A body position fixing device for tree shrew CT or MRI examination

Abstract

The present invention discloses a body position fixing device for CT or MRI examination of tree shrews, mainly related to the field of tree shrew imaging examination. It includes an arc surface fixing plate, a limb position fixing device, a head position fixing device, and a remote control secondary anesthesia device; the limb position fixing device includes a first soft bottom plate detachably connected to the top surface of the arc surface fixing plate and a retractable cable tie structure; the head position fixing device includes a second soft bottom plate detachably connected to the top surface of the arc surface fixing plate, a retractable cable tie structure, and a head cover; the remote control secondary anesthesia device includes a micro push rod motor, a slide plate, a remote control motor, a threaded transmission mechanism, a needle seat and a syringe. The beneficial effect of the present invention is that it can conveniently and comfortably fix the body position of the anesthetized tree shrew, is suitable for tree shrews of various sizes, and is convenient for body position adjustment during the examination process; in addition, when the tree shrew suddenly wakes up during the examination process, the tree shrew can be remotely controlled to perform timely and convenient secondary anesthesia.

Description

Technical Field

[0001] The invention relates to the field of tree shrew imaging examination, in particular to a body position fixing device for tree shrew CT or MRI examination. Background Art

[0002] The tree shrew is a small mammal belonging to the order Shrews, which is closely related to the order Primates. In the past, it was considered a lower primate, so it was used as an experimental animal in biomedical research. In recent years, the tree shrew has provided many valuable results for humans in the research of immunity, metabolism, tumors, and viral infections, and is a very promising experimental animal.

[0003] Imaging (CT, MRI) can non-invasively obtain the physiological and pathological changes in the body of the object being examined; it is a common means of observing experimental animals. In the study of disease models, it is usually necessary to perform multiple CT or MRI examinations on the model animals in order to obtain the evolution of the disease throughout the course of the disease. Whether it is a comparison of experimental animals themselves or a comparison between animals, if a consistent posture can be maintained during CT or MRI shooting, it will greatly increase the comparability of the results and improve the reliability of the imaging data; otherwise, it will cause misalignment of the CT or MRI image levels, increase the difficulty of reading the film, and reduce the accuracy of the results.

[0004] However, tree shrews are a new type of experimental animal, and there is currently no relevant device that can fix the posture of tree shrews. In addition, there has been no systematic research on the responsiveness of tree shrews to anesthetic drugs, the effective time of anesthesia, and the awakening time. During long-term scanning and shooting, awakening movements are inevitable, making the image artifacts impossible to read. During the re-examination, secondary anesthesia not only affects the progress of the examination, but also makes it difficult to keep the body position consistent with the previous one. In summary, during the CT or MRI examination of tree shrews, a dedicated body position fixation device is urgently needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a body position fixing device for tree shrew CT or MRI examination, which can conveniently and comfortably fix the body position of anesthetized tree shrews, is suitable for tree shrews of various sizes, and is convenient for body position adjustment during the examination process; in addition, when the tree shrew suddenly wakes up during the examination process, the tree shrew can be remotely controlled to perform a timely and convenient secondary anesthesia.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A body position fixing device for tree shrew CT or MRI examination, comprising a curved surface fixing plate, a limb position fixing device, and a head position fixing device;

[0008] Curved fixed plate:

[0009] The curved fixing plate is provided with a side plate, and the side plate is provided with an inclined plate; the limb position fixing device and the head position fixing device are detachably fixed on the curved fixing plate;

[0010] Limb position fixation device:

[0011] The limb position fixing device comprises a first soft bottom plate detachably connected to the top surface of the curved fixing plate and a retractable tie structure;

[0012] The first soft bottom plate is detachably fixed on the curved fixed plate, the retractable cable tie structure comprises a separate cable tie body and a retractable cable tie buckle, one end of the cable tie body is fixed to the first soft bottom plate, the retractable cable tie buckle is arranged at the other end of the first soft bottom plate, and the other end of the cable tie body is inserted into the buckle hole of the retractable cable tie buckle to achieve cooperation with the retractable cable tie buckle;

[0013] Head position fixation device:

[0014] The head position fixing device includes a second soft bottom plate detachably connected to the top surface of the arc-surface fixing plate, a retractable tie structure, and a head cover; the second soft bottom plate is detachably fixed to the arc-surface fixing plate, the front end of the head cover is provided with a ventilation hole, the rear end of the head cover is provided with an elastic cloth, the elastic cloth is provided with an elastic band, and the setting positions of the elastic cloth and the elastic band correspond to the neck position of the tree shrew; one end of the tie body of the retractable tie structure is fixed to the elastic band, and the retractable tie buckle of the retractable tie structure is set on the second soft bottom plate.

