CN110200630B

CN110200630B - Coil support for magnetic resonance imaging and magnetic resonance imaging device

Info

Publication number: CN110200630B
Application number: CN201910440830.9A
Authority: CN
Inventors: 秦军军
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shanghai United Imaging Healthcare Co Ltd
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2023-06-23
Anticipated expiration: 2039-05-24
Also published as: CN110200630A

Abstract

The invention relates to a coil bracket for magnetic resonance imaging and magnetic resonance imaging equipment, which comprise a supporting framework, a tray for bearing a coil and a height adjusting device, wherein the height adjusting device comprises a transmission mechanism and a connecting assembly, the transmission mechanism is arranged on the supporting framework, the connecting assembly is respectively connected with the transmission mechanism and the tray, and the transmission mechanism is matched with the connecting assembly to adjust the height of the tray relative to the supporting framework. The coil bracket for magnetic resonance imaging comprises a supporting framework, a tray and a height adjusting device, wherein the tray is provided with a coil, and the height of the tray relative to the supporting framework can be adjusted through the height adjusting device so as to realize the positioning of the coil, thereby realizing that the coil is close to the part to be scanned of a patient as much as possible without deforming the scanning part.

Description

Coil support for magnetic resonance imaging and magnetic resonance imaging device

Technical Field

The invention relates to the technical field of medical equipment, in particular to a coil support for magnetic resonance imaging and magnetic resonance imaging equipment.

Background

The information provided by magnetic resonance imaging (MRI, magnetic Resonance Imaging) is far more than other imaging techniques in medical imaging, and has obvious advantages for disease diagnosis, such as application to magnetic resonance radiotherapy. Magnetic resonance radiotherapy is magnetic resonance image-guided radiation therapy. Radiation therapy has entered the era of accurate radiotherapy, and there is an increasing demand for analog positioning of radiotherapy, particularly under magnetic resonance. The radiotherapy needs to precisely locate the position of the tumor, and in the magnetic resonance imaging process, the tumor is offset in the relative position of the human body due to the contact of the coil and the human body, the movement of the human body in the coil and the like, and the precise location of the tumor is greatly influenced, so that the coil needs to be pressed close to the scanning part of the patient as much as possible and does not deform the scanning part, and the traditional coil bracket for the magnetic resonance imaging has a simple structure and is difficult to realize the target.

Disclosure of Invention

Based on the above, it is necessary to provide a coil support for magnetic resonance radiotherapy and a magnetic resonance imaging apparatus, aiming at the problem that the coil is difficult to be brought close to the scanning position of a patient and the scanning position is not deformed by the conventional coil support for magnetic resonance imaging.

The utility model provides a coil support for magnetic resonance imaging, includes braced frame, is used for bearing the tray of coil and high adjusting device, high adjusting device includes drive mechanism and coupling assembling, drive mechanism set up in on the braced frame, coupling assembling respectively with drive mechanism with the tray is connected, drive mechanism cooperates coupling assembling is used for adjusting the tray for braced frame's height.

The coil bracket for magnetic resonance imaging comprises a supporting framework, a tray and a height adjusting device, wherein the tray is provided with a coil, and the height of the tray relative to the supporting framework can be adjusted through the height adjusting device so as to realize the positioning of the coil, thereby realizing that the coil is close to the part to be scanned of a patient as much as possible without deforming the scanning part.

In one embodiment, the support frame comprises arches at both ends in a longitudinal direction, the longitudinal direction being a height direction of the patient, the arches being respectively provided with the height adjusting means for adjusting the heights of the opposite ends of the tray in the longitudinal direction, respectively.

In one embodiment, the transmission mechanism is a gear transmission mechanism and comprises a rotating shaft, a gear and a rack, wherein the gear is fixed on the rotating shaft, the rack is meshed with the gear, and the rotating shaft is used for driving the gear to rotate so as to enable the rack to move.

In one embodiment, one end of the rotating shaft is provided with an adjusting knob for operation by a user.

In one embodiment, the height adjusting device further comprises a gear box and a bearing, the gear box is arranged on the arch frame, the bearing, the rotating shaft and the gear are arranged in the gear box, the bearing is used for being matched with the rotation of the rotating shaft in the gear box, and holes for the racks to pass through are formed in two opposite ends of the gear box.

In one embodiment, the height adjustment device further comprises a locking mechanism disposed within the gear box, the locking mechanism comprising a headblock and a locking assembly, the rotatable shaft being secured to the headblock, the locking assembly and the headblock cooperating to provide a restraining force such that the rotatable shaft is held stationary.

