Magnetic resonance blood vessel wall scanning device with positioning assistance and positioning method

Abstract

The invention relates to the technical field of magnetic resonance blood vessel imaging, in particular to a magnetic resonance blood vessel wall scanning device with positioning assistance and a positioning method.The magnetic resonance blood vessel wall scanning device comprises a fixing device arranged on a scanning bed and used for fixing the head and scanning equipment, the bottom of the scanning bed is used for abutting against an abutting device on the top of the head, and the scanning bed is slidably connected with the scanning equipment. The fixing device comprises sliding rods arranged at the two ends of the scanning bed, sliding blocks are fixedly arranged at the bottoms of the sliding rods, sliding grooves sliding relative to the sliding blocks are formed in the scanning bed, and abutting rods used for abutting against the two sides of the lower jawbone of a patient are rotationally arranged at the ends of the sliding rods. A locking assembly used for locking the two abutting rods is arranged at the end, away from the sliding rod, of each abutting rod.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic resonance vascular imaging, and in particular to a magnetic resonance vascular wall scanning device and a positioning method with positioning assistance. Background Art

[0002] Magnetic resonance scanning devices use the principle of nuclear magnetic resonance, that is, using magnetic fields and radio frequency pulses to excite hydrogen atoms, and then reconstructing images of the internal structure of the human body by measuring the radio frequency signals released during their spin relaxation. Specifically, when the human body is in a strong magnetic field, the hydrogen nuclei (i.e., protons) in the body will be arranged along the direction of the magnetic field. At this time, when radio frequency pulses of a specific frequency are applied, the hydrogen nuclei will absorb energy and transition, and then release radio frequency signals when they lose energy. By measuring these signals, the density and distribution of hydrogen nuclei in various parts of the human body can be calculated, thereby reconstructing images of the internal structure of the human body.

[0003] When performing a scan, the scanning time will be determined according to the different conditions of different patients. Ordinary MRI examinations take 10 to 20 minutes, while patients with serious conditions may need to be examined for 30 to 40 minutes. If an enhanced scan is required, the time may be extended to 30 to 60 minutes. In addition, if there are many parts to be examined or the situation is more complicated, the examination time may also be significantly extended. Some patients may need up to 2 hours. Before the MRI scan, the doctor usually asks the patient to stay as still as possible, and during the MRI scan, the MRI equipment will make a huge noise, which will cause some discomfort to the patient's head. Therefore, if the patient's head moves accidentally, the image taken may be distorted or have artifacts. At this time, the doctor needs to guide the patient to readjust himself for reshooting, which will also increase the shooting time. The conventional fixation method is cumbersome and troublesome, or the patient is paralyzed by sedatives. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present application is to provide a magnetic resonance vascular wall scanning device and a positioning method with positioning assistance, which are used to solve the problem of accidental head movement of the patient during magnetic resonance imaging.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solution: a magnetic resonance vascular wall scanning device with positioning assistance, including a fixing device for fixing the head and a scanning device arranged on a scanning bed, a contact device for abutting the top of the head at the bottom of the scanning bed, and the scanning bed and the scanning device are slidably connected.

[0006] Furthermore, the fixing device includes a sliding rod arranged at both ends of the scanning bed, a sliding block is fixedly arranged at the bottom of the sliding rod, a sliding groove is opened on the scanning bed and slides relative to the sliding block, and abutment rods for abutting both sides of the patient's mandible are rotatably arranged at the end of the sliding rod, and a locking assembly for locking the two abutment rods is arranged on the end of the abutment rod away from the sliding rod.

[0007] By adopting the above technical solution, when conducting the test, after the patient lies on the scanning bed, the sliding blocks on both sides are adjusted to be close to each other, and then the abutment rod is rotated to abut against the patient's mandible, and the two abutment rods are connected together by the locking assembly. At the same time, the abutment device on the top of the head will abut against the patient's head. At this time, the top of the patient's head and lower jaw have been abutted and will not be able to shake up and down.

