An adaptive body positioning and anti-movement assistive device for MRI examination

Abstract

This invention discloses an adaptive body positioning and anti-movement auxiliary device for MRI examinations, comprising a body, an examination bed mounted on one side of the body, a body positioning fine-tuning mechanism positioned at the center above the examination bed, a head positioning mechanism positioned on the side of the examination bed closer to the body, and a limb positioning mechanism positioned on the side of the examination bed farther from the body. The body positioning fine-tuning mechanism includes a slot in the center of the examination bed, a micro-moving plate disposed inside the slot, and side sliders fixedly mounted on both sides of the micro-moving plate. Side slider grooves matching the side sliders are formed on both sides of the inner side wall of the slot. This invention, by setting up separate head positioning mechanism, body positioning fine-tuning mechanism, and limb positioning mechanism, achieves comprehensive and systematic fixation of the patient's head, torso, and limbs, with multi-site coordinated positioning, completely avoiding imaging artifacts caused by displacement of a single part, significantly improving the imaging quality of MRI examinations, and reducing the re-examination rate.

Description

Technical Field

[0001] This invention relates to the field of MRI examination auxiliary equipment technology, and in particular to an adaptive body positioning and anti-movement auxiliary device for MRI examination. Background Technology

[0002] MRI, or magnetic resonance imaging, is a commonly used non-invasive imaging technique in clinical medicine. With its advantages of being radiation-free, providing high-resolution images, and offering excellent soft tissue resolution, it is widely used to diagnose diseases in various parts of the body, including the brain, spine, limbs, and abdominal organs. During an MRI examination, patient stability is crucial for ensuring image quality. If the patient experiences limb movement, body shift, or head displacement, it can directly lead to artifacts, blurring, and ghosting in the images, severely impacting the doctor's accurate diagnosis of lesions and potentially requiring a second examination, increasing patient examination time and medical resource consumption.

[0003] Currently, the positioning and immobilization devices used in clinical MRI examinations are relatively simple in structure, mostly consisting of simple straps, fixation plates, and foam limiting pads. These structures have several drawbacks: First, the fixation method is crude, unable to adapt to patients of different heights, body types, and postures, resulting in poor fit and a tendency for loose fixation leading to displacement, or excessive tightness compressing the patient's body, making it difficult to balance comfort and stability. Second, their functionality is limited, only providing basic positioning and immobilization, unable to allow for precise micro-adjustments to the patient's position during the examination, making them unsuitable for the demands of refined imaging. Third, the separate fixation of multiple body parts (head, trunk, limbs) is poor, lacking a systematic positioning and immobilization structure. The fixation of each part is independent and lacks coordination, easily leading to local displacement affecting the overall imaging effect. Fourth, most fixation structures are fixed, with poor adaptability, unable to accommodate different limb lengths and positioning angles, and the disassembly and adjustment operations are cumbersome, significantly reducing examination efficiency.

[0004] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop an adaptive body positioning and anti-movement auxiliary device for MRI examinations. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an adaptive body positioning and anti-movement auxiliary device for MRI examination, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: An adaptive body positioning and anti-movement auxiliary device for MRI examination includes a body, an examination bed is provided on one side of the body, a body positioning fine adjustment mechanism is provided at the middle position above the examination bed, a head positioning mechanism is provided on the side of the examination bed closer to the body, and a limb positioning mechanism is provided on the side of the examination bed away from the body. The body position fixing fine adjustment mechanism includes a slot in the middle of the examination bed, a micro-moving plate inside the slot, side sliders fixedly installed on both sides of the micro-moving plate, side slider grooves matching the side sliders on both sides of the inner side wall of the slot, the side sliders being slidably assembled inside the side slider grooves, two through-type sliding plate grooves symmetrically opened above the micro-moving plate, a mounting shell fixedly installed at the bottom of the micro-moving plate, a body position fixing component located at the bottom of the micro-moving plate and inside the mounting shell, and a fine adjustment component at the bottom of the mounting shell; The fine-tuning assembly includes a base frame fixedly mounted on the bottom of the mounting housing. A rotating rod is rotatably connected inside the base frame via bearings. One end of the rotating rod passes through the side wall of the base frame and extends to the outside, with a first gear fixedly sleeved on the outer side of the rotating rod. A second side box is fixedly mounted on the side wall of the base frame near the first gear. A first sliding plate is fixedly mounted on the side wall of the base frame, and a first toothed plate is fixedly mounted on the side of the first sliding plate near the first gear, meshing with the first gear. Two parallel first sliding rods are fixedly mounted inside the second side box, passing through and slidably connected to the first sliding plate. A second cylinder is mounted on the outer side of the second side box, with its output end fixedly connected to the first sliding plate. Traction units are mounted on both sides of the micro-moving plate. Each traction unit includes two connecting ropes, one end of which is fixedly connected to the micro-moving plate, and the other end of which is fixedly connected to a coil. Both coils are fixedly sleeved on the outer side of the rotating rod.

[0007] To address the issues of slippage, severe wear, and unstable traction path of the connecting rope, which lead to low micro-adjustment accuracy of the micro-movement plate, a through groove is provided at the bottom of the inspection bed corresponding to the position of the connecting rope. The through groove connects the bottom of the inspection bed to the empty slot, and the connecting rope passes through the through groove. A second pulley is rotatably connected to the inside of the through groove via a bearing, and the connecting rope slides in contact with the surface of the second pulley. First pulleys are provided on both sides of the mounting shell corresponding to the position of the connecting rope, and the connecting rope slides in contact with the surface of the first pulley. A side frame is connected to one side of the first pulley via a bearing, and the side frame is fixedly connected to the side wall of the mounting shell.