In one embodiment, the locking assembly includes a telescoping pin, an adjustment post, and an elastic member positioned between the telescoping pin and the adjustment post for adjusting the amount of restraining force by controlling the amount of compression of the elastic member.

In one embodiment, a threaded hole is formed in the gear box, and external threads matched with the threaded hole of the gear box are formed on the surface of the adjusting column.

In one embodiment, the arch is provided with a chute in which the rack moves.

In one embodiment, the rack comprises a first rack and a second rack, the connecting assembly comprises a first connecting assembly and a second connecting assembly, one end of the first connecting assembly is connected with the first rack, one end of the second connecting assembly is connected with the second rack, the other end of the first connecting assembly and the other end of the second connecting assembly are respectively connected with two ends of the tray in the transverse direction, and the transverse direction is a direction perpendicular to the longitudinal direction.

In one embodiment, the first rack and the second rack are respectively disposed at opposite ends of the gear so that the first rack and the second rack move in different directions.

In one embodiment, the height adjusting device further comprises a rotating mechanism and a cross beam, one side of the cross beam is movably connected with the connecting component, the other side of the cross beam is connected with the rotating mechanism, the rotating mechanism is further movably connected with the tray, the rotating mechanism is used for adjusting the inclination angle of the tray in the longitudinal direction, and the longitudinal direction is the height direction of a patient.

In one embodiment, the rotating mechanism comprises a hinge, a first pin shaft and a first locking member, one end of the hinge is connected with the cross beam, the other end of the hinge is movably connected with the first pin shaft, and the first locking member is used for fixing the first pin shaft and the tray.

In one embodiment, the tray comprises a tray frame, a width adjusting device, and a first hook frame and a second hook frame at two ends of the tray frame, wherein the first hook frame and the second hook frame are used for fixing the coil, and the width adjusting device is respectively arranged between the first hook frame and the tray frame and between the second hook frame and the tray frame and is used for adjusting the inclination angles of the first hook frame and the second hook frame relative to the tray frame.

In one embodiment, the width adjusting device includes a bar and a second locking member, and the first hook frame and the second hook frame rotate around the corresponding bar to adjust an inclination angle relative to the tray frame, and fix an angle thereof by the second locking member.

In one embodiment, the transmission mechanism is a sprocket transmission mechanism and comprises a rotating shaft, a sprocket and a chain, wherein the sprocket is fixed on the rotating shaft, the chain is meshed with the sprocket, and the rotating shaft is used for driving the sprocket to rotate so as to enable the chain to move.

In one embodiment, the transmission mechanism is a belt pulley transmission mechanism and comprises a rotating shaft, a belt pulley and a belt, wherein the belt pulley is fixed on the rotating shaft, the belt is arranged on the belt pulley, and the rotating shaft is used for driving the belt pulley to rotate so as to enable the belt to move.

A magnetic resonance imaging apparatus comprising a scanner, a coil and a patient bed coupled to the scanner, characterized in that it further comprises a coil support for magnetic resonance imaging, the coil being mounted on the coil support, the coil support being arranged on the patient bed, the scanner having a cavity, and the patient bed being movable into and out of the cavity.

Drawings

Fig. 1 is a perspective view of a coil support for magnetic resonance imaging in one embodiment, as seen from one direction, carrying a coil.

Figure 2 is a perspective view of the embodiment of figure 1 from another direction of a coil support for magnetic resonance imaging carrying coils.

Figure 3 is a top view of a coil support for magnetic resonance imaging in one embodiment carrying coils.

Figure 4 is a left side view of the embodiment of figure 3 with a coil support for magnetic resonance imaging carrying coils.

Fig. 5 is a top view of the positional relationship between a coil support for magnetic resonance imaging and a couch, patient in an embodiment.

Fig. 6 is a front view of the positional relationship between the coil support for magnetic resonance imaging and the couch, patient in the embodiment of fig. 5.

Fig. 7 is a front view of a positional relationship between a coil support for magnetic resonance imaging and a couch, patient in another embodiment.

Figure 8 is a left side view of a coil support for magnetic resonance imaging in one embodiment.

Figure 9 is a front view of a coil support for magnetic resonance imaging in one embodiment.

Figure 10 is a top view of a coil support for magnetic resonance imaging in one embodiment.

Fig. 11 is a top view of a transmission mechanism in an embodiment.