[0015] A connecting frame is provided on one side of the arc surface fixing plate, and a connecting shaft end is provided on the connecting frame.

[0016] The arc surface fixing plate is provided with a plurality of positioning holes; the bottom of the first soft bottom plate and the second soft bottom plate is provided with pushable and deformable buckles which are detachably connected to the positioning holes.

[0017] The top surface of the arc-surface fixing plate is a smooth top surface, and suction cups are arranged at the bottoms of the first soft bottom plate and the second soft bottom plate.

[0018] The device also includes a remote-controlled secondary anesthesia device;

[0019] Remote control secondary anesthesia device:

[0020] The remote control secondary anesthesia device comprises a micro push rod motor, a slide plate, a remote control motor, a threaded transmission mechanism, a needle seat and a syringe; the micro push rod motor is arranged on the side plate of the curved fixed plate, and the slide plate is slidably connected to the inclined plate on the side plate; the plastic push rod of the micro push rod motor (19) corresponds to the lower end of the slide plate; the circuit of the micro push rod motor is controlled by a remote control switch; a vertical baffle is arranged at the lower end of the slide plate, and when the micro push rod motor is powered on, the plastic push rod pushes the vertical baffle to push the slide plate; the remote control motor is fixed to the top of the slide plate, and the top of the slide plate is also provided with a side bracket, and the upper limit rotation groove of the side bracket is; the threaded transmission mechanism comprises a transmission stud and a driven nut, The transmission stud is threadedly connected to the lower side wall of the driven nut, the transmission stud is connected to the main shaft of the remote control motor, sliding bars are provided on both sides of the driven nut, the sliding bars are slidably connected to the rotation limiting groove, a notch is provided on the side of the driven nut away from the remote control motor, the end of the stud is arranged in the notch, the needle seat is arranged on the top of the slide plate, and the needle seat is a soft rubber pad structure, an opening is provided on the top of the needle seat, the syringe barrel of the syringe is clamped on the needle seat through the opening, and an injection hole corresponding to the position of the needle is opened on one side of the arc fixing plate; the micro push rod motor and the remote control motor are both sealed by a shielding chassis shell, the shielding chassis shell is made of rare earth polymer-based composite material, and an electromagnetic shielding film is arranged on the inner surface of the shielding chassis shell.

[0021] A control box and a motor box are provided on the side plate of the arc surface fixing plate. Control elements such as a power supply and an integrated control circuit board are arranged in the control box. The micro push rod motor is arranged in the motor box.

[0022] A sliding block is arranged in the middle of the bottom of the sliding plate, a groove rail slidably connected to the sliding block is arranged on the inclined plate, a return spring is arranged at the rear end of the groove rail, and the return spring is connected to the sliding block.

[0023] The inclined panel is provided with a slide groove, and both sides of the bottom of the slide plate are provided with slide rails slidably connected with the slide groove.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The device can conveniently and comfortably fix the body position of the anesthetized tree shrew through the curved fixing plate, and the limbs fixing device and the head fixing device can be detachably fixed at any position on the curved fixing plate according to the body shape of the tree shrew, so that the device is suitable for tree shrews of various sizes. Moreover, the connecting shaft end is connected to the main shaft, and the curved fixing plate is rotated and adjusted to facilitate the body position adjustment during the inspection process. In addition, when the tree shrew suddenly wakes up during the inspection process, the secondary anesthesia device can be remotely controlled to perform timely and convenient secondary anesthesia on the tree shrew. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a state diagram of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the curved surface fixing plate in the present invention.

[0028] Figure 3 It is a top view of the limb position fixing device of the present invention.

[0029] Figure 4 It is a top view of the head position fixing device in the present invention.

[0030] Figure 5 It is a schematic diagram of the buckle structure that can be pressed and deformed in the present invention.

[0031] Figure 6 It is a structural schematic diagram of the suction cup arrangement method in the present invention.

[0032] Figure 7 It is a schematic structural diagram of the remote control secondary anesthesia device of the present invention.