[0008] Furthermore, the locking assembly includes a first locking block rotatably connected to one end of an abutment rod, and the other end of the abutment rod is rotatably set on a second locking block, the first locking block is provided with a first semi-arc groove, and the second locking block is provided with a second semi-arc groove, the first semi-arc groove and the second semi-arc groove form a circular groove, a rotating shaft rotatably connected to the first locking block is provided in the middle of the first semi-arc groove, a locking rod is fixedly provided on the rotating shaft, sliding columns are rotatably set at both ends of the locking rod, and the sliding columns are slidably connected in the first semi-arc groove and the second semi-arc groove.

[0009] By adopting the above technical solution, when the abutment rod is pressed against the patient's lower jaw, the first locking block and the second locking block are close together. At this time, the locking rod on the first locking block is rotated to move the sliding columns on both sides to the first semi-arc groove and the second semi-arc groove respectively, thereby fixing the first locking block and the second locking block together.

[0010] Furthermore, a placement groove is provided at the bottom of the sliding column, an extrusion spring is arranged in the placement groove, the extrusion spring is fixedly connected in the sliding column, a locking column is fixedly provided at the bottom of the extrusion spring, and locking holes matching the locking column are provided on the first semi-arc groove and the second semi-arc groove.

[0011] By adopting the above technical solution, when the two sliding posts slide into the locking holes on both sides respectively, the locking posts will be squeezed into the locking holes as the spring squeezes, thereby further fixing the first locking block and the second locking block.

[0012] Furthermore, an unlocking rod is fixedly provided on the upper end of the locking column, the unlocking rod extends out of the locking column and is plugged into the locking column, and a pulling ring is fixedly provided on the unlocking rod.

[0013] By adopting the above technical solution, when unlocking is required, it is only necessary to pull the pulling ring to pull the unlocking rod so that the locking column is separated from the unlocking rod.

[0014] Furthermore, one side of the sliding groove is provided with a plurality of positioning holes opened on the scanning bed, and a retaining hole is opened on the same side of the sliding block, and a locking spring fixedly connected to the sliding block is arranged in the retaining hole, and the other end of the locking spring is fixedly connected with an inclined plate plugged into the positioning hole, and the inclined plate is provided with an inclined surface.

[0015] By adopting the above technical solution, when the sliding block slides, the inclined plate will move along with the positioning hole due to the inclined surface, and when the position is determined, the first locking block and the second locking block on the abutting rod are connected together.

[0016] Furthermore, a rectangular hole opened on the sliding block is arranged at the upper end of the retention hole, a pulling rod is fixedly arranged on the inclined plate, and the pulling rod is slidably connected in the rectangular hole.

[0017] By adopting the above technical solution, when movement in the reverse direction is required, the sliding block can be moved by only pulling the pulling rod in the rectangular hole to disengage the inclined plate from the positioning hole.

[0018] Furthermore, a flexible layer is fixedly provided on the upper surface of the abutting rod, and a damping sheet is fixedly provided at the connection between the sliding rod and the abutting rod.

[0019] Furthermore, the abutment device includes a vertical groove opened at the upper end of the sliding groove, an abutment block is slidably arranged in the vertical groove, an abutment plate is fixedly arranged on the upper end of the abutment block, both ends of the vertical groove are provided with fixed grooves opened on the sliding block, an abutment structure is arranged in the fixed groove, and the abutment structure includes a pair of abutment rods plugged into the fixed grooves, protrusions are fixedly arranged on the abutment rods, abutment springs are arranged between the abutment rods, and both ends of the abutment springs are fixedly connected to the protrusions.

[0020] By adopting the above technical solution, the abutment plate abuts against the top of the patient's head, and the distance is adjusted by sliding the vertical groove and the abutment block. When the distance is appropriate, the two abutment rods are compressed and then inserted into the fixed grooves at appropriate positions on both sides to abut the movement of the abutment block.