FIG. 12 is a schematic view of the interior of a gearbox in an embodiment.

Fig. 13 is a cross-sectional view of the transmission in the embodiment of fig. 11 taken along direction AA.

Fig. 14 is a cross-sectional view along BB of the transmission mechanism in the embodiment of fig. 11.

Fig. 15 is a cross-sectional view of a locking mechanism in one embodiment.

Figure 16 is a simplified top view of a coil support for magnetic resonance imaging in one embodiment.

Fig. 17 is a sectional view of the coil support in the embodiment of fig. 16 in the CC direction.

Fig. 18 is a top view of a tray in an embodiment.

Fig. 19 is a left side view of the tray in the embodiment of fig. 18.

Fig. 20 is a cross-sectional view of the left side view of the tray in the embodiment of fig. 18.

Fig. 21 is an enlarged view of region I in the embodiment of fig. 20.

Fig. 22 is a schematic view of the embodiment of fig. 20 in which the receiving space of the tray is wide.

Fig. 23 is a schematic view of the embodiment of fig. 20 in which the receiving space of the tray is narrow.

Fig. 24 is an enlarged view of region II in the embodiment of fig. 20.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

In the description of the present application, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements 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 application. Furthermore, it will be understood that when an element is referred to as being "formed on" another element, it can be directly connected to 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. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present.

The magnetic resonance imaging (MRI, magnetic Resonance Imaging) technique, which can directly make volume layer images of cross-section, sagittal, coronal and various oblique planes, has become one of the important tools for medical clinical diagnosis and research, especially for the localization of tumors in patients during radiotherapy. The MRI system excites human tissues by emitting electromagnetic waves through the radio frequency coil, resonance signals are generated in the human body group and received by the receiving coil, wherein, the coils can be used as the emitting coil and the receiving coil and then sent into the computer system for presentation, therefore, the radio frequency coil (hereinafter referred to as coil) is an important element of the imaging system, the positioning of the coil plays a role in the imaging quality, and the signal to noise ratio of images is directly influenced. The application provides a coil support for magnetic resonance imaging, which is used for realizing the fixation of a coil relative to a scanning position of a patient, so that the coil can be as close to the scanning position of the patient as possible and can not cause the deformation of the scanning position, thereby obtaining a more accurate magnetic resonance image of the scanning position of the patient.

For clarity and brevity in describing the structure of the coil support of the present application, in the following description of the embodiments, the height direction of the patient is taken as the longitudinal direction, and the direction perpendicular to the height direction is taken as the transverse direction.

In one embodiment, referring to fig. 1 to 4, a coil support (hereinafter, referred to as a coil support) 10 for magnetic resonance imaging includes a support frame 20, a tray 30, and a height adjusting device 40. Wherein the supporting frame 20 includes arches 210 at opposite ends in the longitudinal direction and connecting frames 220 at opposite ends in the transverse direction, which form a receiving space. Referring to fig. 5, the patient is laid on the couch board, the support frame 20 is supported on the couch board or fixed on the couch board, so that the support frame 20 serves as a support structure of the whole coil support 10, and the portion to be scanned of the patient is located in the accommodation space formed by the support frame 20. The tray 30 is located between the patient and the support frame 20, and the coil 90 is carried thereon, that is, the tray 30, the coil 90 carried on the tray 30, and the patient are all located in the accommodating space formed by the support frame 20. The height adjusting device 40 is used for suspending the tray 30 below the supporting framework 20 and adjusting the distance between the coil 90 carried on the tray 30 and the part of the patient to be scanned, i.e. positioning the coil 90.

In the present embodiment, the arches 210 of the supporting frame 20 are respectively provided with height adjusting means 40 for respectively adjusting the heights of the opposite ends of the tray 30 with respect to the supporting frame 20 in the longitudinal direction. The number of coils 90 carried on the tray 30 may be one or more, and when only one coil 90 is carried on the tray, the height adjusting device 40 on the gantry 210 is used for adjusting the distance between two opposite ends of the coil 90 in the longitudinal direction and the portion to be scanned of the patient, and when a plurality of coils 90 are distributed in the longitudinal direction, the height adjusting device 40 on the gantry 210 is used for adjusting the distance between different coils 90 and the portion to be scanned of the patient. The height adjusting device 40 on the arch 210 can adjust the heights of the opposite ends of the tray 30 in the longitudinal direction to be the same, and can also adjust the heights of the opposite ends of the tray 30 in the longitudinal direction to be different, and the height positions of the two ends of the tray 30 in the longitudinal direction depend on the scanning position of the patient. For example, referring to fig. 6, when the scanning site is a thoracic cavity and the heights of the scanning sites in the longitudinal direction thereof are uniform, the height adjusting devices 40 on the arch 210 respectively adjust the heights of the opposite ends of the tray 30 in the longitudinal direction to be the same. For another example, referring to fig. 7, when the scan site is a thigh of a patient, the heights thereof in the longitudinal direction are not uniform, the height adjusting devices 40 on the arch 210 respectively adjust the heights of the opposite ends of the tray 30 in the longitudinal direction, i.e., the height adjusting devices 40 can respectively adjust the heights of the opposite ends of the tray 30 in the longitudinal direction to accommodate the height variation of the scan site in the longitudinal direction.