[0008] To address the issues of poor patient trunk fixation adaptability, uncontrollable fixation force, cumbersome assembly and disassembly, and inability to adapt to the trunk fixation of patients with different body types, the positioning fixation component includes two sliding plates. Each sliding plate has a corresponding slot. A limiting frame is fixedly installed at the top of each sliding plate, and a limiting block is fitted inside the limiting frame. A long strap is fixedly connected between the two limiting blocks. Two connecting plates are fixedly assembled between the bottoms of the two sliding plates. Two horizontal plates are symmetrically fixedly installed between the two sides of the middle of the two sliding plates. Each horizontal plate has a groove on its surface, and a rotating column is slidably assembled inside the groove. A connecting arm is fixedly connected to one side of each rotating column. A connecting rod is fixedly connected to the side away from the rotating column. The connecting rod passes through the mounting shell and is rotatably connected to the mounting shell via a bearing. A second gear is fixedly sleeved on the outside of the connecting rod. A first side box is fixedly installed on the side of the mounting shell corresponding to the second gear. A second sliding plate is provided inside the first side box. A second toothed plate is fixedly assembled on the side of the second sliding plate near the second gear. The second toothed plate meshes with the second gear. Two parallel second sliding rods are fixedly installed inside the first side box. The second sliding rods pass through the second sliding plate and are slidably connected to the second sliding plate. A first cylinder is fixedly installed on the outside of the first side box. The output end of the first cylinder is fixedly connected to the second sliding plate.

[0009] In order to solve the problem of sliding deviation and poor operation stability of the skateboard, which leads to the deviation of the fixed position of the torso, two slide rods are fixedly installed at the corresponding positions of the connecting plate between the micro-moving plate and the mounting shell. The slide rods pass through the connecting plate and are slidably connected to the connecting plate.

[0010] To address the issues of inflexible limb fixation position, uncontrollable fixation height, poor positioning stability, and difficulty in adapting to the limb placement needs of different patients, the limb positioning mechanism includes several sets of limb fixation components, each including a sliding block. The top of the mechanism body has two short sliding block slots and two long sliding block grooves symmetrically arranged, with the sliding blocks slidably fitted inside the short and long sliding block slots. The top and bottom of each side wall of the sliding block are rotatably connected to side support wheels via bearings, and these side support wheels roll in contact with the top and bottom inner walls of the short and long sliding block slots, respectively. A column is fixedly installed on the top of the sliding block, and the top of the column rotates... The device is equipped with a slip ring, the top of which is fixedly connected to a telescopic corrugated tube, and the top of the telescopic corrugated tube is fixedly installed with a top plate. A handle is fixedly installed on the top of the top plate, and a silicone pressure block is fixedly installed on the bottom of the top plate and inside the telescopic corrugated tube. A sliding column is fixedly connected to the bottom of the sliding column, and a guide post is fixedly installed at the bottom of the sliding column. The guide post passes through the sliding block and is slidably connected to the sliding block. A first spring is sleeved on the outside of the sliding column, the top of the first spring is fixedly connected to the bottom of the sliding column, and the bottom of the first spring is fixedly connected to the inside of the sliding block. Several full-circle grooves are opened on the outside of the sliding column in the vertical direction, and a limit component is provided on one side of the column corresponding to the sliding column.

[0011] To address the issue of unstable locking after limb height adjustment, which can lead to springback, loosening, and fixation failure, the limiting component includes an inner groove inside the column. A locking block is movably disposed inside the inner groove, and the locking block engages with a locking groove on the outside of the sliding column. A round rod is fixedly connected to one side of the locking block, and a second spring is sleeved on the outside of the round rod. The two ends of the second spring are fixedly connected to the locking block and the inner wall of the inner groove, respectively. The end of the round rod away from the locking block extends to the outside of the column and slides through it. A pull ring is fixedly fitted to the outer end of the round rod.

[0012] In order to solve the problem that the sliding block has no fixed limit after adjustment and is prone to slippage during inspection, which leads to the fixed displacement of the limbs, the bottom of the short sliding block groove and the long sliding block groove are evenly provided with several limiting holes, and the limiting holes are inserted and matched with the bottom end of the guide post.

[0013] To address the issues of low head positioning accuracy, poor cushioning and protection, and the inability to adaptively adjust the tightness of the straps, the head positioning mechanism includes a base shell fixedly installed at the bottom of the examination bed. A lead screw is rotatably connected to the inside of the base shell via a bearing. One end of the lead screw extends to the outside of the base shell and is fixedly fitted with a hand crank. A threaded plate is threaded onto the outer side of the lead screw, and the threaded plate is slidably connected to the inner wall of the base shell. A U-shaped connecting plate is fixedly connected to one side of the threaded plate, and a bracket is fixedly installed on the outer side of the U-shaped connecting plate. A silicone positioning gasket is fixedly fitted to the inner side of the bracket. Lifting lugs are fixedly installed on both sides of the bracket. One of the lifting lugs is fixedly connected to a short strap, which passes through the other lifting lug and is secured by Velcro. A limit rod is fixedly fitted to one side of the U-shaped connecting plate. A sliding hole is provided on the examination bed corresponding to the position of the limit rod, and the limit rod extends into the sliding hole and is slidably connected to it.