[0021] Furthermore, a magnetic resonance vascular wall positioning method with positioning assistance is applicable to the magnetic resonance vascular wall scanning device with positioning assistance described in the above technical solution, and comprises the following steps:

[0022] S1. The patient lies flat on the scanning bed with his head facing the scanning device, ensuring that the focus of the scanning device is on the expected scanning area of ​​the patient's head;

[0023] S2. The operator adjusts the position of the fixing device by adjusting the sliding rods at both ends of the scanning bed according to the size of the patient's head. The sliding blocks at the bottom of the sliding rods slide in the sliding grooves until the sliding blocks on both sides are close to the sides of the patient's head. The abutment rods are rotated to abut against the sides of the patient's mandible.

[0024] S3. Use the locking assembly to connect the two abutment rods together, bring the first locking block and the second locking block together, and then rotate the locking rod on the first locking block to make the sliding column slide into the first semi-arc groove and the second semi-arc groove respectively. When the sliding column reaches the position of the locking hole, the extrusion spring will push the locking column into the locking hole to achieve further fixation;

[0025] S4, adjusting the abutment device so that the abutment plate can abut against the top of the patient's head, which is achieved by sliding the abutment block in the vertical slot;

[0026] S5. After the abutment plate contacts the top of the patient's head, the operator compresses the two abutment rods and inserts them into the appropriate positions in the fixing grooves to prevent further movement of the abutment block;

[0027] S6. After the scan is completed, the operator needs to unlock the locking assembly and the abutment structure to release the patient's head from the fixture;

[0028] S7, first pull the pull ring to unlock the locking column, then separate the first locking block and the second locking block, then pull the pull rod in the rectangular hole to disengage the tilting plate from the positioning hole, and then slide the sliding block back to the initial position;

[0029] S8. Finally, the abutment rod is removed from the patient's mandible, and the sliding rod and the abutment device are adjusted back to the initial state.

[0030] By adopting the above technical solution, the patient first lies on the scanning bed, keeps the body lying flat, and the head faces the direction of the scanning device to ensure that the scanning focus is aligned with the expected scanning area. The operator then adjusts the position of the fixing device by adjusting the sliding rods at both ends of the scanning bed according to the size of the patient's head. The sliding block at the bottom of the sliding rod slides in the sliding groove until it is in the appropriate position, and then rotates the abutment rod to abut on both sides of the patient's mandible. The two abutment rods are connected together using a locking assembly, and the sliding column is made to slide into the semi-arc groove by rotating the locking rod and finally the locking column is pushed into the locking hole by the extrusion spring to achieve further fixation. At the same time, the abutment device is adjusted so that the abutment plate can abut against the top of the patient's head, which is achieved by sliding the abutment block in the vertical groove, and the abutment rod is inserted into the fixing groove at a suitable position to prevent the abutment block from moving. After the scanning is completed, the operator needs to unlock the locking assembly and the abutment structure, first pull the pull ring to unlock the locking column, separate the locking block, and then pull the pull rod in the rectangular hole to make the inclined plate disengage from the positioning hole, slide the sliding block back to the initial position, and finally remove the abutment rod from the patient's mandible and adjust the device back to the initial state.

[0031] In summary, the present application includes at least one of the following beneficial technical effects: first, by precisely adjusting the fixing device and the abutment device, the accuracy of the scan is significantly improved and the risk of image blurring due to head movement is reduced; second, the humanized design improves the patient's comfort and reduces discomfort during the scan; third, the application of sliding connections and locking components optimizes the scanning process and improves inspection efficiency; finally, the flexibility and adjustability of the device make it widely applicable to patients of different body shapes and age groups, as well as a variety of magnetic resonance examination items, demonstrating excellent application potential and clinical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure in the embodiment;

[0033] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0034] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0035] Figure 4 It is a schematic diagram of the scanning bed structure;

[0036] Figure 5 yes Figure 4 Section view along the cutting line AA;

[0037] Figure 6 yes Figure 5 Sectional view along the cutting line BB;

[0038] Figure 7Schematic diagram of the abutment structure in the embodiment.

