CN109363706B - CT scanner for brain detection - Google Patents

Abstract

The invention discloses a CT scanner for brain detection, which comprises a scanning frame; the scanning cavity is arranged on the scanning frame; the scanning bed comprises a base, a bed plate which can move back and forth and is arranged on the base, and a driving component for driving the bed plate to move back and forth, wherein the bed plate can pass through the scanning cavity when moving forward; the lifting device is arranged on the base and used for adjusting the horizontal height of the bed board; the deformation structure is used for controlling the bed plate to deform from a straight bed plate shape to a seat shape; the head support positioning device is arranged on the scanning frame and used for adjusting the position of the head support; and the flexible layer is arranged on the upper surface of the head support and is used for reducing the discomfort of the head of the patient when the head of the patient is placed on the head support. The position of the head support relative to the scanning frame is adjustable, so that the condition that the position of the head support makes a patient feel uncomfortable can be effectively avoided; the flexible layer is arranged on the head support, so that the head support can be effectively prevented from being too hard, and the comfortable sensation is enhanced.

Description

A CT scanner for brain detection

technical field

The invention belongs to the technical field of diagnostic instruments, in particular to a CT scanner for brain detection.

Background technique

Alzheimer's disease (AD) is a progressive neurodegenerative disease with insidious onset. Clinically, it is characterized by generalized dementia manifestations such as memory impairment, aphasia, apraxia, agnosia, impairment of visuospatial skills, executive dysfunction, and personality and behavioral changes. The patients of this disease are usually the elderly over 70 years old, because the aging of human body function leads to the progressive failure of the immune system, the weakening of the body's detoxification function, and lentiviral infection, etc., which may cause the disease.

The existing treatment methods usually use the hippocampus of the brain of the elderly with the disease to determine the condition and treatment. Many studies also record the experimental data by scanning the brain. Chinese patent CN207306680U discloses a "CT examination bed", which includes a bed board, a bed leg and a head support set on the bed board, but under this structure, the position of the head support cannot be adjusted, and it is difficult to adapt to the corresponding head support of different patients Position requirements; and the headrest is usually made of plastic, which is poor in inspection.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides a CT scanner for brain detection with adjustable head support position and high comfort.

In order to achieve the above object, the present invention adopts the following technical solutions: a CT scanner for brain detection, comprising:

a scanning frame, on which a head rest is arranged;

Scanning cavity set on the scanning frame;

a scanning bed, comprising a base, a bed board that can move forward and backward on the base, and a driving component for driving the bed board to move forward and backward, and the bed board can pass through the scanning cavity when moving forward;

A lifting device, arranged on the base, is used to adjust the horizontal height of the bed board;

a deformation structure for controlling the deformation of the bed board from a straight bed board shape to a seat shape;

a head support positioning device, which is arranged on the scanning frame and is used to adjust the position of the head support;

The flexible layer is arranged on the upper surface of the headrest, and is used for reducing discomfort when the patient's head is placed on the headrest.

In the present invention, the position of the head support relative to the scanning frame can be adjusted, thereby effectively avoiding the situation that the position of the head support makes the patient feel uncomfortable, and can also better cooperate with the scanning frame to adjust the patient to the most suitable scanning position, and the scanning effect can be improved. Better; a flexible layer is set on the headrest, which can effectively prevent the headrest from being too hard and enhance comfort;

Secondly, the height of the bed board is controlled by the lifting device, so that when testing patients with inconvenient mobility, the bed board can be lifted to a lower height, so that the patient can sit directly on the bed board without the need for climbing operations, effectively avoiding the need for The patient fell off the bed when he was in a state of confusion; and because the position of the bed was low, medical staff effectively reduced the need for lifting when lifting a paralyzed patient with advanced Alzheimer's disease on the bed. The height of the height of the medical staff is more labor-saving, and it can effectively prevent the patient from hitting the bed board because the lifting height of the patient is too low, so as to avoid the patient's injury; the bed board can be deformed into the state of the seat, and the position can be located in a lower position. so that when moving a patient in a wheelchair, only one medical staff can move the patient in the wheelchair to the bed in the seat state, and after moving to the bed, the patient can be maintained on the bed in a sitting position In addition, the medical staff does not need to support the patient with their own body to avoid the patient from falling; and the patient can directly follow the recovery of the bed board when lying down, without the need for the medical staff to support the patient with their hands to lay the patient flat, which further reduces the medical staff. workload and workload.