[0014] In order to solve the problems of poor smoothness of movement and lack of protective structure of the examination bed, a protective shell is fixedly installed at the bottom of the examination bed, a slide is fitted at the bottom of the protective shell, a slide rail is slidably fitted at the bottom of the slide, and a base is fixedly installed at the bottom of the slide rail.

[0015] To facilitate the assembly of the limb fixation components, a baffle is fixedly installed on the side of the examination bed away from the U-shaped connecting plate.

[0016] The above technical solution has the following beneficial effects: 0. This invention achieves comprehensive and systematic fixation of the patient's head, torso, and limbs by setting up a split head positioning mechanism, a body position fixation and fine adjustment mechanism, and a limb positioning mechanism. The multi-site coordinated positioning completely avoids the imaging artifact problem caused by the displacement of a single part, greatly improves the imaging quality of MRI examinations, and reduces the re-examination rate.

[0017] 0. This invention, by setting up a pneumatically driven fine-tuning component and a body position fixing component, can achieve adaptive and precise adjustment of the patient's torso fixation force and fixation position. Combined with the pulley traction structure, it can achieve smooth and small-amplitude fine-tuning of the micro-movement plate, adapting to the needs of fine body position adjustment during the examination process, with high adjustment accuracy and good operational stability.

[0018] 0. The limb positioning mechanism of the present invention can achieve adaptive adjustment at any position, any height, and any angle. Through multiple limiting structures such as spring limiting, slot locking, and guide post insertion, the stability of limb fixation is ensured. At the same time, the silicone pressure block provides flexible fixation, avoiding rigid compression of the patient's limbs, thus balancing fixation stability and patient examination comfort.

[0019] 0. The head positioning mechanism of this invention adopts a screw-driven hand-cranked precise adjustment, combined with silicone buffer pads and Velcro straps, which can adaptively adjust the positioning position and fixation tightness according to different patient head shapes and neck lengths. The positioning is accurate, the assembly and disassembly are convenient, and the adaptability is extremely strong. The whole invention adopts a fully mechanical drive structure, which is free from electromagnetic interference and is fully adapted to the special environmental requirements of MRI examination. The equipment operates stably and has a low failure rate. At the same time, the modular design of the structure makes operation simple and greatly improves the work efficiency of clinical MRI examination. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the examination bed provided by the present invention; Figure 3 A bottom view of the examination bed provided by the present invention; Figure 4 A perspective view of the long strap provided by the present invention; Figure 5 This is a partial sectional view of the examination bed provided by the present invention; Figure 6 This is a cross-sectional view of the body position fixing fine-tuning mechanism provided by the present invention; Figure 7 A perspective view of the fine-tuning component provided by the present invention; Figure 8 A perspective view of the body positioning fixation component provided by the present invention; Figure 9 A three-dimensional view of the micro-moving plate provided by the present invention; Figure 10 A perspective view of the limb fixation component provided by the present invention; Figure 11 A cross-sectional view of the limb fixation component provided by the present invention; Figure 12 Provided by the present invention Figure 5 Enlarged view of point A in the image; Figure 13 Provided by the present invention Figure 5 Enlarged view of point B in the image; Figure 14 Provided by the present invention Figure 6 Enlarged view of point C in the image; Figure 15 Provided by the present invention Figure 11 Enlarged view of point D in the image.