[0039] Figure numerals: 1. scanning bed; 10. scanning device; 11. positioning hole; 2. sliding block; 20. locking hole; 21. sliding rod; 22. abutting rod; 23. first locking block; 231. second locking block; 24. first semi-arc groove; 241. second semi-arc groove; 25. rotating shaft; 26. locking rod; 27. sliding column; 28. unlocking rod; 29. ​​pulling rod; 3. abutting plate; 30. vertical groove; 301. fixed groove; 31. abutting block; 32. abutting rod; 33. abutting spring; 34. protrusion; 4. squeezing spring; 41. locking column; 42. pulling ring; 43. locking spring; 44. tilting plate; 45. rectangular hole. DETAILED DESCRIPTION

[0040] The present application is further described in detail below with reference to the accompanying drawings.

[0041] Example, see Figure 1 as well as Figure 2 , a magnetic resonance blood vessel wall scanning device with positioning assistance, comprising a fixing device for fixing the head and a scanning device 10 arranged on a scanning bed 1, an abutting device for abutting the top of the head at the bottom of the scanning bed 1, and the scanning bed 1 and the scanning device 10 are slidably connected. The fixing device comprises a sliding rod 21 arranged at both ends of the scanning bed 1, a sliding block 2 is fixedly arranged at the bottom of the sliding rod 21, a sliding groove for sliding relative to the sliding block 2 is provided on the scanning bed 1, an abutting rod 22 for abutting both sides of the mandible of the patient is rotatably arranged at the end of the sliding rod 21, and a locking assembly for locking the two abutting rods 22 is arranged at one end of the abutting rod 22 away from the sliding rod 21.

[0042] During the test, after the patient lies on the scanning bed 1, the sliding blocks 2 on both sides are adjusted to be close to each other, and then the abutment rod 22 is rotated to abut against the patient's mandible, and the two abutment rods 22 are connected together by the locking assembly. At the same time, the abutment device on the top of the head will abut against the patient's head. At this time, the top of the patient's head and lower jaw have been abutted and will not be able to shake up and down.

[0043] In this embodiment, refer to Figure 3 as well as Figure 4The locking assembly includes a first locking block 23 rotatably connected to the end of an abutting rod 22, and the end of the other abutting rod 22 is rotatably arranged on the second locking block 231. The first locking block 23 is provided with a first semi-arc groove 24, and the second locking block 231 is provided with a second semi-arc groove 241. The first semi-arc groove 24 and the second semi-arc groove 241 form a circular groove. A rotating shaft 25 rotatably connected to the first locking block 24 is arranged in the middle of the first semi-arc groove 24, and a locking rod 26 is fixedly arranged on the rotating shaft 25. Both ends of the locking rod 26 are rotatably arranged with sliding posts 27, and the sliding posts 27 are slidably connected in the first semi-arc groove 24 and the second semi-arc groove 241. When the abutting rod 22 is pressed against the patient's mandible, the first locking block 23 and the second locking block 231 are close together, and at this time, the locking rod 26 on the first locking block 23 is rotated to move the sliding posts 27 on both sides to the first semi-arc groove 24 and the second semi-arc groove 241 respectively, so as to fix the first locking block 23 and the second locking block 231 together.

[0044] In this embodiment, refer to Figure 5 as well as Figure 6 A placement groove is provided at the bottom of the sliding column 27, and an extrusion spring 4 is arranged in the placement groove. The extrusion spring 4 is fixedly connected in the sliding column 27, and a locking column 41 is fixedly provided at the bottom of the extrusion spring 4. The first semi-arc groove 24 and the second semi-arc groove 24 are both provided with locking holes 20 matching the locking column 41.