When the coil bracket 10 is used for positioning the coil 90, the supporting framework 20 is fixed relative to the bed board, and the height of the two opposite ends of the tray 30 in the longitudinal direction can be different by adjusting the height adjusting device 40, so that the heights of the coil 90 borne on the tray 30 in the longitudinal direction are different to match the positions of the thighs of a patient, the lower abdomen of a pregnant woman and the parts with obvious height differences, the coil 90 is more close to the position to be scanned of the patient, the scanned position is not deformed, the signal-to-noise ratio of the formed magnetic resonance image is higher, and the medical diagnosis such as magnetic resonance radiotherapy and the like which need to accurately position the tumor position is particularly facilitated. In the present embodiment, the type of the coil 90 carried on the tray 30 is not particularly limited, and the coil 90 may be a head coil, a body coil, a lower limb coil, or the like, or may be a combination of these coil types.

In this embodiment, referring to fig. 8-10, the height adjustment device 40 includes a transmission mechanism 410 and a connection assembly 420. The transmission mechanism 410 is disposed on the arch 210 of the support frame 20. The link assembly 420 is connected to the transmission mechanism 410 and the tray 30, respectively, and the link assembly 420 is engaged with the transmission mechanism 410 for adjusting the height of the tray 30 in the longitudinal direction with respect to the support frame 20. The heights of the two opposite ends of the tray 30 in the longitudinal direction relative to the supporting frame 20 can be respectively adjusted by matching the transmission mechanisms 410 on the two opposite sides of the supporting frame 20 in the longitudinal direction with the connecting assemblies 420.

In the first embodiment, the transmission mechanism 410 is a gear transmission mechanism. Referring to fig. 11 to 14, the gear transmission mechanism includes a rotation shaft 411, a gear 412, and a rack 414, and a slider (not shown) is further provided at the end of the rack 414. In this embodiment, the height adjustment device 40 further includes a gear box 415 and a bearing 416. The gear case 415 is disposed on the gantry 210, and the bearing 416, the rotation shaft 411, and the gear 412 are disposed in the gear case 415. The gear case 415 has protection effects of water resistance, dust resistance and the like on the components arranged therein, prevents the components from being exposed outside, and is more attractive. The bearing 416 is used for cooperating with the rotation of the rotation shaft 411 in the gear box 415, the gear 412 is fixed on the rotation shaft 411, the rack 414 is meshed with the gear 412, and when the rotation shaft 411 rotates, the gear 412 can be driven to rotate so as to enable the rack 414 to move. The gear 412 and the rotating shaft 411 may be in an integral non-detachable structure, and the gear 412 and the rotating shaft 411 may be fixed by fastening members such as a clamp spring, a fastening screw, a bayonet lock, a key, or an interference fit. In this embodiment, referring to fig. 8, holes (not shown) through which the racks 414 pass are further formed at opposite ends of the gear case 415, the arch 210 is provided with a chute 212 that accommodates the racks 414, the portion of the racks 414 that passes through the gear case 415 is located in the chute 212 of the arch 210, the racks 414 drive the slider to move in the chute 212, the slider is connected to the connection assembly 420, and the movement of the racks 414 drives the movement of the connection assembly 420, so as to adjust the height of the tray 30 relative to the support frame 20.

In this embodiment, referring to fig. 1 and 11, an adjusting knob 417 for user operation is further provided at one end of the rotation shaft 411, the adjusting knob 417 is disposed outside the gear case 415, the user only needs to rotate the adjusting knob 417 at two ends in the longitudinal direction, so that the user can respectively realize the up-down or up-down of two opposite ends of the tray 30 in the longitudinal direction, and the user only needs to rotate the adjusting knob 417 with one hand, so that the operation is simpler and more convenient. In other embodiments, a slip-resistant pattern may be provided at one end of the rotation shaft 411 instead of the adjustment knob 417.