[0023] In the diagram: 1. Machine body; 2. Inspection bed; 3. Protective shell; 4. U-shaped connecting plate; 5. Short strap; 6. Long strap; 7. Slide seat; 8. Base; 9. Slide rail; 10. Empty slot; 11. Micro-moving plate; 12. Short sliding block slot; 13. Long sliding block slot; 14. Baffle; 15. Limiting rod; 16. Limiting hole; 17. Locking block; 18. Bottom shell; 19. Lead screw; 20. Hand crank; 21. Threaded plate; 22. Through slot; 23. Mounting shell; 24. First side box; 25. First cylinder; 26. Connecting rope; 27. Side frame; 28. First pulley; 29. ​​Base frame; 30. Rotating rod; 31. Thread reel; 32. Second side box; 33. Second cylinder; 34. Slide plate; 35. Slide rod; 36. Connecting plate; 37. Horizontal plate; 38. Connecting... 39. Connecting arm; 40. Rotating column; 41. Limiting block; 42. Limiting frame; 43. Second pulley; 44. First sliding rod; 45. First sliding plate; 46. First toothed plate; 47. First gear; 48. Second sliding rod; 49. Second sliding plate; 50. Second toothed plate; 51. Second gear; 52. Side slider; 53. Side slider groove; 54. Slide groove; 55. Sliding block; 56. Side support wheel; 57. Pull ring; 58. Telescopic corrugated pipe; 59. Top plate; 60. Silicone pressure block; 61. Handle; 62. Sliding column; 63. Slip ring; 64. Guide column; 65. First spring; 66. Card holder; 67. Silicone positioning pad; 68. Lifting lug; 69. Inner groove; 70. Round rod; 71. Second spring; 72. Column. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] See Figures 1-15As shown, an adaptive body positioning and anti-movement auxiliary device for MRI examination according to the present invention includes a body 1, an examination bed 2 is provided on one side of the body 1, a body positioning fine adjustment mechanism is provided at the middle position above the examination bed 2, a head positioning mechanism is provided on the side of the examination bed 2 near the body 1, and a limb positioning mechanism is provided on the side of the examination bed 2 away from the body 1. The body position fixing fine adjustment mechanism includes a slot 10 in the middle of the examination bed 2. A micro-moving plate 11 is provided inside the slot 10. Side sliders 52 are fixedly installed on both sides of the micro-moving plate 11. Side slider grooves 53 matching the side sliders 52 are opened on both sides of the inner side wall of the slot 10. The side sliders 52 are slidably assembled inside the side slider grooves 53. Two through-type sliding plate grooves 54 are symmetrically opened above the micro-moving plate 11. A mounting shell 23 is fixedly installed at the bottom of the micro-moving plate 11. A body position fixing component is provided at the bottom of the micro-moving plate 11 and inside the mounting shell 23. A fine adjustment component is provided at the bottom of the mounting shell 23. The fine-tuning assembly includes a base frame 29 fixedly mounted on the bottom of the mounting housing 23. A rotating rod 30 is rotatably connected inside the base frame 29 via bearings. One end of the rotating rod 30 passes through the side wall of the base frame 29 and extends to the outside. A first gear 47 is fixedly sleeved on the outer side of the rotating rod 30. A second side box 32 is fixedly mounted on the side wall of the base frame 29 near the first gear 47. A first sliding plate 45 is fixedly provided on the side wall of the base frame 29. A first toothed plate 46 is fixedly assembled on the side of the first sliding plate 45 near the first gear 47, and the first toothed plate 46 meshes with the first gear 47. Two parallel first sliding rods 44 are fixedly mounted inside the second side box 32. The first sliding rods 44 pass through the first sliding plate 45 and are slidably connected to it. A second cylinder 33 is mounted on the outer side of the second side box 32. The output end of the second cylinder 33 is fixedly connected to the first sliding plate 45. The micro-moving plate 11 is equipped with traction units on both sides. Each traction unit includes two connecting ropes 26. One end of each connecting rope 26 is fixedly connected to the micro-moving plate 11, and the other end of each connecting rope 26 is fixedly connected to a coil 31. Both coils 31 are fixedly sleeved on the outside of the rotating rod 30. A through groove 22 is provided at the bottom of the examination bed 2 corresponding to the position of the connecting rope 26. The through groove 22 connects the bottom of the examination bed 2 to the empty groove 10. The connecting rope 26 passes through the through groove 22. A second pulley 43 is rotatably connected to the inside of the through groove 22 through a bearing. The connecting rope 26 slides in contact with the surface of the second pulley 43. A first pulley 28 is provided on both sides of the mounting shell 23 corresponding to the position of the connecting rope 26. The connecting rope 26 slides in contact with the surface of the first pulley 28. A side frame 27 is connected to one side of the first pulley 28 through a bearing. The side frame 27 is fixedly connected to the side wall of the mounting shell 23.

[0026] Working principle: When the equipment is working, the second cylinder 33 drives the first sliding plate 45 to slide horizontally along the first sliding rod 44. The first sliding plate 45 drives the first toothed plate 46 to move synchronously, and through tooth meshing transmission, drives the first gear 47 to rotate forward or backward, thereby driving the rotating rod 30 inside the base frame 29 to rotate synchronously. When the rotating rod 30 rotates, it drives the two sets of coils 31 fixed on the outside to rotate synchronously, realizing the linkage effect of winding the connecting rope 26 on one side and unwinding the connecting rope 26 on the other side. During the sliding process of the connecting rope 26, the first pulley 28 and the second pulley 43 play the roles of guiding, reducing friction and limiting the connecting rope 26, avoiding direct friction and jamming between the connecting rope 26 and the equipment structure, and standardizing the traction path. Finally, the traction force of the connecting rope 26 drives the micro-moving plate 11 to move smoothly and slightly left and right along the side slider groove 53 with the help of the side slider 52, realizing precise micro-adjustment of the patient's trunk position, meeting the position adjustment requirements of MRI fine imaging, with smooth sliding and high adjustment accuracy throughout the process, without any deviation or jamming problems.

[0027] The body positioning fixation assembly includes two sliding plates 34, each corresponding to a sliding plate groove 54. A limiting frame 42 is fixedly installed at the top of each sliding plate 34, with a limiting block 41 engaging inside the limiting frame 42. A long strap 6 is fixedly connected between the two limiting blocks 41. Two connecting plates 36 are fixedly assembled between the bottoms of the two sliding plates 34. Two horizontal plates 37 are symmetrically fixedly installed between the two sides of the middle of the two sliding plates 34. Each horizontal plate 37 has a groove on its surface, and a rotating column 40 is slidably assembled inside the groove of each horizontal plate 37. A connecting arm 39 is fixedly connected to one side of the rotating column 40, and a connecting rod 38 is fixedly connected to the side of the connecting arm 39 away from the rotating column 40. The connecting rod 38 passes through the mounting shell 23 and is rotatably connected to the mounting shell 23 via a bearing. The outer side of the connecting rod 38 is fixed... A second gear 51 is fitted onto the mounting shell 23, and a first side box 24 is fixedly installed on one side of the mounting shell 23 corresponding to the second gear 51. A second sliding plate 49 is provided inside the first side box 24, and a second toothed plate 50 is fixedly assembled on the side of the second sliding plate 49 near the second gear 51. The second toothed plate 50 meshes with the second gear 51. Two parallel second sliding rods 48 are fixedly installed inside the first side box 24. The second sliding rods 48 pass through the second sliding plate 49 and are slidably connected to the second sliding plate 49. A first cylinder 25 is fixedly installed on the outside of the first side box 24. The output end of the first cylinder 25 is fixedly connected to the second sliding plate 49. Two sliding rods 35 are fixedly installed between the micro-moving plate 11 and the mounting shell 23 at positions corresponding to the connecting plate 36. The sliding rods 35 pass through the connecting plate 36 and are slidably connected to the connecting plate 36.