[0045] When the two sliding posts 27 slide into the locking holes 20 on both sides respectively, the locking posts 41 will be pressed into the locking holes 20 by the spring, thereby further fixing the first locking block 23 and the second locking block 231 .

[0046] An unlocking rod 28 is fixedly disposed on the upper end of the locking column 41 . The unlocking rod 28 extends out of the locking column 41 and is plugged into the locking column 41 . A pulling ring 42 is fixedly disposed on the unlocking rod 28 .

[0047] When unlocking is required, it is only necessary to pull the pulling ring 42 to pull the unlocking rod 28 so that the locking column 41 is separated from the unlocking rod 28 .

[0048] One side of the sliding groove is provided with a plurality of positioning holes 11 opened on the scanning bed 1, and a retaining hole is opened on the same side of the sliding block 2, in which a locking spring 43 fixedly connected to the sliding block 2 is arranged, and the other end of the locking spring 43 is fixedly connected to an inclined plate 44 plugged into the positioning hole 11, and an inclined surface is opened on the inclined plate 44.

[0049] When the sliding block 2 slides, the inclined plate 44 will move along with the positioning hole 11 due to the inclined surface. When the position is determined, the first locking block 23 and the second locking block 231 on the abutting rod 22 are connected together.

[0050] A rectangular hole 45 is provided on the upper end of the retention hole and is opened on the sliding block 2. A pull rod 29 is fixedly provided on the inclined plate 44, and the pull rod 29 is slidably connected in the rectangular hole 45. When it is necessary to move in the opposite direction, the sliding block 2 can be moved by only pulling the pull rod 29 in the rectangular hole 45 to disengage the inclined plate 44 from the positioning hole 11.

[0051] A flexible layer is fixedly provided on the upper surface of the abutting rod 22 , and a damping sheet is fixedly provided at the connection between the sliding rod 21 and the abutting rod 22 .

[0052] Reference Figure 7 The abutment device includes a vertical groove 30 opened at the upper end of the sliding groove, an abutment block 31 is slidably arranged in the vertical groove 30, an abutment plate 3 is fixedly arranged on the upper end of the abutment block 31, both ends of the vertical groove 30 are provided with fixed grooves 301 opened on the sliding block 2, and an abutment structure is arranged in the fixed groove 301. The abutment structure includes a pair of abutment rods 32 plugged into the fixed grooves 301, and protrusions 34 are fixedly arranged on the abutment rods 32. Abutment springs 33 are arranged between the abutment rods 32, and both ends of the abutment springs 33 are fixedly connected to the protrusions 34.

[0053] The abutment plate 3 abuts against the top of the patient's head, and the distance is adjusted by sliding the vertical slot 30 and the abutment block 31. When the distance is appropriate, the two abutment rods 22 are compressed and then inserted into the fixed slots 301 at appropriate positions on both sides to abut against the movement of the abutment block 31.

[0054] The magnetic resonance blood vessel wall positioning method with positioning assistance is applicable to the magnetic resonance blood vessel wall scanning device with positioning assistance described in the above technical solution, and comprises the following steps:

[0055] S1. The patient lies on the scanning bed 1, keeps the body lying flat, and the head faces the direction of the scanning device 10, ensuring that the focus of the scanning device 10 is aligned with the expected scanning area of ​​the patient's head;

[0056] S2. The operator adjusts the position of the fixing device by adjusting the sliding rods 21 at both ends of the scanning bed 1 according to the size of the patient's head. The sliding blocks 2 at the bottom of the sliding rods 21 slide in the sliding grooves until the sliding blocks 2 on both sides are close to the sides of the patient's head. The abutment rods 22 are rotated to abut against the sides of the patient's mandible.

