A head positioning device for PET / MR

Abstract

The present invention belongs to the technical field of head positioning for PET / MR, and specifically refers to a head positioning device for PET / MR, including a positioning arc plate, a headrest type fixing mechanism and a reflux type mist elimination mechanism, wherein the headrest type fixing mechanism is arranged on the positioning arc plate, the reflux type mist elimination mechanism is arranged on the headrest type fixing mechanism, the headrest type fixing mechanism includes a soft pillow mechanism and a head support mechanism, the soft pillow mechanism is arranged on the upper wall of the positioning arc plate, and the head support mechanism is arranged on the side walls at both ends of the positioning arc plate. The present invention provides a head positioning device for PET / MR that can independently and adjustable clamp the patient's head and face, can disinfect the contact surface between the positioning structure and the patient after use, and can provide soundproof protection for the patient's ears.

Description

Technical Field

[0001] The invention belongs to the technical field of head positioning of PET / MR, and in particular refers to a head positioning device for PET / MR. Background Art

[0002] Head positioning for PET / MR is critical in advanced medical imaging examinations. The position of the head needs to be accurately fixed to ensure the quality and accuracy of the image. Usually, a triangular pad of appropriate size is placed under the head to ensure that the center of the skull and the center of the coil are consistent.

[0003] The existing PET / MR head positioning devices have the following problems:

[0004] 1. Most of the existing head positioning structures are not adjustable as a whole and do not have the ability to clamp independently, which can easily cause great pressure on the patient's head, affect the patient's breathing and relaxation state, and thus reduce the patient's comfort during the examination;

[0005] 2. The traditional head positioning structure does not have the function of disinfection. Since PET / MR examination usually takes a long time, the patient's head will produce sweat due to heat, and the sweat will remain on the surface of the positioning structure, which will affect the subsequent use of the positioning structure;

[0006] 3. The existing PET / MR head positioning structure does not have the function of protecting the patient's ears and cannot ensure the safety during the examination. Summary of the invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a head positioning device for PET / MR that can independently and adjustably clamp the patient's head and face, can disinfect the contact surface between the positioning structure and the patient after use, and can provide soundproofing protection for the patient's ears.

[0008] The technical solution adopted in this scheme is as follows: This scheme proposes a head positioning device for PET / MR, including a positioning arc plate, a headrest type fixing mechanism and a reflux type mist elimination mechanism, the headrest type fixing mechanism is arranged on the positioning arc plate, the reflux type mist elimination mechanism is arranged on the headrest type fixing mechanism, the headrest type fixing mechanism includes a soft pillow mechanism and a head support mechanism, the soft pillow mechanism is arranged on the upper wall of the positioning arc plate, the head support mechanism is arranged on the side walls at both ends of the positioning arc plate, the reflux type mist elimination mechanism includes a diversion mechanism, a spray mechanism and a flow control mechanism, the diversion mechanism is arranged on the side wall of the head support mechanism, the spray mechanism is arranged on the upper wall of the diversion mechanism, and the flow control mechanism is arranged on the bottom wall of the diversion mechanism.

[0009] As a further preferred embodiment of the present invention, the soft pillow mechanism includes an arc groove, a main support tube, an arc plate, an arc airbag, a pillow plate, a pressure sensor and a guide port. The arc groove is arranged on the upper wall of the positioning arc plate, and the arc groove is arranged through. A plurality of groups of main support tubes are arranged on the inner wall of the arc groove, the arc plate is arranged on the upper wall of the main support tube, the arc airbag is arranged on the upper wall of the arc plate, the pillow plate is arranged on the upper wall of the arc airbag, the pressure sensor is arranged on the side wall of the arc airbag, the power end of the pressure sensor is arranged through the inner wall of the arc airbag, and the guide port is arranged between the main support tube, the arc plate and the arc airbag; the head The resisting mechanism includes a liquid storage cylinder, a guide block, a guide port, a guide magnetic column, a push head, a retraction spring and a control column electromagnet. Multiple groups of the liquid storage cylinders are arranged at both ends of the positioning arc plate. The main support tube passes through the positioning arc plate and is connected to the liquid storage cylinder. The guide block is arranged on the side wall of the liquid storage cylinder. The guide blocks are relatively arranged. The guide port is arranged between the guide block and the liquid storage cylinder. The guide magnetic column is slidably arranged inside the guide port. The push head is arranged on the side of the guide magnetic column away from the guide port. The retraction spring is arranged between the guide block and the push head outside the guide magnetic column. The control column electromagnet passes through the side of the liquid storage cylinder away from the push head.

