, so the field strength does not need to be reduced, and the operation difficulty and operation cost are reduced.

[0062] In some embodiments, in combination with Figure 2, the support assembly 100 includes an upper support 110, a bottom support 120, a connecting support 130, and casters 140. The horizontal movement mechanism 200 is disposed on the upper support 110, and the bottom support 120 is relatively disposed at the bottom of the upper support 110. The connecting support 130 is disposed between the upper support 110 and the bottom support 120, and one end of the upper support 110 close to the scanning bed 12 extends outside the connecting support 130. The casters 140 are disposed on the bottom support 120.

[0063] In some embodiments, the upper support 110 and the bottom support 120 are relatively disposed, and the cross-section of the upper support 110, the bottom support 120, and the support assembly 100 perpendicular to the first direction OX is an I-shaped structure. The scanning bed 12 can be inserted between the upper support 110 and the bottom support 120. That is, during the replacement process, it is not necessary to remove the scanning bed 12, so it is not necessary to reduce the field strength, reducing the operation difficulty and operation cost. In addition, since the scanning bed 12 can be inserted between the upper support 110 and the bottom, it is convenient to replace the gradient coil 11 in a narrow and limited space.

[0064] The casters 140 are disposed on the bottom support 120, facilitating the movement of the replacement device. Specifically, the support assembly 100 further includes a braking assembly, and the braking assembly is connected to the casters 140. The braking assembly can be a handbrake disposed on the upper support 110 or a foot brake disposed on the bottom support 120. After the support assembly 100 is engaged with the scanning bed 12, the casters 140 can be clamped by the braking assembly to fix the support assembly 100.

[0065] Furthermore, the upper support 110 has a first end 111 and a second end 112 along the second direction OY, and the distance between the connecting support 130 and the first end 111 is greater than the distance between the connecting support 130 and the second end 112.

[0066] During actual use, move the support assembly 100 so that the scanning bed 12 is inserted between the upper support 110 and the bottom from the first end 111, and engage the support assembly 100 with the scanning bed 12. Then move the horizontal movement mechanism 200, and directly disassemble the gradient coil 11 and pull it into the first placement slot 310 or load it into the scanning cavity from the second placement slot 320. The distance between the connecting support 130 and the first end 111 is greater than the distance between the connecting support 130 and the second end 112, thereby increasing the depth of insertion of the scanning bed 12 into the upper support 110 and the bottom support 120, reducing the gap between the upper support 110 and the end of the scanning cavity, facilitating the operator to quickly drag the gradient coil 11 to be disassembled onto the upper support 110, and at the same time, facilitating the operator to quickly drag the gradient coil 11 to be installed into the scanning cavity, reducing the manual handling process.

[0067] In some embodiments, the connecting bracket 130 is inclined with respect to the bottom bracket 120 and the upper bracket 110 respectively. That is, the connecting bracket 130 is not perpendicular to the bottom bracket 120 and the upper bracket 110. One end of the connecting bracket 130 connected to the upper bracket 110 is inclined towards the side of the scanning bed 12. The inclined setting of the connecting bracket 130 is beneficial to maintaining the balance and stability of the entire replacement device.

[0068] Furthermore, both sides of the upper bracket 110 along the first direction OX and both sides of the bottom bracket 120 along the first direction OX are respectively connected in one-to-one correspondence through the connecting brackets 130.

[0069] Specifically, the number of the connecting brackets 130 is two. One connecting bracket 130 connects one end of the upper bracket 110 and the bottom bracket 120 along the first direction OX, and the other connecting bracket 130 connects the other end of the upper bracket 110 and the bottom bracket 120 along the first direction OX. During use, the connecting brackets 130 are arranged on both sides of the upper bracket 110 and the bottom bracket 120, facilitating the insertion of the scanning bed 12 between the two connecting brackets 130, further reducing the total length of the bracket assembly 100 and facilitating its use in a narrow and limited space.

[0070] In some embodiments, in combination Figure 1 , the bracket assembly 100 includes a first limiting member 150 and a second limiting member 160. The first limiting member 150 is perpendicular to the second limiting member 160. The first limiting member 150 is used to cooperate with one side of the scanning bed 12 along the first direction OX, and the second limiting member 160 is used to cooperate with one side of the scanning bed 12 along the second direction OY.