In this embodiment, referring to fig. 14 and 15, the height adjustment device 40 further includes a locking mechanism 430 disposed within the gearbox 415. Locking mechanism 430 includes headblock 432 and locking assembly 434. The rotating shaft 411 is fixed with the brake wheel 432, and when the rotating shaft 411 rotates, the brake wheel 432 also rotates; when the brake wheel 432 stops rotating, the rotation shaft 411 also stops rotating. The brake wheel 432 may be integrally designed with the rotary shaft 411, may be fixed by a fastening screw 436, and may be fixed by a fastening member such as a clip spring, a bayonet lock, a key, etc. The locking assembly 434 and the headblock 432 cooperate to provide a restraining force that keeps the rotating shaft 411 stationary, thereby keeping the rotating shaft 411 stationary with a tendency to stop rotating. When the user does not directly or indirectly apply a force to rotate the rotation shaft 411 and the restraining force to keep the rotation shaft 411 stationary is sufficiently large, the rotation of the rotation shaft 411 is stopped, the rotation of the gear 412 is stopped, and the movement of the rack 414 is stopped, thereby achieving the fixation of the height of the tray 30 with respect to the support frame 20, avoiding the lowering of the position of the tray 30 due to gravity. Specifically, when the adjusting knob 417 is rotated, the height of the tray 30 is adjusted by the driving mechanism 410 in cooperation with the movement of the connection assembly 420, and after the adjusting knob 417 stops rotating, the locking mechanism 430 performs self-locking on the driving mechanism 410, so that the height of the tray 30 is fixed.

In this embodiment, referring to fig. 15, the locking assembly 434 includes a telescoping pin 4342, an adjustment post 4346, and a resilient member 4344 positioned between the telescoping pin 4342 and the adjustment post 4346. The adjustment column 4346 is used to adjust the magnitude of the restraining force such that the rotation shaft 411 is held stationary by controlling the compression amount of the elastic member 4344. Optionally, the teeth of the braking wheel 432 that cooperate with the telescopic pin 4342 are arc-shaped, which on the one hand enables to lock the rotation shaft 411 in a stable state, and on the other hand does not hinder the normal rotation of the rotation shaft 411 under the action of the adjustment knob 417. In other embodiments, the teeth of headblock 432 may be straight teeth, helical teeth, or the like. In this embodiment, the elastic member 4344 is a spring. When the adjustment column 4346 makes the compression amount of the spring smaller, the restraining force holding the rotation shaft 411 stationary is also smaller, and when the adjustment column 4346 makes the compression amount of the spring larger, the restraining force holding the rotation shaft 411 stationary is also larger. If the compression amount of the spring is too small, the restraining force is too small to achieve the self-locking purpose, and if the compression amount of the spring is too large, the restraining force is too large to make the rotation shaft 411 difficult to rotate, and thus it is difficult to adjust the height of the tray 30, so the adjustment of the compression degree of the spring by the adjustment column 4346 is set according to the specific situation, for example, taking into consideration the stiffness coefficient of the spring, the friction coefficient between the telescopic pin 4342 and the brake wheel 432, and the like.

In the present embodiment, the gear case 415 includes an upper cover 415a and a lower cover 415b. The lower cap 415b has a threaded bore 419 therein and the outer surface of the adjustment post 4346 has external threads that mate with the threaded bore 419. The degree of compression of the spring is adjusted by adjusting the height of the adjustment post 4346 within the threaded bore 419 by the engagement of the external threads of the adjustment post 4346 with the threaded bore 419. In other embodiments, the locking assembly 434 also includes a spacer (not shown). Shims are disposed under the adjustment posts 4346, and shims of different heights are used to adjust the height of the adjustment posts 4346, thereby adjusting the degree of compression of the adjustment springs.

In this embodiment, referring to fig. 8, the connection assembly 420 includes a connecting rod 422 and protruding shafts 424 disposed at two ends of the connecting rod 422, and two ends of the connecting rod 422 are movably connected with the slider and the tray 30 through corresponding protruding shafts 424, respectively. Both ends of the link 422 are respectively rotated about corresponding bosses 424 during the height adjustment of the tray 30 to accommodate the angular variation of both ends of the link 422 with respect to the slider and the tray 30, respectively, during the height adjustment of the tray 30. The boss 424 may be formed integrally with the link 422, or may be fixed to the link 422 by a fastener such as a lock screw. In other embodiments, a flexible cable may be used in place of the link 422 and the boss 424, with both ends of the flexible cable being adapted to accommodate changes in angle relative to the slider and the tray 30, respectively, during height adjustment of the tray 30.