[0033] Figure 8 It is a side view and a partial enlarged view of the remote-controlled secondary anesthesia device of the present invention.

[0034] Numbers shown in the accompanying drawings:

[0035] 1. Arc surface fixing plate; 2. Limb position fixing device; 3. Head position fixing device; 4. Side plate; 5. Inclined plate; 6. First soft bottom plate; 7. Tie body; 8. Retractable tie buckle; 9. Second soft bottom plate; 10. Head cover; 11. Breathable hole; 12. Elastic cloth; 13. Elastic band; 14. Connecting frame; 15. Connecting shaft end; 16. Positioning socket; 17. Buckle; 18. Suction cup; 19. Micro push rod motor; 20. Slide plate; 21. Remote control motor; 22. Needle holder; 23. Syringe; 24. Vertical baffle; 25. Side bracket; 26. Limiting groove; 27. Transmission stud; 28. Driven nut; 29. ​​Sliding rod; 30. Notch; 31. Opening; 32. Injection hole; 33. Control box; 34. Motor box; 35. Sliding block; 36. Groove rail; 37. Reset spring; 38. Slide groove; 39. Slide rail. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0037] The present invention discloses a body position fixing device for tree shrew CT or MRI examination, the main structure of which comprises an arc surface fixing plate 1, a limb position fixing device 2, a head position fixing device 3 and a remote control secondary anesthesia device.

[0038] Arc fixed plate 1:

[0039] The curved fixing plate 1 is a tempered glass plate, and a connecting frame 14 is provided on one side of the curved fixing plate 1, and a connecting shaft end 15 is provided on the connecting frame 14; a side plate 4 is provided on the other side of the curved fixing plate 1, and an inclined plate 5 is provided on the side plate 4. The limb position fixing device 2 and the head position fixing device 3 are detachably fixed on the curved fixing plate 1.

[0040] There are two embodiments for the curved fixing plate 1:

[0041] First, the arc surface fixing plate 1 is provided with a plurality of positioning holes 16. Correspondingly, the bottom of the limb position fixing device 2 and the head position fixing device 3 is provided with a push-to-deform buckle 17 which is detachably connected to the positioning holes 16. The structure is as follows: Figure 5 The buckle 17 is pressed and deformed and then passes through the positioning hole 16. Then, after the hand is released, the buckle 17 recovers and is stuck in the positioning hole 16, so that the limb position fixing device 2 and the head position fixing device 3 are fixed on the curved fixing plate 1.

[0042] Second, the top surface of the curved fixing plate 1 is a smooth top surface. Correspondingly, the bottom of the limb position fixing device 2 and the head position fixing device 3 is provided with a suction cup 18, and its structure is as follows: Figure 6 After the positions of the limbs position fixing device 2 and the head position fixing device 3 are determined, the suction cup 18 is adsorbed on the top surface of the curved fixing plate 1 for fixing.

[0043] Limb position fixing device 2:

[0044] The limb position fixing device 2 includes a first soft bottom plate 6 detachably connected to the top surface of the curved fixing plate 1 and a retractable tie structure. The first soft bottom plate 6 is detachably connected to the curved fixing plate 1 by two fixing implementation methods, namely, a buckle 17 that can be pressed and deformed or a suction cup 18. The retractable tie structure includes a separate tie body 7 and a retractable tie buckle 8. One end of the tie body 7 is fixed to the first soft bottom plate 6. The retractable tie buckle 8 is arranged at the other end of the first soft bottom plate 6. The other end of the tie body 7 is inserted into the buckle hole of the retractable tie buckle 8 to achieve cooperation with the retractable tie buckle 8. The limbs of the tree shrew are tightened and positioned by pulling the tie body 7.

[0045] Head position fixation device 3:

[0046] The head position fixing device 3 comprises a second soft bottom plate 9 detachably connected to the top surface of the curved fixing plate 1, a retractable tie structure, and a head cover 10. The second soft bottom plate 9 is detachably connected to the curved fixing plate 1 by two fixing implementation methods: a buckle 17 that can be pressed and deformed or a suction cup 18. A ventilation hole 11 is provided at the front end of the hood 10 to facilitate the tree shrew's breathing. An elastic cloth 12 is provided at the rear end of the hood 10, and an elastic band 13 is provided on the elastic cloth 12. The setting positions of the elastic cloth 12 and the elastic band 13 correspond to the neck position of the tree shrew. The retractable tie structure includes a separate tie body 7 and a retractable tie buckle 8. One end of the tie body 7 is fixed to the elastic band 13, and the retractable tie buckle 8 is arranged on the second soft bottom plate 9. The other end of the tie body 7 is inserted into the buckle hole of the retractable tie buckle 8 to achieve cooperation with the retractable tie buckle 8. The elastic band 13 is tightened by pulling the tie body 7, and then the tree shrew's head is put into the hood 10 to be positioned.

