JP2017086480A - Chair for imaging spine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce pain applied to a patient due to movement or body position change of the patient, improve an examination throughput, and improve reproductivity of imaging.SOLUTION: A chair 10 for imaging a spine comprises: a square plate-state seat part 11; a backrest part 12 which is rotatably supported to both side parts 28 of the seat part 11 and has a headrest 27; a reclining mechanism 13 for locking the backrest part 12 to a horizontal position with plural inclination angles; a pair of side plate parts 14 for supporting the seat part 11; a base frame 15 in which a base frame part 35 is fixed to a side plate lower end 34, which comprises a frame part 36 for overturn prevention for supporting a rotation moment in a direction of lowering the headrest 27 of the backrest part 12 whose becomes flush with the seat part 11 on the base frame part 35; and an X-ray detector 16 which is adjacent to the lower face of the seat part in parallel to the lower face of the seat part, slidably supported to the base frame 15 and which can move over a range between the seat part 11 and the backrest part 12 which are flush with each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a spinal imaging chair on which a patient who is a subject of X-ray imaging, for example, sits.

  2. Description of the Related Art Conventionally, an instrument used to support a human body during X-ray imaging is known as one of medical devices. For example, a patient support including a digital X-ray cassette disclosed in Patent Document 1 includes a base portion and a patient support portion located on the base portion. The patient support portion includes a deck having a back portion, a seat portion and a leg portion. The back portion is provided with a space for receiving a digital X-ray cassette. The seat portion and the leg portion are each provided with a space for receiving a separate digital X-ray cassette. A digital X-ray cassette is mounted in one or more of the three receiving spaces. According to this patient support, a digital X-ray cassette is connected to the patient support so that a physician or radiologist can digitally capture a digital X-ray image of one or more of the patient's back, buttocks, or legs. The X-ray generator can be easily operated so that it can be captured by the X-ray cassette.

  The wheelchair disclosed in Patent Document 2 includes a seat, a backrest that is attached substantially vertically to the seat, and a backrest that includes a main body that is detachably attached to the backrest so as to cross the backrest, and A grip part connected to the backrest strut, a wheel, a front lower strut connected to the wheel substantially perpendicular to the ground contact surface of the wheel, and a rear connected to the wheel substantially perpendicular to the ground contact surface of the wheel And a lower post. The backrest column is substantially perpendicular to the wheel ground plane. The main body is made of an X-ray transparent material. The backrest column is connected to the rear lower column in a straight line. The grip portion is connected to the backrest column so as to be detachable and rotatable. According to this wheelchair, it can usually be used for movement like a normal wheelchair, and during X-ray photography, it is not necessary to sit on other chairs, etc. X-ray imaging can be performed in the front-rear (front) direction, the side surface direction, and the oblique direction in a sitting position, a semi-sitting position, and a recumbent position using a line imaging apparatus.

  Since the multifunction wheelchair for hospitals disclosed in Patent Document 3 supports the seat and the back with only the two front legs, the legs are fixed to both ends of the front side of the square frame of the chassis equipped with casters at the four corners. The column is inserted through a height adjusting device, a space is provided under the seat, a bed is inserted therein, and the elbow rest is removed so that the patient can move easily. In addition, this multifunction wheelchair is equipped with a seat belt so that various members can be fixed and medical equipment can be attached, and medical care and examination can be performed while sitting on the seat. A film cassette receiving frame is attached to the back of the back so as to obtain. This multi-function wheelchair makes it easy to move with the patient's bed with a hospital wheelchair and allows the patient to receive medical care while sitting with various accessories attached. By enabling X-ray imaging, accurate diagnosis is possible.

  The wheelchair for X-ray photography disclosed in Patent Document 4 has a body frame and a footrest that are in an upright state around a horizontal fulcrum pin with respect to the body frame while the handwheel frame is interlocked with the footrest. It is determined so that it can be raised and lowered to the almost horizontal lying state or vice versa, and a pair of upper and lower parallel slide guide rails are attached and integrated behind the hand handle frame. It is determined that the X-ray film cassette holder can be inserted and removed from the slide guide rail between the slide guide rails. According to this X-ray imaging wheelchair, a wheelchair capable of quickly and conveniently X-raying a patient can be obtained.

Special table 2003-501115 gazette Japanese Patent No. 4050785 Japanese Utility Model Publication No. 6-19720 JP 2004-242898 A

  By the way, as an aging society, the bone density decreases with aging, and fractures at various parts of the body are seen. Among them, a spinal compression fracture is a disease that may lead to a decrease in quality of life (QOL), and thus requires accurate diagnosis and accurate treatment. In order to diagnose a patient who has developed a spinal compression fracture, it is indispensable to perform X-ray imaging with the front of the spine in the supine position and the side of the spine in the supine and sitting positions.

  However, for patients who have a spinal compression fracture, changing the body position from sitting to supine, supine to sitting, and moving from a wheelchair to a radiography table is accompanied by pain due to compression fracture, and the time required for imaging (examination) is also considerable. Takes time. In other words, the inspection amount that can be processed in a certain time (in other words, inspection throughput) is reduced. In addition, the posture change from the sitting position to the supine position, the supine position to the sitting position, the movement to the imaging table, and the movement to the optimal position on the imaging table not only cause pain, but the subject is also displaced. The reproducibility of photographing is reduced by causing a difference in enlargement ratio every time an image is photographed. In this specification, “imaging reproducibility” means, for example, the patient's body position (that is, the patient's supine position or sitting state at the time of imaging) ) Says that the difference is less likely to occur.