[0010] When in use, the positioning arc plate is fixed on the examination bed plate of the PETMR device. The arc-shaped airbag is in an inflated state in the initial state. Disinfectant is injected into the main support tube, the arc-shaped airbag and the liquid storage cylinder. The patient's head is placed inside the positioning arc plate, and the back of the patient's head fits against the upper wall of the pillow plate. As the patient lies flat on the examination bed, the pressure exerted by the patient's head on the arc-shaped airbag increases. After the arc-shaped airbag under the pillow plate is squeezed, the liquid in the squeezed part flows into the liquid storage cylinder through the main support tube. The pressure inside the liquid storage cylinder increases, and the guide magnetic column is driven to slide along the guide port through the deformation of the retraction spring. The guide magnetic column drives the top head to move relatively against the patient's head. The part of the arc-shaped airbag that is not squeezed fits against the patient's face due to the internal filling liquid. The pressure sensor monitors the pressure value inside the squeezed arc-shaped airbag in real time through the detection end. When the pressure value inside the squeezed arc-shaped airbag detected by the pressure sensor is small and does not meet the operator's requirements, the liquid inside the arc-shaped airbag is consumed, and the operator replenishes liquid into the arc-shaped airbag.

[0011] When the guide magnetic column extends a long distance out of the guide block, the squeezing force of the ram on the patient's head is greater. In order to avoid injury to the patient, the control column electromagnet is energized to generate magnetism. The control column electromagnet and the guide magnetic column are set with opposite poles. The control column electromagnet is fixed on the side wall of the liquid storage cylinder and absorbs the guide magnetic column by magnetic force. The guide magnetic column drives the ram to reduce the squeezing of the patient's head through the elastic deformation of the retraction spring, thereby completing the positioning of the patient's head.

[0012] Preferably, the diversion mechanism includes an electric valve, a series pipe, a diversion pipe, an exhaust valve and a one-way air intake valve, the electric valve is connected and arranged on the upper wall of the liquid storage cylinder, the series pipe is connected and arranged between the electric valves, the diversion pipe spans the positioning arc plate and is connected and arranged between the series pipes, the exhaust valve is symmetrically arranged at both ends of the diversion pipe, the exhaust valve is connected and arranged at one end of the diversion pipe close to the liquid storage cylinder, and the one-way air intake valve is connected and arranged on the bottom wall of the diversion pipe; the spray mechanism includes an atomizing pipe and an atomizer, the atomizer is arranged on the upper wall of the diversion pipe, the atomizer extraction end is penetrated and arranged inside the diversion pipe, and the atomizing pipe is arranged at the atomizing end of the atomizer; the flow control mechanism includes a groove, a rebound magnet and a fixed electromagnet, the groove is arranged on the side wall of the pillow plate, the groove is a through setting, the rebound magnet is arranged inside the groove, the fixed electromagnet penetrates the arc plate and is arranged on the bottom wall of the arc-shaped airbag, and the rebound magnet and the fixed electromagnet are arranged opposite to each other.