[0071] Specifically, it can be arranged such that the first limiting member 150 abuts against one side of the scanning bed 12 along the first direction OX, and the second limiting member 160 abuts against one side of the scanning bed 12 along the second direction OY. And since the first limiting member 150 is perpendicular to the second limiting member 160, that is, through the limiting action of the first limiting member 150 and the second limiting member 160, it can be ensured that the axial direction of the gradient coil 11 to be disassembled in the magnetic resonance imaging device is parallel to the second direction OY, facilitating the subsequent alignment of the first placement groove 310 with the scanning cavity of the gradient coil 11 only through the horizontal moving mechanism 200.

[0072] Furthermore, the first limiting member 150 and the second limiting member 160 can both be installed on the connecting bracket 130.

[0073] In some embodiments, in combination Figure 3 , the horizontal moving mechanism 200 includes a guide rail 210 and a slider 220. The guide rail 210 is arranged on the bracket assembly 100 along the first direction OX. The slider 220 is slidably connected to the guide rail 210, and the support body 300 is arranged on the slider 220.

[0074] Specifically, both ends of the support body 300 along the second direction OY extend out of the upper support 110 respectively. Guide rails 210 are respectively arranged at both ends of the upper support 110 along the length direction. The bottom of the support body 300 is correspondingly connected to the two guide rails 210 through two sliders 220. Combining Figure 7 , at least one pair of handles 330 are arranged on both sides of the support body 300 along the first direction OX. The support body 300 can be pushed through the handles 330. When the support body 300 is pushed, the support body 300 can drive the slider 220 to move along the guide rail 210.

[0075] Specifically, two pairs of handles 330 are arranged on both sides of the support body 300 along the first direction OX. One pair of handles 330 is located at one end of the support body 300 close to the second direction OY, and the other pair of handles 330 is located at the other end of the support body 300 close to the second direction OY. The two handles 330 in one pair of handles 330 are respectively located on both sides of the support body 300 at opposite positions along the first direction OX.

[0076] In some embodiments, the horizontal movement mechanism 200 further includes a limit block 240 and a stop block 230. The limit block 240 is connected to the slider 220. The stop block 230 is arranged on the bracket assembly 100 and is located on both sides of the limit block 240 along the first direction OX. The distance between the two stop blocks 230 is equal to the distance between the central axis of the first placement groove 310 along the first direction OX and the central axis of the second placement groove 320 along the first direction OX.

[0077] In this embodiment, after the bracket assembly 100 is combined with the scanning bed 12, when the slider 220 drives the support body 300 to slide until it abuts against one of the stop blocks 230, the first placement groove 310 is aligned with the scanning cavity; when the slider 220 drives the support body 300 to slide until it abuts against the other stop block 230, the second placement groove 320 is aligned with the scanning cavity. After the bracket assembly 100 is combined with the scanning bed 12, through the limiting effect of the stop block 230, the first placement groove 310 or the second placement groove 320 can be quickly aligned with the scanning cavity respectively, improving the replacement efficiency of the gradient coil 11.

[0078] Specifically, combining Figure 7 , a plurality of rollers 340 arranged in sequence along the second direction OY are respectively arranged on the inner walls of the first placement groove 310 and the second placement groove 320. The gradient coil 11 is used to be arranged on the rollers. Due to the rolling effect of the rollers 340, the gradient coil 11 can easily slide into the scanning cavity or easily slide out into the placement groove.

[0079] In some embodiments, the rollers 340 are along the first direction OX so that the gradient coil 11 can easily slide in the first placement groove 310 and the second placement groove 320.

[0080] Of course, in other embodiments, the axial direction of the roller 340 may be parallel to the first direction OX, or the roller 340 may also be a universal wheel.

[0081] In some embodiments, the gradient coil 11 replacement device further includes a locking mechanism 400. The locking mechanism 400 cooperates with the limiting block 240 to lock the limiting block 240, and further lock the slider 220 and the support 300, so as to prevent the horizontal movement mechanism 200 from driving the support 300 to move along the first direction OX when disassembling or installing the gradient coil 11.

[0082] Furthermore, the locking mechanism 400 includes a control rod 410 and an elastic bolt 420. A locking groove 411 is formed on the control rod 410. The elastic bolt 420 is used to pass through the slider 220 and cooperate with the locking groove 411. Rotating the control rod 410 is used to move the elastic bolt 420 from inside the locking groove 411 to outside the locking groove 411.