[0047] Remote control secondary anesthesia device:

[0048] The remote-controlled secondary anesthesia device comprises a micro push rod motor 19 , a slide plate 20 , a remote-controlled motor 21 , a threaded transmission mechanism, a needle seat 22 and a syringe 23 .

[0049] The micro push rod motor 19 is arranged on the side plate 4 of the curved fixed plate 1 , and the slide plate 20 is slidably connected to the inclined plate 5 on the side plate 4 .

[0050] A control box 33 and a motor box 34 are also provided on the side plate 4 of the curved fixed plate 1. The control box 33 is provided with control components such as a power supply and an integrated control circuit board. The micro push rod motor 19 is provided in the motor box 34. The plastic push rod of the micro push rod motor 19 corresponds to the lower end of the slide plate 20. The circuit of the micro push rod motor 19 is controlled by a remote control switch.

[0051] The inclined plate 5 is provided with a slide groove 38, and the two sides of the bottom of the slide plate 20 are provided with a slide rail 39 slidably connected with the slide groove 38, and the lower end of the slide plate 20 is provided with a vertical baffle 24. After the micro push rod motor 19 is energized, the plastic push rod pushes the vertical baffle 24 so that the slide plate 20 is pushed.

[0052] A slider 35 is provided in the middle of the bottom of the slide plate 20 , a groove rail 36 slidably connected to the slider 35 is provided on the inclined plate 5 , a return spring 37 is provided at the rear end of the groove rail 36 , and the return spring 37 is connected to the slider 35 .

[0053] The remote control motor 21 is fixed on the top of the slide 20. The top of the slide 20 is also provided with a side bracket 25. The side bracket 25 has an upper limit rotation groove 26. The threaded transmission mechanism includes a transmission stud 27 and a driven nut 28. The transmission stud 27 is threadedly connected to the lower side wall of the driven nut 28. The transmission stud 27 is connected to the main shaft of the remote control motor 21. Slide bars 29 are provided on both sides of the driven nut 28. The slide bars 29 are slidably connected to the limit rotation groove 26. A notch 30 is provided on the side of the driven nut 28 away from the remote control motor 21, and the end of the stud is arranged in the notch 30. The needle seat 22 is arranged on the top of the slide 20, and the needle seat 22 is a soft rubber pad structure. An opening 31 is provided on the top of the needle seat 22. The syringe 23 is stuck on the needle seat 22 through the opening 31. An injection hole 32 is opened on one side of the curved fixed plate 1, which is adapted to the position of the needle. When the tree shrew is fixed, the rear end of the abdomen of the tree shrew is opposite to the injection hole 32, so as to facilitate secondary anesthesia after the tree shrew suddenly wakes up. The micro push rod motor 19 and the remote control motor 21 are both sealed by a shielding chassis shell, and the shielding chassis shell is made of rare earth polymer-based composite materials. Rare earth polymer-based composite materials are ideal materials for shielding diagnostic X-rays, so that the device can be used for CT examinations; an electromagnetic shielding film is arranged on the inner surface of the shielding chassis shell for electromagnetic shielding, so that the device can be used for MRI examinations.

[0054] Specific usage:

[0055] The first step: use five limb position fixing devices 2 to tighten the limbs and tail of the anesthetized tree shrew, and use the head position fixing device 3 to fix the head of the tree shrew in the head cover 10.

[0056] The specific tightening method is:

[0057] After placing the limbs or tail of the tree shrew on the first soft bottom plate 6, the other end of the tie body 7 is inserted into the buckle hole of the removable tie buckle 8 to achieve cooperation with the removable tie buckle 8, and the limbs and tail of the tree shrew are tightened and positioned by pulling the tie body 7.