[0028] Working principle: After the patient lies down and initial positioning is achieved, the first cylinder 25 is activated, driving the second sliding plate 49 to slide horizontally along the second sliding rod 48. The second sliding plate 49 drives the second toothed plate 50 to move synchronously, driving the second gear 51 to rotate through meshing transmission, which in turn drives the connecting rod 38 and connecting arm 39 to rotate synchronously. When the connecting arm 39 rotates, it drives the rotating column 40 to slide along the groove of the horizontal plate 37, pushing the horizontal plate 37 downward as a whole through the lever transmission structure. The horizontal plate 37 drives the sliding plate 34 to slide vertically and smoothly down along the sliding rod 35. The sliding rod 35 effectively limits the sliding deviation of the sliding plate 34, ensuring operational stability. When the sliding plate 34 slides down, it drives the top limiting frame 42, limiting block 41 and long strap 6 to move downward synchronously, so that the long strap 6 fits the patient's waist, hips and torso, achieving flexible wrapping and fixation. The downward pressure and tightness of the long strap 6 can be precisely adjusted by controlling the extension and retraction stroke of the first cylinder 25 to suit the fixation needs of patients of different weights and body types. At the same time, the limiting block 41 and the limiting frame 42 can be detachably snapped together, which facilitates the disassembly, replacement and cleaning of the long strap 6.

[0029] The limb positioning mechanism includes several sets of limb fixing components, each including a sliding block 55. The top of the body 1 has two short sliding block grooves 12 and two long sliding block grooves 13 symmetrically arranged. The sliding block 55 is slidably fitted inside the short sliding block grooves 12 and the long sliding block grooves 13. The top and bottom of both side walls of the sliding block 55 are rotatably connected to side support wheels 56 via bearings. The side support wheels 56 roll in contact with the top and bottom inner walls of the short sliding block grooves 12 and the long sliding block grooves 13, respectively. A column 72 is fixedly installed at the top of the 5-axis. A slip ring 63 is rotatably mounted on the top of the column 72. A telescopic corrugated pipe 58 is fixedly connected to the top of the slip ring 63. A top plate 59 is fixedly installed on the top of the telescopic corrugated pipe 58. A handle 61 is fixedly mounted on the top of the top plate 59. A silicone pressure block 60 is fixedly installed on the bottom of the top plate 59 and inside the telescopic corrugated pipe 58. A guide post 64 is fixedly mounted on the bottom end of the sliding post 62. The guide post 64 passes through the sliding block 55 and is connected to the sliding block. 55 Sliding connection; a first spring 65 is sleeved on the outer side of the sliding column 62, the top end of the first spring 65 is fixedly connected to the bottom of the sliding column 62, and the bottom end of the first spring 65 is fixedly connected to the inside of the sliding block 55; several full-circle slots are opened on the outer side of the sliding column 62 in the vertical direction, and a limiting component is provided inside the column body 72 on one side corresponding to the sliding column 62. The limiting component includes an inner groove 69 opened inside the column body 72, and a locking block 17 is movably disposed inside the inner groove 69. The locking block 17 engages with the locking block 55 on the outer side of the sliding column 62. The slot and buckle are engaged; a round rod 70 is fixedly connected to one side of the locking block 17, and a second spring 71 is sleeved on the outside of the round rod 70. The two ends of the second spring 71 are fixedly connected to the locking block 17 and the inner wall of the inner groove 69, respectively; the end of the round rod 70 away from the locking block 17 extends to the outside of the column 72 and slides with the column 72, and a pull ring 57 is fixedly assembled at the outer end of the round rod 70. Several limiting holes 16 are evenly opened at the bottom of the short sliding block groove 12 and the long sliding block groove 13, and the limiting holes 16 are inserted into the bottom end of the guide post 64.

[0030] Working principle: When immobilizing a patient's limbs, firstly, based on the position of the patient's limbs, push the sliding block 55. Through the rolling action of the side support wheel 56, the sliding block 55 slides smoothly along the short sliding block groove 12 or the long sliding block groove 13, quickly adjusting the horizontal position of the limb immobilization to adapt to different limb lengths and placement requirements. After the position adjustment is completed, press down on the handle 61, causing the top plate 59, sliding column 62, and guide column 64 to move down synchronously. The telescopic corrugated tube 58 is compressed and folded, and the first spring 65 is compressed and stores energy. The silicone pressure block 60 at the bottom of the top plate 59 adheres to the surface of the patient's limbs. The bottom of the silicone pressure block 60 is concave. After adhering to the limbs, it achieves flexible pressure fixation and stops rotation. During the downward movement, the locking block 17 inside the column 72 automatically engages with the corresponding slot of the sliding column 62 under the elastic force of the second spring 71, achieving height locking and preventing springback loosening. Simultaneously, the bottom end of the guide column 64 inserts into the corresponding limiting hole 16, achieving fixed-point locking of the sliding block 55 and completely preventing horizontal slippage. The slip ring 63 can rotate the top structure 360°, flexibly adjusting the pressing angle of the silicone pressure block 60 to adapt to different limb positioning postures. After inspection, pulling the pull ring 57 causes the locking block 17 to disengage from the slot via the round rod 70, and the first spring 65 returns to its original position, allowing for quick lifting of the silicone pressure block 60 and release of the limb fixation. The operation is convenient and efficient.