[0057] S3, use the locking assembly to connect the two abutment rods 22 together, bring the first locking block 23 and the second locking block 231 together, then rotate the locking rod 26 on the first locking block 23, so that the sliding column 27 slides into the first semi-arc groove 24 and the second semi-arc groove 241 respectively, when the sliding column 27 reaches the position of the locking hole 20, the extrusion spring 4 will push the locking column 41 into the locking hole 20 to achieve further fixation;

[0058] S4, adjusting the abutment device so that the abutment plate 3 can abut against the top of the patient's head, which is achieved by sliding the abutment block 31 in the vertical slot 30;

[0059] S5. After the abutment plate 3 contacts the top of the patient's head, the operator compresses the two abutment rods 32 and inserts them into appropriate positions in the fixing slots 301 to prevent the abutment block 31 from further moving;

[0060] S6. After the scan is completed, the operator needs to unlock the locking assembly and the abutment structure to release the patient's head from the fixture;

[0061] S7, first pull the pull ring 42 to unlock the locking column 41, then separate the first locking block 23 and the second locking block 231, then pull the pull rod 29 in the rectangular hole 45 to make the inclined plate 44 disengage from the positioning hole 11, and then slide the sliding block 2 back to the initial position;

[0062] S8. Finally, the abutment rod 22 is removed from the mandible of the patient, and the sliding rod 21 and the abutment device are adjusted back to the initial state.

[0063] The patient first lies on the scanning bed 1, keeping the body lying flat with the head facing the scanning device 10, ensuring that the scanning focus is aligned with the expected scanning area. The operator then adjusts the position of the fixing device by adjusting the sliding rods 21 at both ends of the scanning bed 1 according to the size of the patient's head. The sliding block 2 at the bottom of the sliding rod 21 slides in the sliding groove until it reaches a suitable position, and then the abutment rod 22 is rotated to abut against both sides of the patient's mandible. The two abutment rods 22 are connected together using a locking assembly, and the sliding column 27 is made to slide into the semi-arc groove by rotating the locking rod 26, and finally the locking column 41 is pushed into the locking hole 20 by the extrusion spring 4 to achieve further fixation. At the same time, the abutment device is adjusted so that the abutment plate 3 can abut against the top of the patient's head, which is achieved by sliding the abutment block 31 in the vertical groove 30, and the abutment rod 32 is inserted into the fixing groove 301 at a suitable position to prevent the abutment block 31 from moving. After the scan is completed, the operator needs to unlock the locking assembly and the abutment structure, first pull the pulling ring 42 to unlock the locking column 41, separate the locking block, then pull the pulling rod 29 in the rectangular hole 45 to disengage the inclined plate 44 from the positioning hole 11, slide the sliding block 2 back to the initial position, and finally remove the abutment rod 22 from the patient's mandible and adjust the device back to the initial state.

[0064] Specific usage process: The patient lies on the scanning bed 1, keeping the body lying flat, with the head facing the direction of the scanning device 10. The operator first checks the integrity of the scanning bed 1, the sliding rod 21, the sliding block 2, the abutment rod 22, the locking assembly and the abutment device, and confirms that they are in normal working condition. Then, according to the size of the patient's head, the operator adjusts the sliding rods 21 at both ends of the scanning bed 1 so that the sliding blocks 2 at the bottom of the sliding rod 21 slide in the sliding groove until the sliding blocks 2 on both sides are close to the sides of the patient's head. Next, the operator rotates the abutment rod 22 so that it abuts against the two sides of the patient's mandible. The flexible layer on the upper surface of the abutment rod 22 provides a comfortable sense of contact.

[0065] The two abutment rods 22 are connected together using a locking assembly. The operator brings the first locking block 23 and the second locking block 231 together, and then rotates the locking rod 26 on the first locking block 23 to slide the sliding column 27 into the first semi-arc groove 24 and the second semi-arc groove 241 respectively. When the sliding column 27 reaches the position of the locking hole 20, the compression spring 4 pushes the locking column 41 into the locking hole 20 to achieve further fixation. At this time, the top of the patient's head and the lower jaw have been abutted and cannot shake up and down.