[0058] After the tree shrew is placed in the hood 10, the neck of the tree shrew is aligned with the setting position of the elastic cloth 12 and the elastic band 13. Then the other end of the tie body 7 is inserted into the buckle hole of the retractable tie buckle 8 to achieve the matching with the retractable tie buckle 8, and the elastic band 13 is tightened by pulling the tie body 7, and then the head of the tree shrew is placed in the hood 10. The front end of the hood 10 is provided with a vent 11 to facilitate the breathing of the tree shrew. The setting of the elastic cloth 12 and the elastic band 13 is to ensure the tightness and make the tree shrew more comfortable.

[0059] Step 2:

[0060] Then, the limb position fixing device 2 and the head position fixing device 3 are detachably fixed to the top surface of the curved fixing plate 1 through the pressable and deformable buckles 17 or suction cups 18, and the rear end of the tree shrew's abdomen is opposite to the injection hole 32, so as to facilitate secondary anesthesia after the tree shrew suddenly wakes up.

[0061] Step 3:

[0062] During the detection, the connecting shaft end 15 is connected to the main shaft, and the arc surface fixing plate 1 is rotated and adjusted, so as to adjust the body position of the tree shrew.

[0063] If the tree shrew awakens during the inspection, the newly awakened tree shrew is still in a semi-anesthetized state, and the body movement amplitude is not large, which will not affect the detection. At this time, the circuit of the micro push rod motor 19 needs to be connected by remote control. After the micro push rod motor 19 is powered on, the plastic push rod pushes the vertical baffle 24 to push the slide plate 20. During the movement of the slide plate 20, the elastic force of the bottom return spring 37 is overcome, so that the non-metallic needle of the syringe 23 passes through the injection hole 32 and pierces the tree shrew's abdomen. Then the remote control motor 21 is remotely controlled to rotate. Since the slide bar 29 is slidably connected with the rotation-limiting groove 26, the rotation of the driven nut 28 is limited. Therefore, when the remote control motor 21 drives the transmission stud 27 to rotate, the driven nut 28 moves horizontally along the direction of the rotation-limiting groove 26, thereby pushing the piston rod of the syringe 23, and injecting the anesthetic in the syringe 23 into the tree shrew body for secondary anesthesia. After the injection is completed, the micro push rod motor 19 reverses to retract the plastic push rod, and the slide plate 20 is reset and slid back under the action of the reset spring 37, so that the needle of the syringe 23 is removed from the abdominal cavity of the tree shrew, thereby achieving the effect of secondary anesthesia.

[0064] In summary, the device can comfortably and conveniently fix the body position of the anesthetized tree shrew, and the limb position fixing device 2 and the head position fixing device 3 can be detachably fixed at any position on the curved fixing plate 1 according to the body shape of the tree shrew, so that the device is suitable for tree shrews of various sizes. Moreover, the connecting shaft end 15 is connected to the main shaft, and the curved fixing plate 1 is rotated and adjusted to facilitate the body position adjustment during the inspection process. In addition, when the tree shrew suddenly wakes up during the inspection process, the secondary anesthesia device can be remotely controlled to perform timely and convenient secondary anesthesia on the tree shrew.