In the present embodiment, referring to fig. 16 and 17, the rack 414 includes a first rack 414a and a second rack 414b, and the connection assembly 420 includes a first connection assembly 420a and a second connection assembly 420b. One end of the first connecting assembly 420a is connected with the slider at the end of the first rack 414 a. One end of the second connection assembly 420b is connected with the slider at the end of the second rack 414b, and the other end of the first connection assembly 420a and the other end of the second connection assembly 420b are respectively connected with both ends of the tray 30 in the lateral direction. Optionally, the two opposite ends of the tray 30 in the longitudinal direction are arc-shaped, which accords with the design of ergonomics, so that the tray 30 and the 90 carried thereon can be closer to the part to be scanned of the patient, and a more accurate magnetic resonance image of the scanned part can be obtained. That is, the other end of the first connection member 420a and the other end of the second connection member 420b are connected to both ends of one side of the tray 30 having an arc shape, respectively.

In this embodiment, referring to fig. 12, the first rack 414a and the second rack 414b are respectively disposed at opposite ends of the gear 412 so that the first rack 414a and the second rack 414b move in different directions, and the first rack 414a and the second rack 414b are meshed with the same gear 412, so that synchronous movement of the first rack 414a and the second rack 414b in different directions and at the same speed in the chute 212 is ensured.

Alternatively, the coil support 10 has a symmetrical structure as a whole, and the synchronous movement of the first and

second racks

414a and 414b stably and synchronously ascends or descends both ends of one side of the arc shape of the tray 30. During the simultaneous ascending or descending of the two ends of the arc-shaped side of the tray 30, i.e., the height adjustment of the arc-shaped side of the tray 30, the connecting rod 422 swings left and right along with the movement of the rack 414 in the plane of the arc-shaped side of the tray 30, and the first rack 414a and the second rack 414b move in different directions in the chute 212, so that the tightening of the first connection assembly 420a and the second connection assembly 420b is ensured to enhance the stability of the whole coil bracket 10.

In this embodiment, referring to fig. 17 and 19, the height adjustment device 40 further includes a cross member 440 and a rotation mechanism 450. One side of the beam 440 is movably connected with the connection assembly 420, and the other side of the beam 440 is connected with the rotation mechanism 450. The rotating mechanism 450 is also movably connected with the tray 30, the rotation mechanism 450 is used to adjust the inclination angle of the tray 30 in the longitudinal direction.

It will be appreciated that the connection assembly 420 is not directly connected to the tray 30, but is connected to the tray 30 via the beam 440 and the rotation mechanism 450. The cross beam 440 is used as a connecting medium, the first connecting component 420a and the second connecting component 420b are arranged at two ends of one side of the cross beam 440, along with the movement of the first rack 414a and the second rack 414b, the angle between the first connecting component 420a and the second connecting component 420b and the cross beam 440 is continuously changed, and the cross beam 440 is driven to ascend or descend, and the tray 30 ascends or descends along with the movement. However, when both ends of the tray 30 in the longitudinal direction are not moved synchronously, the angle between the tray 30 and the cross member 440 is always changed during the change in the height of the tray 30, and thus the rotation mechanism 450 is required to accommodate the change in the angle between the tray 30 and the cross member 440 in the longitudinal direction.

In this embodiment, referring to fig. 19 to 21, the rotation mechanism 450 includes a hinge 452, a first pin 454, and a first locking member 456. One end of the hinge 452 is connected with the beam 440, the other end of the hinge 452 is movably connected with the first pin 454, and the first locking member 456 is used for fixing the first pin 454 and the tray 30. The first locking member 456 may be a locking screw, a key, a bayonet, or the like. In the present embodiment, the tray 30 and the first pin 454, that is, the first pin 454 and the tray 30 are fixed by the first locking member 456 to be relatively stationary, so that axial movement of the first pin 454 is prevented. The hinge 452 is free to change angle in the longitudinal direction by the first pin 454 to accommodate the process of height adjustment of opposite ends of the tray 30 in the longitudinal direction.