[0013] When in use, in the initial state, the main support tube, the arc-shaped airbag and the liquid storage cylinder are filled with liquid, the electric valve is turned on, and the liquid squeezed in the arc-shaped airbag enters the shunt tube through the main support tube and the series tube, which can shunt the liquid in the arc-shaped airbag and the liquid storage cylinder to prevent the arc-shaped airbag and the top head from over-positioning the patient's head. When liquid enters the shunt tube, the air in the shunt tube is discharged through the exhaust valve;

[0014] When the patient test is completed, the arc-shaped airbag needs to be disinfected after use to facilitate subsequent use by patients. The controller controls the fixed electromagnet to start, and the fixed electromagnet is energized to generate magnetism. The fixed electromagnet and the rebound magnet are set with opposite poles. The fixed electromagnet is fixed to the bottom wall of the arc-shaped plate and absorbs the rebound magnet by magnetic force. After the arc-shaped airbag at the position of the pillow plate is squeezed, the rebound magnet and the fixed electromagnet are driven to maintain a minimum distance between them. When the patient leaves the upper wall of the pillow plate, the arc-shaped airbag is elastically reset, and the rebound reset force of the arc-shaped airbag is greater than the magnetic field strength between the rebound magnet and the fixed electromagnet. The fixed electromagnet controls the rebound speed of the arc-shaped airbag by magnetically absorbing the rebound magnet.

[0015] The controller controls the nebulizer to start, and the nebulizer draws the disinfectant flowing into the shunt tube through the nebulizer tube. The disinfectant is sprayed vertically to the top of the arc-shaped airbag after being atomized by the nebulizer. When the arc-shaped airbag is reset, it absorbs the disinfectant inside the shunt tube through the adsorption force generated, and the outside air enters the shunt tube through the one-way air inlet valve. The shunt tube is filled with air, and the disinfectant inside the shunt tube flows back to the liquid storage cylinder through the series pipe. The disinfectant inside the liquid storage cylinder flows into the arc-shaped airbag through the main support pipe and the guide port. After the disinfectant inside the shunt tube flows out, the nebulizer no longer generates disinfectant mist. At this time, the mist above the arc-shaped airbag falls onto the upper wall of the arc-shaped airbag under the action of gravity, thereby completing the disinfection operation of the contact surface between the arc-shaped airbag and the patient.

[0016] Specifically, a controller is provided on the side wall of the positioning arc plate.

[0017] Wherein, the controller is electrically connected to the pressure sensor, the atomizer, the fixed electromagnet and the control column electromagnet respectively.

[0018] Preferably, the model of the controller is HAD-SC200.

[0019] The beneficial effects achieved by adopting the above structure are as follows:

[0020] Compared with the prior art, this solution adopts a combination of a headrest type fixing mechanism and a reflux type mist elimination mechanism. Under the coordinated use of the soft pillow mechanism, the head support mechanism, the shunt mechanism, the spray mechanism and the flow control mechanism, the flow and reflux movement of the liquid can, on the one hand, dynamically position the patient's head, and on the other hand, disinfect the contact surface between the patient and the arc-shaped airbag. Secondly, the setting of the control column electromagnet and the shunt pipe can adjust the clamping force of the head and the arc-shaped airbag on the patient's head. When the clamping force of the head on the patient is large, the control column electromagnet drives the head to reduce the pressure through magnetic adsorption of the guide magnetic column. The force against the patient's head is light. When the clamping force on the patient's face is large, the electric valve is turned on to transport the liquid in the squeezed part of the arc-shaped airbag to the shunt tube for storage, thereby completing the dynamic positioning of the patient's head. As the patient lies flat on the examination bed, the pressure applied by the patient's head to the arc-shaped airbag increases. After the arc-shaped airbag under the pillow plate is squeezed, the liquid in the squeezed part flows into the liquid storage cylinder through the main support tube. The pressure inside the liquid storage cylinder increases, and the deformation of the retraction spring drives the guide magnetic column to slide along the guide port, and the guide magnetic column drives the head to move relative to the patient's head. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0022] Figure 2 This is a bottom-up stereogram of the scheme;

[0023] Figure 3 This is the main view of this scheme;

[0024] Figure 4 This is a side view of the scheme;

[0025] Figure 5 This is a top view of the scheme;

[0026] Figure 6 for Figure 4 AA section view of the part;

[0027] Figure 7 for Figure 8 A cross-sectional view of the BB portion;

[0028] Figure 8 for Figure 1 A magnified structural view of part I;

[0029] Fig. 9 for Figure 2 A magnified structural view of Part II.