[0083] In this embodiment, through the arrangement of the control rod 410 and the elastic bolt 420, when the control rod 410 is rotated and the slider 220 drives the elastic bolt 420 to move to the position of the locking groove 411, the elastic bolt 420 can be inserted into the locking groove 411. At this time, the elastic bolt 420 locks the positions of the limiting block 240 and the support 300. When it is necessary to move the support 300, the control rod 410 is rotated again. At this time, the elastic bolt 420 is located outside the locking groove 411, the limiting block 240 and the support 300 are unlocked, and the support 300 can move again.

[0084] Specifically, the two side walls of the locking groove 411 along the circumferential direction of the control rod 410 are connected to the side wall of the control rod 410 through an arc surface.

[0085] It can be understood that when the control rod 410 is rotated to move the elastic bolt 420 outside the locking groove 411, the end of the bolt inserted into the locking groove 411 can move along the arc surface to move from inside the locking groove 411 to outside the locking groove 411, so that the slider 220 is locked, and the operation is simple.

[0086] In some embodiments, combined with Figure 5 , the control rod 410 extends along the first direction OX. At least two locking grooves 411 are sequentially formed on the control rod 410 along the first direction OX, and the opening directions of two adjacent locking grooves 411 are opposite.

[0087] In this embodiment, the control rod 410 has a cylindrical structure, and the opening directions of two adjacent locking slots 411 are opposite, that is, the openings of two adjacent locking slots 411 are arranged at 180 degrees. Here, for the convenience of description, two adjacent locking slots 411 are respectively defined as a first locking slot 4111 and a second locking slot 4112. Combining Figure 6 , when the control rod 410 is rotated so that the elastic bolt 420 located in the first locking slot 4111 is pushed out of the first locking slot 4111, and the support 300 is pushed along the first direction OX. When the support 300 drives the limit block 240 to move to the position of the second locking slot 4112, at this time, the notch of the second locking slot 4112 just aligns with the elastic bolt 420, that is, only by pressing the elastic bolt 420 can it be locked, and there is no need to rotate the control rod 410 again.

[0088] Of course, in other embodiments, the opening directions of two adjacent locking slots 411 can also be set at other angles, such as 60 degrees, 90 degrees or 120 degrees. At this time, when the control rod 410 is rotated so that the elastic bolt 420 is outside the first locking slot 4111, when it is necessary to insert the elastic bolt 420 into the second locking slot 4112, the control rod 410 needs to be rotated again so that the notch of the second locking slot 4112 aligns with the elastic bolt 420.

[0089] Specifically, the locking slot 411 includes a first locking slot 4111, a second locking slot 4112 and a third locking slot 4113 arranged in sequence, and the stop block 230 includes a first stop block 231 and a second stop block 232. The first locking slot 4111 is arranged close to the first stop block 231 and is used to lock the support 300 at the resisting position of the first stop block 231. The second locking slot 4112 is arranged close to the first stop block 231 and is used to lock the support 300 at the resisting position of the second stop block 232.

[0090] When the gradient coil 11 replacement device is not in use, the elastic bolt 420 is inserted into the second locking slot 4112. At this time, the support 300 is located in the middle of the support assembly 100 along the first direction OX. When the gradient coil 11 needs to be replaced, first place the gradient coil 11 to be installed in the second placement groove 320. Then move the support assembly 100 so that the support assembly 100 cooperates with the scanning bed 12. Then rotate the control rod 410 so that the elastic bolt 420 pops out of the second locking slot 4112, and then push the support 300. When the limit block 240 abuts against the first stop block 231, the first placement groove 310 is directly opposite to the center position of the scanning cavity, as Figure 8 shown. At this time, press the elastic bolt 420 so that the elastic bolt 420 is inserted into the first locking slot 4111. Then disassemble the gradient coil 11 and drag the gradient coil 11 into the first placement groove 310, as Figure 9The control rod 410 is rotated again to make the elastic pin 420 pop out of the first locking groove 4111, and then the support body 300 is pushed. When the limit block 240 abuts against the second stop block 232, the second placement groove 320 is aligned with the center of the scanning cavity, as shown in Figure 10 As shown. At this time, the control rod 410 is rotated and the elastic pin 420 is pressed so that the elastic pin 420 is inserted into the third locking groove 4113. Then, the gradient coil 11 to be installed can be slowly sent into the magnet aperture by the roller on the support body 300, as shown in Figure 11 As shown. That is, the gradient coil 11 is replaced.

[0091] In some embodiments, in combination with Figure 3 and Figure 4 , the gradient coil 11 replacement device also includes a height adjustment mechanism 500, which is arranged on the horizontal moving mechanism 200 and is fixedly connected to the support body 300. The height adjustment mechanism 500 is used to adjust the height of the support body 300.