Further, the head rest positioning device includes two guide rails provided on the scanning bed, a plurality of positioning holes provided on the guide rails, an opening provided on the head rest for the guide rails to pass through, and fixed on the head rest. The limit plate on the upper limit plate and the locking piece passing through the limit plate, the locking piece can be screwed into the positioning hole; the position of the head rest is locked through the cooperation of the locking piece and the positioning hole, effectively Avoid the problem of the headrest shifting after being adjusted in place.

Further, the head support, the guide rail, the limiting plate, and the locking member are all made of plastic; they are not made of metal, which will not affect the scanning result.

Further, the head rest is provided with a head placement cavity in the middle and arm placement chambers on both sides of the head placement cavity; the flexible layer is a sponge layer adhered to the upper surface of the head rest, and the The sponge layer has downward depressions corresponding to the positions of the head placement cavity and the arm placement cavity respectively; the arm placement cavity is provided, so that when the patient's arm is stretched back, the arm can be placed in the arm placement cavity, and the comfortable feeling stronger.

Further, the head support is provided with a cover cloth layer covering the flexible layer, and the two ends of the cover cloth layer are respectively provided with Velcros on the left and right side walls of the head support; the flexible layer The upper corresponding to the depression and the cover layer corresponding to the depression are respectively provided with Velcro; the cover layer is made of cloth or leather, and the cover layer is in direct contact with the human body to avoid direct contact between the human body and the sponge layer; The layer can be removed by Velcro, which facilitates the removal of the cover layer.

Further, the bed plate includes a bottom plate, a head plate body close to the scanning frame, a buttock plate body movably connected with the head plate body, and a leg plate body movably connected with the buttock plate body. The body can be turned upward relative to the buttocks body, and the leg body can be turned downward relative to the buttocks body; through the arrangement of the three plates, it is ensured that after the bed plate is deformed into the shape of the seat, the head and buttocks of the patient can be effectively treated. It is made with the legs to prevent the patient from tilting due to lack of position; the three plates are movably connected, so that when it is turned to a horizontal state, it can form a bed plate and realize the dual-purpose function of the scanning bed.

Further, the deformation structure includes a cavity provided on the bottom plate, a support seat provided in the cavity for connecting the buttocks body and the bottom plate, and a support seat provided in the cavity and the head board body. The matching jack-up part and the pull-down part which are arranged in the cavity and cooperate with the buttock plate body; through the setting of the support seat, the lower part of the buttock plate body is effectively prevented from falling out, because the buttock plate body bears most of the weight, thus The arrangement of the support seat ensures that the buttocks board body has a good and stable support force, improves the firmness of the bedboard, and avoids the situation that the buttocks board body sags in the seat state.

Further, the lifting device includes a sliding rail arranged along the length direction of the cavity, a movable seat provided on the sliding rail that can move back and forth, and a lifting rod arranged on the movable seat, and the upper end of the lifting rod is movable. An angle adjustment head is connected, and the head plate body is provided with an opening slot for the angle adjustment head to be inserted into, and the angle adjustment head is fixedly connected with the open slot; in the process that the jacking rod is continuously lifted upwards, the head plate body Slowly flip up, and at the same time, the slide rail drives the moving seat to move forward slowly, so that the head plate body gradually tends to be perpendicular to the leg plate body; In the case of the position of the joint of the leg plate body, the first lifting is carried out from the position of the principle joint, the lever arm is longer, and the lifting operation is more labor-saving, so that it is easier to flip the head plate body upward and reduce the lifting rod. power and reduce energy consumption.

To sum up, the present invention has the following advantages: the position of the head support relative to the scanning frame is adjustable, which can effectively avoid the situation that the position of the head support makes the patient feel uncomfortable, and can also better cooperate with the scanning frame to adjust the patient to The most suitable scanning position, the scanning effect is better; a flexible layer is set on the head support, which can effectively avoid the head support being too rigid and enhance the comfort.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a partial schematic view of FIG. 1 .

FIG. 3 is an enlarged view of A in FIG. 2 .

Figure 4 is a side view of the present invention.

FIG. 5 is a cross-sectional view taken along line A-A in FIG. 4 .

FIG. 6 is an enlarged view of B in FIG. 5 .

Figure 7 is a front view of the present invention.

FIG. 8 is a cross-sectional view taken along line C-C in FIG. 7 .

FIG. 9 is an enlarged view of A in FIG. 8 .

FIG. 10 is an enlarged view of B in FIG. 8 .

Figure 11 is an exploded schematic view of the present invention.

Figure 12 is a cross-sectional view of the base of the present invention.