[0030] Among them, 1. positioning arc plate, 2. headrest type fixing mechanism, 3. soft pillow mechanism, 4. arc groove, 5. main support tube, 6. arc plate, 7. arc airbag, 8. pillow plate, 9. pressure sensor, 10. headbutt mechanism, 11. liquid storage cylinder, 12. guide block, 13. guide port, 14. guide magnetic column, 15. top head, 16. retraction spring, 17. reflux type mist elimination mechanism, 18. diversion mechanism, 19. electric valve, 20. series pipe, 21. diversion pipe, 22. spray mechanism, 23. atomization pipe, 24. atomizer, 25. flow control mechanism, 26. groove, 27. rebound magnet, 28. fixed electromagnet, 29. controller, 30. control column electromagnet, 31. exhaust valve, 32. one-way air intake valve, 33. guide port.

[0031] The accompanying drawings are used to provide further understanding of the present scheme and constitute a part of the specification. Together with the embodiments of the present scheme, they are used to explain the present scheme and do not constitute a limitation on the present scheme. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the present scheme will be clearly and completely described below in conjunction with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are only part of the embodiments of the present scheme, not all of the embodiments; based on the embodiments in the present scheme, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present scheme.

[0033] In the description of this scheme, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this scheme.

[0034] like Figure 1-Figure 9As shown, the present scheme proposes a head positioning device for PET / MR, comprising a positioning arc plate 1, a headrest type fixing mechanism 2 and a reflux type mist elimination mechanism 17, wherein the headrest type fixing mechanism 2 is arranged on the positioning arc plate 1, and the reflux type mist elimination mechanism 17 is arranged on the headrest type fixing mechanism 2, the headrest type fixing mechanism 2 comprises a soft pillow mechanism 3 and a head support mechanism 10, wherein the soft pillow mechanism 3 is arranged on the upper wall of the positioning arc plate 1, and the head support mechanism 10 is arranged on the side walls at both ends of the positioning arc plate 1, and the reflux type mist elimination mechanism 17 comprises a diverter mechanism 18, a spray mechanism 22 and a flow control mechanism 25, wherein the diverter mechanism 18 is arranged on the side wall of the head support mechanism 10, the spray mechanism 22 is arranged on the upper wall of the diverter mechanism 18, and the flow control mechanism 25 is arranged on the bottom wall of the diverter mechanism 18.

[0035] The soft pillow mechanism 3 includes an arc groove 4, a main support tube 5, an arc plate 6, an arc airbag 7, a pillow plate 8, a pressure sensor 9 and a guide port 33. The arc groove 4 is arranged on the upper wall of the positioning arc plate 1, and the arc groove 4 is arranged through. Multiple groups of main support tubes 5 are arranged on the inner wall of the arc groove 4, the arc plate 6 is arranged on the upper wall of the main support tube 5, the arc airbag 7 is arranged on the upper wall of the arc plate 6, and the pillow plate 8 is arranged on the upper wall of the arc airbag 7. The pressure sensor 9 is arranged on the side wall of the arc airbag 7, and the power end of the pressure sensor 9 is arranged through the inner wall of the arc airbag 7. The guide port 33 is arranged between the main support tube 5, the arc plate 6 and the arc airbag 7; the head-butting mechanism 10 includes a liquid storage cylinder 11, a guide block 12, a guide port 13, guide magnetic column 14, top head 15, retraction spring 16 and control column electromagnet 30, multiple groups of liquid storage cylinders 11 are arranged at both ends of the positioning arc plate 1, the main support tube 5 passes through the positioning arc plate 1 and is connected to the liquid storage cylinder 11, the guide block 12 is arranged on the side wall of the liquid storage cylinder 11, the guide block 12 is relatively arranged, the guide port 13 is arranged between the guide block 12 and the liquid storage cylinder 11, the guide magnetic column 14 is slidably arranged inside the guide port 13, the top head 15 is arranged on the side of the guide magnetic column 14 away from the guide port 13, the retraction spring 16 is arranged between the guide block 12 and the top head 15 on the outside of the guide magnetic column 14, and the control column electromagnet 30 is arranged through the side of the liquid storage cylinder 11 away from the top head 15.