[0066] Next, the operator adjusts the abutment device so that the abutment plate 3 can abut the top of the patient's head. The distance is adjusted by sliding the abutment block 31 in the vertical slot 30. When the distance is appropriate, the operator compresses the two abutment rods 32 and inserts them into the appropriate position in the fixed slot 301 to prevent further movement of the abutment block 31. The protrusion 34 on the abutment rod 32 and the compression spring 4 ensure that the abutment rod 32 is stably inserted into the fixed slot 301.

[0067] A plurality of positioning holes 11 are provided on one side of the sliding groove, and the operator can lock the position of the sliding block 2 by inserting the tilting plate 44 into the positioning holes 11 to ensure that the patient's head remains fixed during the scanning process. After everything is ready, the operator starts the scanning device 10 to perform a magnetic resonance vascular wall scan on the patient. During the scanning process, the patient needs to remain still and avoid moving or coughing to ensure image quality.

[0068] After the scan is completed, the operator needs to unlock the locking assembly and the abutment structure. First, pull the pull ring 42 to unlock the locking column 41, and then separate the first locking block 23 and the second locking block 231. Next, pull the pull rod 29 in the rectangular hole 45 to disengage the tilting plate 44 from the positioning hole 11. Then, slide the sliding block 2 back to the initial position. Finally, the operator removes the abutment rod 22 from the patient's mandible, adjusts the sliding rod 21 and the abutment device back to the initial state, and releases the patient's head.

[0069] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A magnetic resonance blood vessel wall scanning device with positioning assistance, characterized in that: It comprises a fixing device for fixing the head and a scanning device (10) arranged on a scanning bed (1), a contact device for contacting the top of the head at the bottom of the scanning bed (1), and the scanning bed (1) and the scanning device (10) are slidably connected.

2. The magnetic resonance blood vessel wall scanning device with positioning assistance according to claim 1, characterized in that: The fixing device comprises a sliding rod (21) arranged at both ends of the scanning bed (1); a sliding block (2) is fixedly arranged at the bottom of the sliding rod (21); a sliding groove for sliding relative to the sliding block (2) is provided on the scanning bed (1); abutment rods (22) for abutting both sides of the bottom of the patient's mandible are rotatably arranged at the ends of the sliding rod (21); and a locking assembly for locking the two abutment rods (22) is arranged at one end of the abutment rod (22) away from the sliding rod (21).

3. The magnetic resonance blood vessel wall scanning device with positioning assistance according to claim 2, characterized in that: The locking assembly comprises a first locking block (23) rotatably connected to the end of an abutting rod (22); the other end of the abutting rod (22) is rotatably arranged on a second locking block (231); the first locking block (23) is provided with a first semi-arc groove (24); the second locking block (231) is provided with a second semi-arc groove (241); the first semi-arc groove (24) and the second semi-arc groove (241) form a circular groove; a rotating shaft (25) rotatably connected to the first locking block (24) is arranged in the middle of the first semi-arc groove (24); a locking rod (26) is fixedly arranged on the rotating shaft (25); sliding columns (27) are rotatably arranged at both ends of the locking rod (26); the sliding columns (27) are slidably connected in the first semi-arc groove (24) and the second semi-arc groove (241).

4. The magnetic resonance blood vessel wall scanning device with positioning assistance according to claim 3, characterized in that: The bottom of the sliding column (27) is provided with a placement groove, a pressing spring (4) is arranged in the placement groove, the pressing spring (4) is fixedly connected in the sliding column (27), a locking column (41) is fixedly arranged at the bottom of the pressing spring (4), and the first semi-arc groove (24) and the second semi-arc groove (241) are both provided with locking holes (20) matching the locking column (41).

5. The magnetic resonance blood vessel wall scanning device with positioning assistance according to claim 4, characterized in that: An unlocking rod (28) is fixedly arranged on the upper end of the locking column (41), the unlocking rod (28) extends out of the locking column (41) and is plugged into the locking column (41), and a pulling ring (42) is fixedly arranged on the unlocking rod (28).