FIG. 13 is a schematic structural diagram of the mobile frame in the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in Fig. 1-13, a CT scanner for brain detection includes a scanning frame 1, a scanning cavity 11, a scanning bed 2, a head rest 10, a head rest positioning device, a flexible layer 20, and a cover cloth layer 40. Lifting device, deformation structure and moving frame 7, the scanning cavity 11 is set on the scanning frame 1, and other structures inside the scanning frame are the same as the scanning frame in the prior art, such as the scanning frame disclosed in Chinese patent CN108618790A , the specific structure and principle will not be repeated; the scanning bed 2 includes a base 21, a bed board 22 and a driving component, the bed board 22 can be moved forward and backward on the base, and the bed board 22 can pass through when moving forward. The scanning cavity 11; the driving component is used to drive the bed to move forward and backward, and the driving component includes a mover 61 arranged at the lower part of the bottom plate 221 and a drive track arranged on the base 21 to match the mover 62, wherein, the drive track is a strip-shaped groove arranged on the base, and the stator of the linear motor is arranged in it, and the mover is the mover of the linear motor, so that the mover can move along the stator, Drive the bed board to move; the principle of the linear motor and the cooperation between the mover and the stator are in the prior art, and will not be repeated; the lifting device is arranged on the base 21 and is used to adjust the horizontal height of the bed board 22 Specifically, the base 21 includes an upper seat body 211, a lower seat body 212, and an elastic connecting layer 213 arranged between the upper and lower seat bodies, wherein the elastic connecting layer 213 is a sleeve made of rubber, and the middle of the sleeve has a corrugated shape The upper end of the elastic connecting layer 213 is fixedly connected with the upper base body, and the lower end is fixedly connected with the lower base body; the lifting device comprises an upper groove cavity 214 set in the upper base body, a lower groove cavity 215 set in the lower base body, and Lifting rod 216, one end of the lifting rod 216 is fixedly embedded in the lower groove cavity 215, and the other end is fixedly connected with the upper groove cavity 214; preferably, the lifting rod is a hydraulic rod purchased on the market, when the piston rod of the hydraulic rod When moving down, the upper seat body can be driven down; the height of the bed board can be adjusted by the lifting of the base, and the difficulty of setting up the lifting device in the base is reduced by more than half compared with the setting on the bed board, which effectively reduces the difficulty of assembly; The base is lifted and lowered, and the space that can be lifted and lowered is larger, and it can be used in more working conditions.

The head rest 10 and the head rest adjusting device are both arranged on the scanning frame 1 , and the head rest adjusting device is used to adjust the position of the head rest 10 ; the flexible layer 20 is arranged on the head rest 10 On the surface, it is used to reduce the discomfort when the patient's head is placed on the headrest 10;

Specifically, the headrest positioning device includes two guide rails 301, a plurality of positioning holes 302, an opening 303, a limit plate 304 and a locking member 305, wherein the headrest 10, the guide rail 301, the limit plate 304, the locking The parts 305 are all made of plastic; the two guide rails 301 are arranged in a strip structure and are fixed on the upper surface of the scanning bed; the plurality of positioning holes 302 are evenly spaced in the length direction of the guide rails, and the two guide rails are respectively There are a plurality of positioning holes 302; the openings 303 are set to two, corresponding to the lower part of the head support, and the two guide rails pass through the two openings respectively; the limit plates 304 are also set to two, the position Corresponding to the two openings, they are respectively arranged on the side wall of the head support; the locking member 305 is penetrated on the limit plate, the outer wall of the locking member 305 is provided with an external thread, and the inner wall of the positioning hole is provided with an external thread. Internal thread, the locking member 305 can be screwed into the positioning hole 302 to be threadedly connected with the positioning hole.

The head rest 10 is provided with a head placement cavity 101 in the middle and an arm placement cavity 102 located on both sides of the head placement cavity, and both the head placement cavity 101 and the arm placement cavity 102 are arc-shaped depressions; The flexible layer 20 is a sponge layer adhered to the upper surface of the head rest, and the sponge layer has downward depressions corresponding to the positions of the head placement cavity 101 and the arm placement cavity 102 respectively; the cover cloth layer 40 Set on the headrest, specifically covering the flexible layer, the upper ends of the cover layer 40 are provided with Velcro 50 and the left and right side walls of the headrest are respectively provided with Velcro 50; the flexible layer 20 corresponds to The concave and the cover cloth layer 40 are respectively provided with a Velcro 50 corresponding to the concave. The Velcro can be directly purchased in the market, and the structure will not be described again.