[0031] The head positioning mechanism includes a bottom shell 18 fixedly installed at the bottom of the examination bed 2. A lead screw 19 is rotatably connected inside the bottom shell 18 via a bearing. One end of the lead screw 19 extends to the outside of the bottom shell 18 and is fixedly fitted with a hand crank 20. A threaded plate 21 is threadedly fitted on the outside of the lead screw 19, and the threaded plate 21 is slidably connected to the inner wall of the bottom shell 18. A U-shaped connecting plate 4 is fixedly connected to one side of the threaded plate 21. A bracket 66 is fixedly installed on the outside of the U-shaped connecting plate 4, and a silicone positioning pad 67 is fixedly fitted on the inside of the bracket 66. A lifting lug 68 is fixedly provided on both sides of the bracket 66. A short strap 5 is fixedly connected to one of the lifting lugs 68, and the short strap 5 passes through the other lifting lug 68 and is fixedly fastened by Velcro. A limit rod 15 is fixedly fitted on one side of the U-shaped connecting plate 4. A sliding hole is opened on the examination bed 2 at the position corresponding to the limit rod 15. The limit rod 15 extends into the sliding hole and is slidably connected to the sliding hole.

[0032] Working principle: After the patient lies down, medical staff rotate the hand crank 20, which drives the lead screw 19 to rotate. Utilizing the threaded transmission between the lead screw 19 and the threaded plate 21, the threaded plate 21 slides horizontally along the inner wall of the bottom shell 18. Simultaneously, the limiting rod 15 slides synchronously along the sliding hole of the examination bed 2, limiting the rotational displacement of the U-shaped connecting plate 4 and ensuring accurate displacement. The threaded plate 21 drives the U-shaped connecting plate 4 and the bracket 66 to move under the patient's head, allowing the patient's head to fit snugly on top of the silicone positioning pad 67. The silicone material provides good cushioning and fit, improving patient comfort while achieving initial head positioning. Then, the short strap 5 is threaded through the two side lugs 68 and secured with Velcro. The tightness of the strap can be adjusted adaptively according to the patient's head circumference, achieving stable head wrapping and fixation, effectively preventing head movement and displacement during the examination.

[0033] The bottom of the examination bed 2 is fixedly installed with a protective shell 3, the bottom of the protective shell 3 is equipped with a slide 7, the bottom of the slide 7 is slidably equipped with a slide rail 9, and the bottom of the slide rail 9 is fixedly installed with a base 8.

[0034] Working Principle: The base 8 provides stable support for the entire device, ensuring its stable placement. The protective shell 3 encloses and protects the transmission and connection structures at the bottom of the examination bed 2, preventing dust and debris from entering the device and causing jamming or wear, while also improving the safety of the device. When patients enter or exit the examination station or when the device is being aligned, the slide 7 can slide smoothly along the slide rail 9, causing the examination bed 2 to move horizontally as a whole. This allows for precise alignment, flexible movement, smooth sliding, and high stability, meeting the alignment requirements of MRI equipment.

[0035] A baffle 14 is fixedly installed on the side of the examination bed 2 away from the U-shaped connecting plate 4.

[0036] After the baffle 14 is removed, it is convenient to remove and remove the limb fixation components.

[0037] The main body 1, examination bed 2, protective shell 3, base 8, baffle 14, bottom shell 18, mounting shell 23, first side box 24, second side box 32, and base frame 29 are all made of thickened high-strength medical carbon fiber, which is sturdy, non-magnetic, structurally stable, resistant to deformation, and does not interfere with magnetic fields.

[0038] Micro-moving plate 11, side slider 52, sliding block 55, sliding plate 34, connecting plate 36, horizontal plate 37, U-shaped connecting plate 4, card holder 66: Made of thickened medical engineering plastic PEEK material, lightweight, wear-resistant, non-magnetic, and corrosion-resistant.

[0039] Lead screw 19, rotating rod 30, connecting rod 38, rotating column 40, round rod 70, sliding rod 35, guide column 64, sliding column 62: all are made of thickened non-magnetic titanium alloy, which has high strength and good toughness and is completely not attracted by magnetic fields.

[0040] First gear 47, second gear 51, first tooth plate 46, second tooth plate 50, and spool 31: are made of thickened non-magnetic nylon gear material, ensuring smooth meshing and transmission without electromagnetic induction.

[0041] First sliding rod 44, second sliding rod 48, limit rod 15: Made of thickened medical non-magnetic ceramic rod, which slides smoothly and is insulated and non-magnetic.

[0042] First pulley 28, second pulley 43, side support wheel 56: The wheel body is made of thickened wear-resistant non-magnetic polyurethane material, and the wheel axle is matched with a non-magnetic ceramic rotating shaft, so that the rolling is smooth and there is no magnetic field reaction.

[0043] Cylinder 25 (first cylinder) and Cylinder 33 (second cylinder): The entire machine is made of thickened, all-plastic, non-magnetic pneumatic cylinders. There are no metal magnetic conductive parts in the internal components. It is driven by air pressure and is suitable for nuclear magnetic resonance environments.