[0036] The diverter mechanism 18 includes an electric valve 19, a series pipe 20, a diverter pipe 21, an exhaust valve 31 and a one-way air intake valve 32. The electric valve 19 is connected to the upper wall of the liquid storage cylinder 11, the series pipe 20 is connected between the electric valves 19, the diverter pipe 21 spans the positioning arc plate 1 and is connected between the series pipes 20, the exhaust valve 31 is symmetrically arranged at both ends of the diverter pipe 21, the exhaust valve 31 is connected to one end of the diverter pipe 21 close to the liquid storage cylinder 11, and the one-way air intake valve 32 is connected to the bottom wall of the diverter pipe 21; the spray mechanism 22 includes Atomizer tube 23 and atomizer 24, the atomizer 24 is arranged on the upper wall of the shunt tube 21, the extraction end of the atomizer 24 is arranged through the inside of the shunt tube 21, and the atomizer tube 23 is arranged at the atomization end of the atomizer 24; the flow control mechanism 25 includes a groove 26, a rebound magnet 27 and a fixed electromagnet 28, the groove 26 is arranged on the side wall of the pillow plate 8, the groove 26 is a through setting, the rebound magnet 27 is arranged inside the groove 26, the fixed electromagnet 28 penetrates the arc plate 6 and is arranged on the bottom wall of the arc airbag 7, and the rebound magnet 27 and the fixed electromagnet 28 are arranged opposite to each other.

[0037] A controller 29 is disposed on the side wall of the positioning arc plate 1 .

[0038] The controller 29 is electrically connected to the pressure sensor 9 , the atomizer 24 , the fixed electromagnet 28 and the column control electromagnet 30 , respectively.

[0039] Preferably, the model of the controller 29 is HAD-SC200.

[0040] When in use, the positioning arc plate 1 is fixed on the examination bed plate of the PET / MR device. The arc airbag 7 is in an inflated state in the initial state. Disinfectant is injected into the main support tube 5, the arc airbag 7 and the liquid storage cylinder 11. The patient's head is placed inside the positioning arc plate 1, and the back of the patient's head fits against the upper wall of the pillow plate 8. As the patient lies flat on the examination bed, the pressure exerted by the patient's head on the arc airbag 7 increases. After the arc airbag 7 under the pillow plate 8 is squeezed, the liquid in the squeezed part flows into the liquid storage cylinder 11 through the main support tube 5. The pressure inside the liquid storage cylinder 11 increases, and the guide magnetic column 14 slides along the guide port 13 through the deformation of the retraction spring 16. The guide magnetic column 14 drives the top head 15 to move relatively against the patient's head. The part of the arc airbag 7 that is not squeezed fits against the patient's face and ears due to the internal filling liquid. The noise generated by the PET / MR device is reduced by the liquid filled in the arc airbag 7, thereby protecting the patient's ears to a certain extent.

[0041] When the guide magnetic column 14 extends a long distance from the inside of the guide block 12, the squeezing force of the head 15 on the patient's head is relatively large. To prevent the patient from being injured, the controller 29 controls the control column electromagnet 30 to start. The control column electromagnet 30 is energized to generate magnetism. The control column electromagnet 30 and the guide magnetic column 14 are arranged with opposite poles. The control column electromagnet 30 is fixed to the side wall of the liquid storage cylinder 11 and absorbs the guide magnetic column 14 by magnetic force. The guide magnetic column 14 drives the head 15 to reduce the squeezing of the patient's head through the elastic deformation of the retraction spring 16, thereby completing the positioning of the patient's head.