Further, the bed plate 22 is made of plastic, including a bottom plate 221, a head plate body 222, a hip plate body 223 and a leg plate body 224. The head plate body 222 is close to the scanning frame, and the legs The part plate 224 is located at one end of the principle scanning frame, and the buttocks plate 223 is located between the head and the leg plate; one end of the buttocks plate 223 is pivotally connected with the head plate 222, and the other end is connected with the leg plate 224 is pivotally connected, and the head plate body 222 can be turned upward relative to the buttock plate body 223, and the leg plate body 224 can be turned downward relative to the buttock plate body 223; the above-mentioned pivot connection is not a metal bolt, but a non-metallic bolt. Bolts made of materials, such as glass fiber reinforced plastic, can effectively avoid the influence of metal materials on the scanning results; the deformation structure is used to control the deformation of the bed board 22 from a flat bed board shape to a seat shape; specifically, the deformation The structure includes a cavity 31 provided on the bottom plate, a support seat 32 provided in the cavity for connecting the buttocks body and the bottom plate, and a top plate provided in the cavity and matched with the head board body 222. The lifting part and the lowering part arranged in the cavity and matched with the hip plate body 223, the support seat 32 is also made of plastic.

The above-mentioned jacking device includes a sliding rail 41, a movable seat 42 and a lifting rod 43. The sliding rail 41 and the movable seat are rodless cylinders directly purchased on the market. The lifting rod is a hydraulic rod, and the structure will not be repeated here. Because the above structures are all located in the bed board, and then the metal parts will not affect the scanning structure; the upper end of the lifting rod is movably connected with an angle adjustment head 44 made of plastic, and the structure of the angle adjustment head 44 is connected with the universal joint. The structure is the same; the back of the head plate body 222 is provided with an opening slot 225 for the angle adjustment head to be inserted into. One end of the angle adjustment head 44 is connected with the jacking rod, and the other end penetrates into the opening slot 225 and is fixedly connected with the opening slot 225 ; During the continuous lifting of the jacking rod, the head plate body is slowly turned upward, and at the same time, the slide rail drives the moving seat to move forward slowly, so that the head plate body gradually tends to be perpendicular to the leg plate body; Compared with the case where the jacking rod is directly placed near the connection between the head plate and the leg plate, the first lifting is carried out from the position of the principle connection, the lever arm is longer, and the lifting operation is more labor-saving. Therefore, it is easier to flip the head plate body upwards, reducing the power of the jacking rod and reducing energy consumption.

The pull-down member includes a pull-down rod 51 and an elastic support component arranged on the bottom plate and matched with the leg plate body. The pull-down rod 51 is also a hydraulic rod, one end of which is connected to the leg plate body, and one end is connected to the cavity 31 . The bottom is fixedly connected; when the piston rod of the pull-down rod 51 moves down, the leg plate body can be flipped down; through the setting of the elastic support component, it is ensured that the leg plate body will not directly conflict with the bottom plate when it is flipped down, so as to avoid the occurrence of In the case where the leg panel cannot be turned down; the elastic support component can support the leg panel together with the pull-down part, which can effectively avoid the leg panel due to too few support points compared with the method of only setting the pull-down part. The problem is that the distance between the support point and the connection between the leg board and the hip board is too close to support the leg board well, avoiding the tendency of the leg board to turn down when the bed board is in a straight state. Avoid damage to the connections after long-term use.

The elastic component includes a C-shaped support plate 52, a C-shaped groove 53 and a plurality of elastic support members 54. The C-shaped groove 53 is provided on the side wall, and the lower part of the C-shaped support plate 52 can penetrate into the C-shaped support plate 52. In the groove 53, the plurality of elastic supports 54 are evenly distributed in the C-shaped groove 53. The elastic supports 54 are preferably springs, one end of the spring is fixed on the bottom of the C-shaped groove 53, and the other end is fixed on the The lower part of the C-shaped support plate 52 can act the restoring force on the C-shaped support plate 52; the C-shaped support plate 52 is in contact with the leg plate body in the initial normal state, and when the leg plate body 224 is turned downward, the The C-shaped support plate 52 will be squeezed and turned downward; the C-shaped support effect is stable, compared with the straight plate support, the support area for the leg plate body is increased, and the support is more stable; and The C-type can disperse the weight of the patient's legs to a certain extent, further reducing the possibility of the downward tendency of the leg plate under the straight state of the bed bottom.