[0044] Connecting rope 26: Made of thickened, high-strength, non-magnetic polyester braided rope, it is tensile-resistant and wear-resistant, and will not be affected by magnetic fields.

[0045] Long strap 6, short strap 5, Velcro: made of thickened medical sterile elastic non-woven fabric, skin-friendly and non-magnetic, fits the human body without irritation.

[0046] Silicone positioning pad 67 and silicone pressure block 60: made of thickened medical-grade food-grade silicone, flexible and cushioning, non-magnetic, with excellent protective fit.

[0047] Limiting block 41, limiting frame 42, locking block 17, pull ring 57, lifting lug 68, column 72, slip ring 63, top plate 59, and handle 61: are all made of thickened non-magnetic ABS medical plastic, which has good moldability and is safe to use.

[0048] First spring 65 and second spring 71: They are made of thickened non-magnetic titanium alloy springs, which are elastically stable and will not produce a magnetization effect.

[0049] Hand crank 20 and threaded plate 21: Made of thickened, non-magnetic hard plastic in one piece, easy to operate and free from magnetic field interference.

[0050] 58 Telescopic Corrugated Pipe: Made of thickened, flexible, non-magnetic rubber, its telescopic deformation is unaffected by magnetic fields.

[0051] Slide rail 9 and slide block 7: Thickened non-magnetic carbon fiber slide rail assembly, ensuring smooth sliding and eliminating magnetic offset issues.

[0052] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. An adaptive body positioning and anti-movement auxiliary device for MRI examination, comprising a body (1), characterized in that: An examination bed (2) is provided on one side of the body (1). A body position fixing fine adjustment mechanism is provided at the middle position above the examination bed (2). A head positioning mechanism is provided on the side of the examination bed (2) closer to the body (1). A limb positioning mechanism is provided on the side of the examination bed (2) away from the body (1). The body position fixing fine adjustment mechanism includes a slot (10) in the middle of the examination bed (2), a micro-moving plate (11) is provided inside the slot (10), side sliders (52) are fixedly installed on both sides of the micro-moving plate (11), and side slider grooves (53) matching the side sliders (52) are provided on both sides of the inner side wall of the slot (10). The side sliders (52) are slidably assembled in the side slider grooves (53). Two through-type sliding plate grooves (54) are symmetrically opened above the micro-moving plate (11). A mounting shell (23) is fixedly installed at the bottom of the micro-moving plate (11). A body position fixing component is provided at the bottom of the micro-moving plate (11) and inside the mounting shell (23). A fine adjustment component is provided at the bottom of the mounting shell (23). The fine-tuning assembly includes a base frame (29) fixedly installed at the bottom of the mounting housing (23). A rotating rod (30) is rotatably connected inside the base frame (29) via a bearing. One end of the rotating rod (30) passes through the side wall of the base frame (29) and extends to the outside. A first gear (47) is fixedly sleeved on the outside of the rotating rod (30). A second side box (32) is fixedly installed on the side wall of the base frame (29) near the first gear (47). A first sliding plate (45) is fixedly provided on the side wall of the base frame (29). A first toothed plate (46) is fixedly assembled on the side of the first sliding plate (45) near the first gear (47). The first toothed plate (46) meshes with the first gear (47). The second side box... Two parallel sliding rods (44) are fixedly installed inside the body (32). The first sliding rods (44) pass through the first sliding plate (45) and are slidably connected to the first sliding plate (45). A second cylinder (33) is installed on the outside of the second side box (32). The output end of the second cylinder (33) is fixedly connected to the first sliding plate (45). Both sides of the micro-moving plate (11) are equipped with traction units. The traction unit includes two connecting ropes (26). One end of the two connecting ropes (26) is fixedly connected to the micro-moving plate (11). The other end of the two connecting ropes (26) is fixedly connected to a coil (31). The two coils (31) are fixedly sleeved on the outside of the rotating rod (30).

2. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 1, characterized in that: The bottom of the examination bed (2) is provided with a through groove (22) corresponding to the position of the connecting rope (26). The through groove (22) connects the bottom of the examination bed (2) with the empty groove (10). The connecting rope (26) passes through the through groove (22). The inside of the through groove (22) is rotatably connected to a second pulley (43) through a bearing. The connecting rope (26) slides in contact with the surface of the second pulley (43). The two sides of the mounting shell (23) are provided with a first pulley (28) corresponding to the position of the connecting rope (26). The connecting rope (26) slides in contact with the surface of the first pulley (28). A side frame (27) is connected to one side of the first pulley (28) through a bearing. The side frame (27) is fixedly connected to the side wall of the mounting shell (23).

3. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 2, characterized in that: The body positioning fixation assembly includes two sliding plates (34), each corresponding to a sliding plate groove (54). A limiting frame (42) is fixedly installed at the top of each sliding plate (34). A limiting block (41) is fitted inside the limiting frame (42), and a long strap (6) is fixedly connected between the two limiting blocks (41). Two connecting plates (36) are fixedly assembled between the bottoms of the two sliding plates (34). Two horizontal plates (37) are symmetrically fixedly installed between the two sides of the middle of the two sliding plates (34). Each horizontal plate (37) has a groove on its surface, and a rotating column (40) is slidably assembled inside the groove of the horizontal plate (37). A connecting arm (39) is fixedly connected to one side of the rotating column (40), and a connecting rod (38) is fixedly connected to the side of the connecting arm (39) away from the rotating column (40). The connecting rod (38) is fixedly installed through the groove. The housing (23) is rotatably connected to the mounting housing (23) via bearings; a second gear (51) is fixedly sleeved on the outside of the connecting rod (38), and a first side box (24) is fixedly installed on the side of the mounting housing (23) corresponding to the second gear (51); a second sliding plate (49) is provided inside the first side box (24), and a second toothed plate (50) is fixedly assembled on the side of the second sliding plate (49) near the second gear (51), and the second toothed plate (50) meshes with the second gear (51); two parallel second sliding rods (48) are fixedly installed inside the first side box (24), and the second sliding rods (48) pass through the second sliding plate (49) and are slidably connected to the second sliding plate (49); a first cylinder (25) is fixedly installed on the outside of the first side box (24), and the output end of the first cylinder (25) is fixedly connected to the second sliding plate (49).

4. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 3, characterized in that: Two slide rods (35) are fixedly installed at the positions of the connecting plate (36) between the micro-moving plate (11) and the mounting shell (23). The slide rods (35) pass through the connecting plate (36) and are slidably connected to the connecting plate (36).

5. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 1, characterized in that: The limb positioning mechanism includes several sets of limb fixing components, each including a sliding block (55); the top of the body (1) is symmetrically provided with two short sliding block grooves (12) and two long sliding block grooves (13), and the sliding block (55) is slidably assembled inside the short sliding block grooves (12) and the long sliding block grooves (13); the top and bottom of the two side walls of the sliding block (55) are rotatably connected to side support wheels (56) through bearings, and the side support wheels (56) respectively roll in contact with the top and bottom inner walls of the short sliding block grooves (12) and the long sliding block grooves (13); a column (72) is fixedly installed on the top of the sliding block (55), and a slip ring (63) is rotatably assembled on the top of the column (72), and a telescopic corrugated pipe (58) is fixedly connected to the top of the slip ring (63), and the top of the telescopic corrugated pipe (58) is fixedly... A top plate (59) is fixedly installed; a handle (61) is fixedly installed on the top of the top plate (59), and a silicone pressure block (60) is fixedly installed on the bottom of the top plate (59); a sliding column (62) is fixedly connected to the bottom of the top plate (59) and inside the telescopic corrugated pipe (58), and a guide column (64) is fixedly installed at the bottom end of the sliding column (62), the guide column (64) passes through the sliding block (55) and is slidably connected to the sliding block (55); a first spring (65) is sleeved on the outside of the sliding column (62), the top end of the first spring (65) is fixedly connected to the bottom of the sliding column (62), and the bottom end of the first spring (65) is fixedly connected to the inside of the sliding block (55); several full-circle slots are opened on the outside of the sliding column (62) in the vertical direction, and a limit component is provided inside the column body (72) on one side corresponding to the sliding column (62).

6. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 5, characterized in that: The limiting component includes an inner groove (69) opened inside the column (72), a locking block (17) is movably arranged inside the inner groove (69), the locking block (17) is engaged with the locking groove on the outside of the sliding column (62); a round rod (70) is fixedly connected to one side of the locking block (17), a second spring (71) is sleeved on the outside of the round rod (70), the two ends of the second spring (71) are fixedly connected to the locking block (17) and the inner wall of the inner groove (69) respectively; the end of the round rod (70) away from the locking block (17) extends to the outside of the column (72) and is slidably connected to the column (72), and a pull ring (57) is fixedly assembled on the outer end of the round rod (70).

7. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 6, characterized in that: The bottom of both the short sliding block groove (12) and the long sliding block groove (13) are evenly provided with several limiting holes (16), and the limiting holes (16) are inserted into the bottom of the guide post (64).

8. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 1, characterized in that: The head positioning mechanism includes a bottom shell (18) fixedly installed at the bottom of the examination bed (2). A lead screw (19) is rotatably connected inside the bottom shell (18) via a bearing. One end of the lead screw (19) extends to the outside of the bottom shell (18) and is fixedly fitted with a hand crank (20). A threaded plate (21) is threaded on the outside of the lead screw (19). The threaded plate (21) is slidably connected to the inner wall of the bottom shell (18). A U-shaped connecting plate (4) is fixedly connected to one side of the threaded plate (21). A bracket is fixedly installed on the outside of the U-shaped connecting plate (4). 66), a silicone positioning pad (67) is fixedly installed on the inner side of the card holder (66); a lifting lug (68) is fixedly provided on both sides of the card holder (66), and a short strap (5) is fixedly connected to one of the lifting lugs (68). The short strap (5) passes through the other lifting lug (68) and is fixedly fastened by Velcro wrapping; a limit rod (15) is fixedly installed on one side of the U-shaped connecting plate (4), and a sliding hole is opened on the inspection bed (2) corresponding to the position of the limit rod (15). The limit rod (15) extends into the sliding hole and slides through the sliding hole.

9. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 1, characterized in that: The inspection bed (2) is fixedly installed with a protective shell (3) at the bottom. The protective shell (3) is equipped with a slide (7) at the bottom. The slide (7) is slidably equipped with a slide rail (9) at the bottom. The slide rail (9) is fixedly installed with a base (8) at the bottom.

10. The adaptive body positioning and anti-movement auxiliary device for MRI examination according to claim 1, characterized in that: A baffle (14) is fixedly fitted on the side of the examination bed (2) away from the U-shaped connecting plate (4).

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