[0092] Furthermore, the height adjustment mechanism 500 includes a first support plate 510, a second support plate 520 and an adjusting screw 530. The first support plate 510 is slidably connected to the guide rail 210. The second support plate 520 is detachably arranged above the first support plate 510, and the second support plate 520 is fixedly connected to the support body 300. The adjusting screw 530 is threadedly connected to the second support plate 520, and one end of the adjusting screw 530 passes through the second support plate 520 and abuts against the first support plate 510.

[0093] Specifically, the first support plate 510 can be detachably connected to the second support plate 520 by screws. When the height of the support body 300 needs to be adjusted, the screws connecting the first support plate 510 and the second support plate 520 are first loosened, and then the adjusting screw 530 is rotated to increase or decrease the distance between the first support plate 510 and the second support plate 520. Since the height of the first support plate 510 remains unchanged, that is, the height of the second support plate 520 increases or decreases, it is convenient to make the bottom of the placement slot (the first placement slot 310 or the second placement slot 320) consistent with the height of the scanning cavity of the nuclear magnetic resonance device, and the bottom of the placement slot is the same height as the bottom of the gradient coil 11, thereby facilitating the replacement of the gradient coil 11.

[0094] Of course, in other embodiments, the height of the support body 300 can also be adjusted by adjusting the height of the bracket assembly 100.

[0095] In some embodiments, in combination with Figure 7, a fixed baffle 610 is provided at one end of the support 300 along the second direction OY, and a sliding baffle 620 is provided at the other end along the second direction OY. The sliding baffle 620 can slide from the position of the first placement groove 310 to the position of the second placement groove 320.

[0096] In actual use, the sliding baffle 620 is arranged on the side close to the nuclear magnetic resonance device. When the gradient coil 11 to be installed is placed on the second placement groove 320, the sliding baffle 620 can be made to slide to the side of the gradient coil 11 to be installed to limit the gradient coil 11 to be installed. After the gradient coil 11 is disassembled, the sliding baffle 620 can be made to slide to the side of the first placement groove 310 to limit the gradient coil 11 to be disassembled.

[0097] Another embodiment of the present application also discloses a magnetic resonance imaging system, including a magnetic resonance imaging device and a gradient coil replacement device. The magnetic resonance imaging device includes a magnet 14, a gradient coil 11, and a scanning bed 12. The magnet 14 has a scanning cavity 13. The gradient coil 11 is detachably arranged in the scanning cavity 13. The scanning bed 12 is slidably connected to the magnet along the second direction and can slide into the scanning cavity 13. The bracket assembly 100 is used to cooperate with the scanning bed 12.

[0098] When the gradient coil 11 needs to be replaced, there is no need to disassemble the scanning bed 12, and the bracket assembly 100 can be directly cooperated with the scanning bed 12. The accurate positioning of the bracket assembly 100 can be achieved through the scanning bed 12, so that the first placement groove 310 or the second placement groove 320 is aligned with the scanning cavity 13, thereby facilitating the rapid replacement of the gradient coil 11.

[0099] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0100] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A gradient coil replacement device, characterized in that: The gradient coil replacement device comprises: A support assembly (100) for cooperating with a scanning bed (12) of a magnetic resonance imaging device; A horizontal movement mechanism (200) is arranged on the support assembly (100); and The support body (300) comprises a first placement groove (310) and a second placement groove (320) arranged along a first direction, wherein the first placement groove (310) and the second placement groove (320) extend along a second direction respectively, the first placement groove (310) is used for placing a gradient coil (11) to be disassembled, and the second placement groove (320) is used for placing a gradient coil (11) to be installed, and the support body (300) is movably arranged on the horizontal moving mechanism (200) along the first direction.

2. The gradient coil replacement device according to claim 1, characterized in that: The support assembly (100) comprises: an upper support (110), wherein the horizontal moving mechanism (200) is arranged on the upper support (110), A bottom bracket (120) is arranged relatively to the bottom of the upper bracket (110); a connecting bracket (130) disposed between the upper bracket (110) and the bottom bracket (120), and an end of the upper bracket (110) close to the scanning bed (12) extends out of the connecting bracket (130); and The caster (140) is arranged on the bottom bracket (120).

3. The gradient coil replacement device according to claim 2, characterized in that: The upper bracket (110) has a first end (111) and a second end (112) along the second direction, the distance between the connecting bracket (130) and the first end (111) is greater than the distance between the connecting bracket (130) and the second end (112), and the connecting bracket (130) is arranged to be inclined with the bottom bracket (120) and the upper bracket (110), respectively.