6. The magnetic resonance blood vessel wall scanning device with positioning assistance according to claim 2, characterized in that: A plurality of groups of positioning holes (11) are provided on one side of the sliding groove and are opened on the scanning bed (1). A retaining hole is provided on the same side of the sliding block (2). A locking spring (43) fixedly connected to the sliding block (2) is provided in the retaining hole. An inclined plate (44) plugged into the positioning hole (11) is fixedly connected to the other end of the locking spring (43). The inclined plate (44) is provided with an inclined surface.

7. The magnetic resonance blood vessel wall scanning device with positioning assistance according to claim 6, characterized in that: The upper end of the retention hole is provided with a rectangular hole (45) opened on the sliding block (2), and a pulling rod (29) is fixedly provided on the inclined plate (44), and the pulling rod (29) is slidably connected in the rectangular hole (45).

8. The magnetic resonance blood vessel wall scanning device with positioning assistance according to claim 2, characterized in that: A flexible layer is fixedly provided on the upper surface of the abutment rod (22), and a damping sheet is fixedly provided at the connection between the sliding rod (21) and the abutment rod (22).

9. The magnetic resonance blood vessel wall scanning device with positioning assistance according to claim 1, characterized in that: The abutment device comprises a vertical groove (30) provided at the upper end of the sliding groove, an abutment block (31) is slidably arranged in the vertical groove (30), an abutment plate (3) is fixedly arranged at the upper end of the abutment block (31), both ends of the vertical groove (30) are provided with fixed grooves (301) provided on the sliding block (2), an abutment structure is arranged in the fixed groove (301), the abutment structure comprises a pair of abutment rods (32) plugged into the fixed grooves (301), protrusions (34) are fixedly arranged on the abutment rods (32), abutment springs (33) are arranged between the abutment rods (32), and both ends of the abutment springs (33) are fixedly connected to the protrusions (34).

10. A magnetic resonance blood vessel wall positioning method with positioning assistance, applicable to the magnetic resonance blood vessel wall scanning device with positioning assistance as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The patient lies on the scanning bed (1), keeps the body lying flat, and faces the head towards the scanning device (10), ensuring that the focus of the scanning device (10) is aligned with the expected scanning area of ​​the patient's head; S2. The operator adjusts the position of the fixing device by adjusting the sliding rods (21) at both ends of the scanning bed (1) according to the size of the patient's head. The sliding blocks (2) at the bottom of the sliding rods (21) slide in the sliding grooves until the sliding blocks (2) on both sides are close to both sides of the patient's head. The abutment rods (22) are rotated to abut against both sides of the patient's mandible. S3, using a locking assembly to connect the two abutting rods (22) together, placing the first locking block (23) and the second locking block (231) close together, and then rotating the locking rod (26) on the first locking block (23) to make the sliding column (27) slide into the first semi-arc groove (24) and the second semi-arc groove (241) respectively, when the sliding column (27) reaches the position of the locking hole (20), the extrusion spring (4) will push the locking column (41) into the locking hole (20) to achieve further fixation; S4, adjusting the abutment device so that the abutment plate (3) can abut against the top of the patient's head, which is achieved by sliding the abutment block (31) in the vertical slot (30); S5. After the abutment plate (3) contacts the top of the patient's head, the operator compresses the two abutment rods (32) and inserts them into appropriate positions in the fixing slots (301) to prevent the abutment block (31) from further moving; S6. After the scan is completed, the operator needs to unlock the locking assembly and the abutment structure to release the patient's head from the fixture; S7, first pull the pulling ring (42) to unlock the locking column (41), then separate the first locking block (23) and the second locking block (231), then pull the pulling rod (29) in the rectangular hole (45) to make the inclined plate (44) disengage from the positioning hole (11), and then slide the sliding block (2) back to the initial position; S8. Finally, the abutment rod (22) is removed from the patient's mandible, and the sliding rod (21) and the abutment device are adjusted back to the initial state.

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