[0042] The controller 29 controls the electric valve 19 to start, and the electric valve 19 is turned on. The liquid in the squeezed part of the arc-shaped airbag 7 enters the shunt tube 21 through the main support tube 5 and the series tube 20. The shunt tube 21 can shunt the liquid in the arc-shaped airbag 7 and the liquid storage cylinder 11 to prevent the arc-shaped airbag 7 and the top head 15 from over-positioning the patient's head. When liquid enters the shunt tube 21, the air in the shunt tube 21 is discharged through the exhaust valve 31, and the distance between the rebound magnet 27 and the fixed electromagnet 28 is the shortest distance. The controller 29 controls the electric valve 19 to close. In the blocking stage of the electric valve 19, the liquid in the main support tube 5, the arc-shaped airbag 7 and the liquid storage cylinder 11 cannot flow into the shunt tube 21, completing the overall positioning operation of the patient's head.

[0043] When the patient's inspection is completed, the arc-shaped airbag 7 needs to be disinfected after use to facilitate subsequent use by patients. The fixed electromagnet 28 is energized to generate magnetism. The fixed electromagnet 28 and the rebound magnet 27 are set with opposite poles. The fixed electromagnet 28 is fixed to the bottom wall of the arc-shaped plate 6 and absorbs the rebound magnet 27 by magnetic force. After the arc-shaped airbag 7 at the position of the pillow plate 8 is squeezed, the rebound magnet 27 and the fixed electromagnet 28 are driven to maintain a minimum distance. When the patient leaves the upper wall of the pillow plate 8, the arc-shaped airbag 7 is elastically reset. The rebound reset force of the arc-shaped airbag 7 is greater than the magnetic field strength between the rebound magnet 27 and the fixed electromagnet 28. The fixed electromagnet 28 controls the rebound speed of the arc-shaped airbag 7 by magnetically absorbing the rebound magnet 27. The nebulizer 24 extracts the shunt tube 2 through the nebulizer tube 23. 1, the disinfectant flows into the inside, and after being atomized by the atomizer 24, it is sprayed vertically to the top of the arc-shaped airbag 7. When the arc-shaped airbag 7 is reset, it absorbs the disinfectant inside the shunt tube 21 through the adsorption force generated, and the outside air enters the inside of the shunt tube 21 through the one-way air inlet valve 32. The inside of the shunt tube 21 is filled with air, and the disinfectant inside the shunt tube 21 flows back to the inside of the liquid storage cylinder 11 through the series pipe 20. The disinfectant inside the liquid storage cylinder 11 flows into the inside of the arc-shaped airbag 7 through the main support pipe 5 and the guide port 33. After the disinfectant inside the shunt tube 21 flows out, the atomizer 24 no longer generates disinfectant mist. At this time, the mist above the arc-shaped airbag 7 falls onto the upper wall of the arc-shaped airbag 7 under the action of gravity, thereby completing the disinfection operation of the contact surface between the arc-shaped airbag 7 and the patient;

[0044] The controller 29 controls the pressure sensor 9 to start, and the pressure sensor 9 monitors the pressure value inside the arc airbag 7 after being squeezed in real time through the detection end. When the pressure value inside the arc airbag 7 after being squeezed detected by the pressure sensor 9 is small and does not meet the operator's requirements, the liquid inside the arc airbag 7 is consumed, and the operator replenishes the liquid into the arc airbag 7; repeat the above operation after the next use.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] The above is a description of the present solution and its implementation methods, which is not restrictive. The drawings show only one implementation method of the present solution, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creative design without departing from the creative purpose of the present solution, they should all fall within the protection scope of the present solution.