In the second embodiment, the transmission mechanism 410 is a sprocket transmission mechanism including a rotation shaft, a sprocket, and a chain. The chain wheel is fixed on the rotating shaft, and the chain is meshed with the chain wheel. The rotation shaft is used to rotate the sprocket to move the chain, thereby moving the link assembly 420 to raise and lower the tray 30. Specifically, the sprocket includes the first sprocket and the second sprocket of setting at chain both ends, and the velocity of movement of first sprocket and second sprocket is the same in order to guarantee the normal motion of chain. The first connection assembly 420a is connected with the upper end of the chain, and the second connection assembly 420b is connected with the lower end of the chain to achieve synchronous ascent or synchronous descent of both ends of the tray 30.

In a third embodiment, the transmission mechanism 410 is a pulley transmission mechanism including a rotation shaft, a pulley, and a belt. The belt pulley is fixed on the rotating shaft, and the belt is arranged in the belt groove of the belt pulley. The rotation shaft is used to rotate the pulley to move the belt, thereby moving the connection assembly 420 to raise and lower the tray 50. The transmission manner of the pulley transmission mechanism is similar to that of the sprocket transmission mechanism in the second embodiment, and will not be described here.

In an embodiment, referring to fig. 18 to 20, the tray 30 includes a tray frame 310, first and second hook frames 320 and 330 at both ends of the tray frame 310, and a width adjustment device 340. The first hanger 320, the tray 310 and the second hanger 330 enclose an accommodating space for accommodating a patient. The rotating mechanism 450 in the above embodiment is connected to the tray frame 310. The first hook frame 320 and the second hook frame 330 are used for fixing the coil 90, and the width adjusting device 340 is respectively arranged between the first hook frame 320 and the tray frame 310 and between the second hook frame 330 and the tray frame 310, and is used for adjusting the inclination angles of the first hook frame 320 and the second hook frame 330 relative to the tray frame 310 in the transverse direction. The width of the accommodating space formed by surrounding the first and second hook frames 320 and 330 can be adjusted by adjusting the inclination angle between them with respect to the tray frame 310, for example, see fig. 22, the chest of the patient is wide, the width of the accommodating space should be enlarged, see fig. 23, the both sides of the legs of the patient are narrow, and the width of the accommodating space should be reduced. In the adjusting process, the opposite ends of the coil 90 in the transverse direction are deformed along with the movement of the first hook frame 320 and the second hook frame 330 to be more fit to the body of the patient, so that the positioning of the coil 90 in the width direction is realized, that is, the coil bracket 10 can realize the adjustment of the height of the coil 90 in the longitudinal direction and the adjustment of the width in the transverse direction.

In the present embodiment, referring to fig. 18 to 20 and 24, the width adjustment device 340 includes a bar 342 and a second locking member 344. The first hook frame 320 and the second hook frame 330 rotate around the corresponding bar 342 to adjust the inclination angle relative to the tray frame 310, and fix the angles thereof through the second locking member 344, so as to realize the width change of the accommodating space formed by the surrounding of the first hook frame 320, the tray frame 310 and the second hook frame 330 to adapt to the width of the scanning part. The inclination angles of the first hook frame 320 and the second hook frame 330 with respect to the tray frame 310 may be the same or different. The bar 342 and the second locking member 344 may be locked by a screw, for example, the bar 342 may be provided with an external screw at its end, the second locking member 344 may be provided with a screw hole matching the external screw, or the bar 342 may be provided with a screw hole at its end, and the second locking member 344 may be provided with an external screw matching the screw hole. The first hook frame 320 and the second hook frame 330 can be adjusted relative to the tray frame 310 by adjusting the width adjusting device 340 to adapt to the width change of the scanning part of the patient, and only the second locking member 344 needs to be adjusted in the adjusting process, so that the operation is convenient and simple.

The present application also provides a magnetic resonance imaging apparatus comprising a magnetic resonance scanner, a coil, and a patient bed coupled to the scanner, further comprising a coil support 10 of any of the embodiments described above, the coil 90 being mounted on the coil support 10, the coil support 10 being disposed on the patient bed, the scanner having a cavity, and the patient bed being movable into and out of the cavity. When a patient is required to be scanned, a medical staff uses the coil support 10 to position the coil 90 so as to attach the coil 90 to the patient to be scanned as much as possible without causing deformation of the scanning part, and then acquires a magnetic resonance image of the patient to be scanned by using a magnetic resonance imaging device. In some embodiments, the magnetic resonance imaging apparatus may be an MRT apparatus formed by magnetic resonance imaging and radiotherapy imaging apparatus.