Claims

1. A body position fixing device for tree shrew CT or MRI examination, characterized in that: It comprises a curved surface fixing plate (1), a limb position fixing device (2), and a head position fixing device (3); Curved fixing plate (1): A side plate (4) is provided at the bottom of the curved surface fixing plate (1), and an inclined plate (5) is provided on the side plate (4); the limb position fixing device (2) and the head position fixing device (3) are detachably fixed on the curved surface fixing plate (1); Limb Position Fixing Device (2): The limb position fixing device (2) comprises a first soft bottom plate (6) detachably connected to the top surface of the curved surface fixing plate (1) and a retractable tie structure; The first soft bottom plate (6) is detachably fixed on the curved fixed plate (1); the retractable cable tie structure comprises a separate cable tie body (7) and a retractable cable tie buckle (8); one end of the cable tie body (7) is fixed to the first soft bottom plate (6); the retractable cable tie buckle (8) is arranged at the other end of the first soft bottom plate (6); the other end of the cable tie body (7) is inserted into the buckle hole of the retractable cable tie buckle (8) to achieve cooperation with the retractable cable tie buckle (8); Head position fixation device (3): The head position fixing device (3) comprises a second soft bottom plate (9) detachably connected to the top surface of the curved fixing plate (1), a retractable tie structure, and a head cover (10); The second soft bottom plate (9) is detachably fixed on the curved surface fixing plate (1); a ventilation hole (11) is provided at the front end of the head cover (10); an elastic cloth (12) is provided at the rear end of the head cover (10); an elastic band (13) is provided on the elastic cloth (12); and the elastic cloth (12) and the elastic band (13) are arranged at positions corresponding to the neck position of the tree shrew; One end of the tie body (7) of the retractable tie structure is fixed to the elastic band (13), and the retractable tie buckle (8) of the retractable tie structure is arranged on the second soft bottom plate (9); Also included is a remote controlled secondary anesthesia device; Remote control secondary anesthesia device: The remote-controlled secondary anesthesia device comprises a micro push rod motor (19), a slide plate (20), a remote-controlled motor (21), a threaded transmission mechanism, a needle seat (22) and a syringe (23); The micro push rod motor (19) is arranged on the side plate (4) of the curved fixed plate (1), and the slide plate (20) is slidably connected to the inclined plate (5) on the side plate (4); The plastic push rod of the micro push rod motor (19) corresponds to the lower end of the slide plate (20); the circuit of the micro push rod motor (19) is controlled by a remote control switch; A vertical baffle (24) is provided at the lower end of the slide plate (20), and when the micro push rod motor (19) is powered on, the plastic push rod pushes the vertical baffle (24) to push the slide plate (20); The remote control motor (21) is fixed on the top of the slide plate (20), and a side bracket (25) is also provided on the top of the slide plate (20), and a rotation limiting groove (26) is provided on the side bracket (25); the threaded transmission mechanism comprises a transmission stud (27) and a driven nut (28), the transmission stud (27) is threadedly connected to the lower side wall of the driven nut (28), the transmission stud (27) is connected to the main shaft of the remote control motor (21), and sliding rods (29) are provided on both sides of the driven nut (28), and the sliding rods (29) are slidably connected to the rotation limiting groove (26), and the driven nut (28) is provided with a side away from the remote control motor (21). A notch (30) is provided, the end of the stud is arranged in the notch (30), the needle seat (22) is arranged on the top of the slide plate (20), and the needle seat (22) is a soft rubber pad structure, an opening (31) is provided on the top of the needle seat (22), the syringe (23) is clamped on the needle seat (22) through the opening (31), and an injection hole (32) is provided on one side of the arc surface fixing plate (1) that is adapted to the position of the non-metallic needle; the micro push rod motor (19) and the remote control motor (21) are both sealed by a shielding case shell, the shielding case shell is made of a rare earth polymer-based composite material, and an electromagnetic shielding film is provided on the inner surface of the shielding case shell; A connecting frame (14) is provided on one side of the arc surface fixing plate (1), and a connecting shaft end (15) is provided on the connecting frame (14).

2. A body position fixing device for tree shrew CT or MRI examination according to claim 1, characterized in that: The arc surface fixing plate (1) is provided with a plurality of positioning holes (16); the bottoms of the first soft bottom plate (6) and the second soft bottom plate (9) are provided with pushable and deformable buckles (17) which are detachably connected to the positioning holes (16).

3. The body position fixing device for tree shrew CT or MRI examination according to claim 1, characterized in that: The top surface of the arc-surface fixing plate (1) is a smooth top surface, and suction cups (18) are provided at the bottoms of the first soft bottom plate (6) and the second soft bottom plate (9).

4. The body position fixing device for tree shrew CT or MRI examination according to claim 1, characterized in that: A control box (33) and a motor box (34) are also provided on the side plate (4) of the arc surface fixing plate (1); a power supply and an integrated control circuit board are provided in the control box (33); and the micro push rod motor (19) is provided in the motor box (34).

5. The body position fixing device for tree shrew CT or MRI examination according to claim 1, characterized in that: A slider (35) is provided in the middle of the bottom of the slide plate (20), a groove rail (36) slidably connected to the slider (35) is provided on the inclined plate (5), a return spring (37) is provided at the rear end of the groove rail (36), and the return spring (37) is connected to the slider (35).

6. The body position fixing device for tree shrew CT or MRI examination according to claim 1, characterized in that: The inclined panel (5) is provided with a slide groove (38), and two sides of the bottom of the slide plate (20) are provided with slide rails (39) slidably connected to the slide groove (38).

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