Claims

1. A head positioning device for PET / MR, comprising a positioning arc plate (1), characterized in that: The device also comprises a headrest type fixing mechanism (2) and a backflow type mist elimination mechanism (17), wherein the headrest type fixing mechanism (2) is arranged on the positioning arc plate (1), and the backflow type mist elimination mechanism (17) is arranged on the headrest type fixing mechanism (2), and the headrest type fixing mechanism (2) comprises a soft pillow mechanism (3) and a head support mechanism (10), wherein the soft pillow mechanism (3) is arranged on the upper wall of the positioning arc plate (1), and the head support mechanism (10) is arranged on the side walls at both ends of the positioning arc plate (1), and the backflow type mist elimination mechanism (17) comprises a diversion mechanism (18), a spray mechanism (22) and a flow control mechanism (25), wherein the diversion mechanism (18) is arranged on the side wall of the head support mechanism (10), the spray mechanism (22) is arranged on the upper wall of the diversion mechanism (18), and the flow control mechanism (25) is arranged on the bottom wall of the diversion mechanism (18); The soft pillow mechanism (3) comprises an arc groove (4), a main support tube (5), an arc plate (6), an arc air bag (7), a pillow plate (8), a pressure sensor (9) and a guide port (33), wherein the arc groove (4) is arranged on the upper wall of the positioning arc plate (1), the arc groove (4) is arranged through, a plurality of groups of the main support tubes (5) are arranged on the inner wall of the arc groove (4), and the arc plate (6) is arranged on the upper wall of the main support tube (5); The head-butting mechanism (10) comprises a liquid storage cylinder (11), a guide block (12), a guide port (13), a guide magnetic column (14), a head (15), a retraction spring (16) and a control column electromagnet (30); a plurality of groups of the liquid storage cylinders (11) are arranged at both ends of the positioning arc plate (1); a main support tube (5) penetrates the positioning arc plate (1) and is connected to the liquid storage cylinder (11); the guide block (12) is arranged on a side wall of the liquid storage cylinder (11); and the guide blocks (12) are arranged opposite to each other; The flow dividing mechanism (18) comprises an electric valve (19), a series pipe (20), a flow dividing pipe (21), an exhaust valve (31) and a one-way air intake valve (32); the electric valve (19) is connected to the upper wall of the liquid storage cylinder (11), and the series pipe (20) is connected to the electric valves (19); The shunt pipe (21) is arranged across the positioning arc plate (1) and is communicated between the series pipes (20); the exhaust valve (31) is symmetrically arranged at both ends of the shunt pipe (21); the exhaust valve (31) is communicated with one end of the shunt pipe (21) close to the liquid storage cylinder (11); and the one-way air intake valve (32) is communicated with the bottom wall of the shunt pipe (21); The spray mechanism (22) comprises an atomizing tube (23) and an atomizer (24); the atomizer (24) is arranged on the upper wall of the shunt tube (21); an extraction end of the atomizer (24) penetrates the interior of the shunt tube (21); and the atomizing tube (23) is arranged at the atomizing end of the atomizer (24); The flow control mechanism (25) comprises a groove (26), a rebound magnet (27) and a fixed electromagnet (28); the groove (26) is arranged on the side wall of the pillow plate (8); the groove (26) is arranged to be through-through; the rebound magnet (27) is arranged inside the groove (26); the fixed electromagnet (28) penetrates the arc plate (6) and is arranged on the bottom wall of the arc-shaped airbag (7); the rebound magnet (27) and the fixed electromagnet (28) are arranged opposite to each other.

2. A head positioning device for PET / MR according to claim 1, characterized in that: The arc-shaped airbag (7) is arranged on the upper wall of the arc-shaped plate (6), the pillow plate (8) is arranged on the upper wall of the arc-shaped airbag (7), the pressure sensor (9) is arranged on the side wall of the arc-shaped airbag (7), the power end of the pressure sensor (9) is arranged through the inner wall of the arc-shaped airbag (7), and the guide port (33) is arranged between the main support tube (5), the arc-shaped plate (6) and the arc-shaped airbag (7).

3. A head positioning device for PET / MR according to claim 2, characterized in that: The guide opening (13) is arranged between the guide block (12) and the liquid storage cylinder (11); the guide magnetic column (14) is slidably arranged inside the guide opening (13); the top head (15) is arranged on a side of the guide magnetic column (14) away from the guide opening (13); the retraction spring (16) is arranged between the guide block (12) and the top head (15) outside the guide magnetic column (14); and the control column electromagnet (30) is arranged through a side of the liquid storage cylinder (11) away from the top head (15).

4. A head positioning device for PET / MR according to claim 3, characterized in that: A controller (29) is provided on the side wall of the positioning arc plate (1), and the controller (29) is electrically connected to the pressure sensor (9), the atomizer (24), the fixed electromagnet (28), and the column control electromagnet (30), respectively.

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