4. The gradient coil replacement device according to claim 1, characterized in that: The support assembly (100) comprises a first limiting member (150) and a second limiting member (160), wherein the first limiting member (150) is perpendicular to the second limiting member (160), the first limiting member (150) is used to cooperate with one side of the scanning bed (12) along a first direction, and the second limiting member (160) is used to cooperate with one side of the scanning bed (12) along the second direction.

5. The gradient coil replacement device according to claim 1, characterized in that: The horizontal moving mechanism (200) comprises: A guide rail (210) disposed on the support assembly (100) along a first direction; and The slider (220) is slidably connected to the guide rail (210), and the support body (300) is arranged on the slider (220).

6. The gradient coil replacement device according to claim 5, characterized in that: The horizontal movement mechanism (200) further comprises a limit block (240) and a stop block (230), wherein the limit block (240) is connected to the slider (220), and the stop block (230) is arranged on the bracket assembly (100) and is located on both sides of the limit block (240) along the first direction, and the distance between the two stop blocks (230) is equal to the distance between the central axis of the first placement groove (310) along the first direction and the central axis of the second placement groove (320) along the first direction.

7. The gradient coil replacement device according to claim 6, characterized in that: The gradient coil replacement device further comprises a locking mechanism (400), wherein the locking mechanism (400) cooperates with the limit block (240) and is used to lock the limit block (240).

8. The gradient coil replacement device according to claim 7, characterized in that: The locking mechanism (400) comprises a control rod (410) and an elastic latch (420); a locking groove (411) is provided on the control rod (410); the elastic latch (420) is used to pass through the limit block (240) and cooperate with the locking groove (411); the control rod (410) is rotated to move the elastic latch (420) from inside the locking groove (411) to outside the locking groove (411).

9. The gradient coil replacement device according to claim 8, characterized in that: Two side walls of the locking groove (411) along the circumferential direction of the control rod (410) are connected to the side walls of the control rod (410) via arc surfaces.

10. The gradient coil replacement device according to claim 8, characterized in that: The control rod (410) extends along a first direction, and at least two locking grooves (411) are sequentially opened on the control rod (410) along the first direction, and the opening directions of two adjacent locking grooves (411) are opposite.

11. The gradient coil replacement device according to claim 1, characterized in that: The gradient coil replacement device further comprises a height adjustment mechanism (500), wherein the height adjustment mechanism (500) is arranged on the horizontal moving mechanism (200), and the height adjustment mechanism (500) is fixedly connected to the support body (300).

12. The gradient coil replacement device according to claim 11, characterized in that: The height adjustment mechanism (500) comprises: A first supporting plate (510) slidably connected to the horizontal moving mechanism (200); a second support plate (520), detachably disposed above the first support plate (510), the second support plate (520) being fixedly connected to the support body (300); and The adjusting screw (530) is threadedly connected to the second supporting plate (520), and one end of the adjusting screw (530) passes through the second supporting plate (520) and abuts against the first supporting plate (510).

13. The gradient coil replacement device according to claim 1, characterized in that: A fixed baffle (610) is provided at one end of the support body (300) along the second direction, and a sliding baffle (620) is provided at the other end along the second direction. The sliding baffle (620) can slide from the position of the first placement groove (310) to the position of the second placement groove (320).

14. The gradient coil replacement device according to claim 1, characterized in that: A plurality of rollers (340) arranged in sequence along the second direction are respectively arranged on the inner walls of the first placement groove (310) and the second placement groove (320).

15. The gradient coil replacement device according to claim 1, characterized in that: At least one pair of handles (330) is provided on both sides of the support body (300) along the first direction.

16. The gradient coil replacement device according to claim 2, characterized in that: The support assembly (100) further comprises a brake assembly, wherein the brake assembly is connected to the caster.

17. A magnetic resonance imaging system, characterized in that: The invention comprises a magnetic resonance imaging device and a gradient coil replacement device according to any one of claims 1 to 14, wherein the magnetic resonance imaging device comprises a magnet (14), a gradient coil (11) and a scanning bed (12), wherein the magnet (14) has a scanning cavity (13), the gradient coil (11) is detachably arranged in the scanning cavity (13), the scanning bed (12) is slidably connected to the magnet (14) along a second direction and can slide into the scanning cavity (13), and the support assembly (100) is used to cooperate with the scanning bed (12).

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