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

1. The coil bracket for magnetic resonance imaging is characterized by comprising a supporting framework, a tray for bearing a coil and a height adjusting device, wherein the height adjusting device comprises a transmission mechanism and a connecting assembly, the transmission mechanism is arranged on the supporting framework, the connecting assembly is respectively connected with the transmission mechanism and the tray, and the transmission mechanism is matched with the connecting assembly to adjust the height of the tray relative to the supporting framework;

the supporting framework comprises arched frames at two ends in the longitudinal direction, the longitudinal direction is the height direction of a patient, the arched frames are respectively provided with the height adjusting devices and are respectively used for adjusting the heights of the two opposite ends of the tray in the longitudinal direction;

the height adjusting device further comprises a rotating mechanism and a cross beam, one side of the cross beam is movably connected with the connecting assembly, the other side of the cross beam is connected with the rotating mechanism, the rotating mechanism is further movably connected with the tray, and the rotating mechanism is used for adjusting the inclination angle of the tray in the longitudinal direction.

2. The coil support for magnetic resonance imaging according to claim 1, wherein the rotation mechanism comprises a hinge, a first pin, and a first locking member; one end of the hinge is connected with the cross beam, the other end of the hinge is movably connected with the first pin shaft, and the first locking piece is used for fixing the first pin shaft and the tray.

3. The coil support for magnetic resonance imaging according to claim 1, wherein the transmission mechanism is a gear transmission mechanism comprising a rotation shaft, a gear and a rack, the gear being fixed to the rotation shaft, the rack being engaged with the gear, the rotation shaft being for rotating the gear to move the rack.

4. A coil support for magnetic resonance imaging according to claim 3, wherein the height adjustment means further comprises a gear box and a bearing, the gear box being provided on the gantry, the bearing, the rotation shaft and the gear being provided in the gear box, the bearing being for cooperating rotation of the rotation shaft in the gear box, opposite ends of the gear box being provided with holes for the racks to pass through.

5. The coil support for magnetic resonance imaging according to claim 4, wherein an end of the rotation shaft outside the gear box is provided with an adjusting knob for achieving lifting of the tray in the longitudinal direction.

6. The coil support for magnetic resonance imaging according to claim 4, wherein the height adjustment device further comprises a locking mechanism disposed within the gearbox, the locking mechanism comprising a brake wheel and a locking assembly, the rotating shaft being secured to the brake wheel, the locking assembly and the brake wheel cooperating to provide a restraining force such that the rotating shaft is held stationary.

7. A coil support for magnetic resonance imaging according to claim 3, wherein the racks comprise a first rack and a second rack, the first rack and the second rack being disposed at opposite ends of the gear, respectively, so that the first rack and the second rack move in different directions, the connection assembly comprising a first connection assembly and a second connection assembly, one end of the first connection assembly being connected with the first rack, one end of the second connection assembly being connected with the second rack, the other end of the first connection assembly and the other end of the second connection assembly being connected with both ends of the tray in a lateral direction, respectively, the lateral direction being a direction perpendicular to the longitudinal direction.

8. The coil support for magnetic resonance imaging according to claim 1, wherein the tray comprises a tray frame, a width adjusting device, and first and second hook frames at both ends of the tray frame, the first and second hook frames being used for fixing the coil, the width adjusting device being provided between the first and second hook frames and between the second hook frame and the tray frame, respectively, for adjusting inclination angles of the first and second hook frames with respect to the tray frame, respectively.

9. The coil support for magnetic resonance imaging according to claim 1, wherein the transmission mechanism is a sprocket transmission mechanism comprising a rotation shaft, a sprocket and a chain, the sprocket being fixed to the rotation shaft, the chain being engaged with the sprocket, the rotation shaft being for driving the sprocket to rotate to move the chain; or alternatively, the process may be performed,

the transmission mechanism is a belt pulley transmission mechanism and comprises a rotating shaft, a belt pulley and a belt, wherein the belt pulley is fixed on the rotating shaft, the belt is arranged on the belt pulley, and the rotating shaft is used for driving the belt pulley to rotate so as to enable the belt to move.

10. A magnetic resonance imaging apparatus comprising a scanner, a coil and a patient bed coupled to the scanner, further comprising a coil support for magnetic resonance imaging as claimed in any one of claims 1 to 9, the coil being mounted on the coil support, the coil support being arranged on the patient bed, the scanner having a cavity, and the patient bed being movable into and out of the cavity.