The moving frame 7 is used to directly move the patient from the hospital bed to the bed board 22. The bed board 22 is provided with a placement cavity 8, and the movable frame 7 can be moved left and right to be placed in the placement cavity 8; specifically, the placement cavity 8. It includes a first cavity 81 set in the head board body, a second cavity 82 set in the buttock board body, and a third cavity 83 set on the leg board body. The moving frame 7 is made of plastic , including a connecting rod 71 and a plurality of moving struts 72 that are evenly spaced on the connecting rod along the length of the connecting rod. The moving struts 72 and the connecting rod are integrally formed by injection molding; The placement cavity 8 is arranged in the length direction, and is placed in the placement cavity; The third rod segment 713 provided in the third cavity, the first deformation segment 714 for connecting the first rod segment and the second rod segment, and the second deformation segment 715 for connecting the second rod segment and the third rod segment ; Among them, the first and second deformation sections are arc-shaped plastic sheets, with certain elasticity and deformation ability, the first and second deformation sections can also be integrally injection-molded with the above-mentioned three plates, which is convenient for processing; The setting of the deformation section effectively ensures that when the bed plate is deformed, the movable frame can follow the deformation to ensure the normal progress of the deformation; and the deformation section has restoring force and elasticity, so that when the patient is moved, the movable frame can still be maintained. Straight state to avoid unstable support of the mobile frame.

A cover plate 9 is detachably connected to the placement cavity 8. The cover plate is also made of plastic to shield the moving frame. The lower surface of the cover plate 9 is evenly spaced with a plurality of positioning plates made of plastic. The rod 91, the positioning rod 91 is a strip-shaped structure, and is directly injection molded with the cover plate; when the cover plate is placed in the accommodating cavity, the positioning rod 91 is just inserted between two adjacent moving struts; preferably, in order to adapt For the deformation of the bed board, the cover board 9 includes a first board body 911 , a second board body 912 , a third board body 913 , a first flexible member 914 for connecting the first and second boards, and a first flexible member 914 for connecting the second board , the second flexible member 915 of the third plate body; wherein, the positions of the first, second, and third plate bodies are respectively set corresponding to the first, second, and third cavities, and the first, second, and third The positions of the two flexible parts correspond to the positions of the first and second deformation segments respectively; the first and second flexible parts are rubber sheets made of rubber, which are fixedly connected by glue and moving; The cavity is closed to avoid gaps or gaps on the surface of the bed when the bed is in the seat state, so as to ensure that the patient will not feel uncomfortable when lying on the bed; the cover is also set to 3 plates to ensure that the cover The board can not only cover the placement cavity, but will not affect the deformation of the bed board to the seat state, so as to ensure the dual-purpose function of the bed board; Adapt to the deformation that needs to be generated at the connection of adjacent boards; and when the bed board is in a normal straight state, even if there is a certain gap between the adjacent boards, it can be blocked by the flexible piece to avoid The gap occurs during the deformation of the bed plate to the patient's flesh; through the cooperation of the positioning rod and the moving strut, the positioning of the cover plate by the mobile frame is realized, which effectively avoids the displacement of the cover plate when the bed plate is in normal use. And because the positioning rod and the moving strut are arranged in a staggered manner, when the cover plate is taken out, it is only necessary to pull the cover plate out, and the operation is simple.

Preferably, the front and rear side walls of the placement cavity 8 are respectively provided with strip-shaped positioning grooves 81 , and the front and rear sides of the cover plate 9 are respectively provided with strip-shaped clip portions 92 , and the clip portions 92 can be inserted into and the width of the positioning slot 81 gradually decreases along the width direction of the bed board 22, and in the process of continuously pushing the cover plate into the accommodating cavity, the clamping force of the positioning slot on the card portion will become more and more The larger the size, the firmer positioning of the cover plate in the accommodating cavity is ensured.

The hydraulic rods and rodless motors mentioned above are all electrically connected to the central processing system of the scanner, and the central processing system controls the work. The specific control method is the prior art and will not be repeated here.

Claims (5)

1. A CT scanner for brain detection, comprising: comprises that

A scanning frame (1) which is provided with a head support (10);

a scanning cavity (11) arranged on the scanning frame (1);

the scanning bed (2) comprises a base (21), a bed board (22) which can move back and forth and is arranged on the base, and a driving component for driving the bed board to move back and forth, wherein the bed board (22) can pass through the scanning cavity (11) when moving forward;

the lifting device is arranged on the base (21) and is used for adjusting the horizontal height of the bed plate (22);

the deformation structure is used for controlling the bed plate (22) to deform from a straight bed plate shape to a seat shape;

the head support positioning device is arranged on the scanning frame (1) and is used for adjusting the position of the head support (10);

a flexible layer (20) provided on the upper surface of the head rest (10) for reducing discomfort when the head of a patient is placed on the head rest (10);

the moving frame (7) is used for moving the patient from a sickbed to the bed board (22) directly;

the bed board (22) comprises a bottom board (221), a head board body (222) close to the scanning frame, a hip board body (223) movably connected with the head board body and a leg board body (224) movably connected with the hip board body, wherein the head board body (222) can be upwards overturned relative to the hip board body (223), and the leg board body (224) can be downwards overturned relative to the hip board body (223);

the deformation structure comprises a cavity (31) arranged on the bottom plate, a supporting seat (32) arranged in the cavity and used for connecting the hip plate body and the bottom plate, a jacking part arranged in the cavity and matched with the head plate body (222), and a pulling part arranged in the cavity and matched with the hip plate body (223);

the jacking component comprises a sliding rail (41), a moving seat (42) and a jacking rod (43), the upper end of the jacking rod is movably connected with an angle adjusting head (44) made of plastics, the back of a head plate body (222) is provided with an open slot (225) for the angle adjusting head to insert, one end of the angle adjusting head (44) is connected with the jacking rod, and the other end of the angle adjusting head penetrates into the open slot (225) and then is fixedly connected with the open slot (225); in the process that the jacking rod continuously jacks upwards, the head plate body slowly turns upwards, and meanwhile the sliding rail drives the moving seat to slowly move forwards;

the lower pull component comprises a lower pull rod (51) and an elastic support assembly which is arranged on the bottom plate and matched with the leg plate body, the jacking rod (43) is a hydraulic rod, the lower pull rod (51) is also a hydraulic rod, one end of the hydraulic rod is connected with the leg plate body, and the other end of the hydraulic rod is fixedly connected with the bottom of the cavity (31); when a piston rod of the lower pull rod (51) moves downwards, the leg plate body can be turned downwards;

a placing cavity (8) is arranged on the bed board (22), and the movable frame (7) can be placed in the placing cavity (8) in a left-right moving mode; the mounting cavity (8) comprises a first cavity (81) arranged in the head plate body, a second cavity (82) arranged in the hip plate body and a third cavity (83) arranged on the leg plate body;

the movable frame (7) comprises a connecting rod (71) and a plurality of movable support rods (72) which are uniformly distributed on the connecting rod at intervals along the length direction of the connecting rod, and the movable support rods (72) and the connecting rod are integrally formed through injection molding; the connecting rod (71) is arranged along the length direction of the mounting cavity (8) and is arranged in the mounting cavity;

the connecting rod (71) comprises a first rod section (711) arranged in the first cavity, a second rod section (712) arranged in the second cavity, a third rod section (713) arranged in the third cavity, a first deformation section (714) used for connecting the first rod section and the second rod section, and a second deformation section (715) used for connecting the second rod section and the third rod section;

the placing cavity (8) is detachably connected with a cover plate (9).

2. The CT scanner for brain detection according to claim 1, wherein: head support positioner is including locating two guide rails (301) on the scanning bed, locate a plurality of locating holes (302) on the guide rail, locate opening (303) that supply the guide rail to pass on the head support, link firmly limiting plate (304) on the head support and wear to locate retaining member (305) on this limiting plate, but this retaining member (305) screw in extremely in locating hole (302).

3. The CT scanner for brain detection according to claim 2, wherein: the head support (10), the guide rail (301), the limiting plate (304) and the locking piece (305) are all made of plastics.

4. The CT scanner for brain detection according to claim 1, wherein: the head support (10) is provided with a head placing cavity (101) positioned in the middle and arm placing cavities (102) arranged at two sides of the head placing cavity; the flexible layer (20) is a sponge layer adhered to the upper surface of the head support, and the positions of the sponge layer corresponding to the head placing cavity (101) and the arm placing cavity (102) are respectively provided with downward depressions.

5. The CT scanner for brain detection according to claim 4, wherein: a covering cloth layer (40) coated on the flexible layer is arranged on the head support (10), and magic tapes (50) are respectively arranged on the left side wall and the right side wall of the head support at two ends of the covering cloth layer (40); magic tapes (50) are respectively arranged on the flexible layer (20) corresponding to the depressions and the cover cloth layer (40) corresponding to the depressions.

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