  In addition to this, for example, the configuration shown in FIG. 8 of Patent Document 2 and FIG. 1 of Patent Document 3 has a low back portion (backrest portion), so that a twist with different lateral rotation may occur in the spine every time photographing is performed. This also reduces the reproducibility of shooting. In addition, as shown in FIG. 5 of Patent Document 2, a posture in which both hands are raised upward when taking a sitting posture causes pain, and this also causes a twist in the spine, thereby reducing the reproducibility of imaging. Let In FIG. 5 of Patent Document 2, if the backrest portion shown in FIG. 1 of the same document is used, a metal member may be reflected in an image at the time of sitting sitting.

  Further, in the configuration of FIG. 11 of Patent Document 2, if the backrest portion is tilted to a posture in which the back is bent backward (half-sitting position), there is a risk of falling backward. On the other hand, the configuration shown in FIG. 16 of Patent Document 4 is effective when the backrest is horizontal, but in the case of the semi-sitting position in which the backrest portion is inclined, the auxiliary wheel support leg and the auxiliary free wheel are provided. There is a risk of falling to the rear without touching the ground as described above.

  Furthermore, in any configuration of Patent Documents 1 to 4, the boundary between the seat and the backrest, i.e., the portion across the thoracic vertebra, lumbar vertebra, and sacrum, is captured with a single image (film) without forcing the patient to move. This can be expected to be difficult.

  The present invention has been made in view of the above circumstances, and provides a spinal imaging chair that can reduce pain associated with patient movement and posture change, improve examination throughput, and improve imaging reproducibility. The purpose is to do.

  The present invention includes a rectangular plate-like seat portion arranged in parallel to the floor surface, a backrest portion that is rotatably supported at a rotation center in a direction along the rear side portion of the seat portion, and the backrest portion. A reclining mechanism that locks at a plurality of inclination angles between a position substantially perpendicular to the seat portion and a horizontal position that is on the same plane, and is supported in parallel and slidably close to the lower surface of the seat portion; A spinal radiography chair comprising: an X-ray detector that is movable between the seat portion and the backrest portion that are in the same plane.

According to this spinal photography chair, the backrest portion is rotatably supported by the seat portion, and is the same from a position substantially perpendicular to the seat portion (for example, a position tilted backward by 10 degrees from the vertical position) by the reclining mechanism. Arrangement is possible up to a horizontal position that is a plane. The X-ray detector corresponding to the X-ray film is supported in parallel and slidably close to the lower surface of the seat portion, and can move between the seat portion and the backrest portion which are in the same plane. . As a result, it is possible to shoot the supine front from the sitting side. That is, the spinal imaging chair can perform a series of imaging without moving the patient. In addition, it is not necessary for the patient to move to the vicinity of the center of the imaging table at the time of front imaging, and the patient who is having a compression fracture is not forced to perform difficult operations that cause pain.
Also, once the spinal photography chair is seated on the chair, side-viewing in the sitting position, side-viewing in the supine position with the backrest reclining, and front-viewing in the supine position can be performed. For this reason, it is possible to greatly shorten the time for patient movement and device setting.
The spinal imaging chair takes a side view of a sitting position, and reclines the backrest portion as it is, thereby taking a side view of the supine position without moving the patient. In that case, since the geometrical arrangement of the X-ray tube apparatus, the subject, and the X-ray detector in the X-ray bundle direction does not change, there is no difference in image due to the difference in magnification between the sitting position and the supine position. In addition, even when the patient sits on the spine photography chair and the backrest is tilted backwards to the supine position, the backrest is formed in a long shape so that the backrest is Can be safely supported so that the patient will not fall backwards.

  In addition, the present invention is a spinal photography chair further including a headrest on a side opposite to the seat portion with respect to the rear side portion.

  According to this spine photography chair, the spine photography chair is formed in a long length with the backrest part extending to the headrest provided on the opposite side of the seat part with respect to the rear side part of the seat part. For this reason, the backrest part is slightly tilted (for example, the backrest part is tilted backward by 10 degrees), and the back and both shoulders are brought into close contact with the backrest part in parallel, so that it is difficult to cause twisting of the lateral rotation of the spine when sitting. As a result, it is difficult for a difference to occur in the position at each shooting time, the images can be compared accurately, and an accurate diagnosis based on the shot images can be performed.

  Further, according to the present invention, a cushioning X-ray transmission mat having a thickness equal to a reflection preventing distance from a contact surface to the human body is attached to the seat support portion and the backrest portion on the human body support surface side. This is a spine photography chair.

  According to this spinal photography chair, the seat part and the backrest part are provided with an X-ray transmission mat having cushioning properties, and the X-ray transmission mat has a structure made of metal members of the seat part and the backrest part at the time of X-ray photography. It is formed with a thickness corresponding to the reflection prevention distance of the part. When the patient is supported by the seat part and the backrest part, the patient is arranged away from the structural part made of the metal member of the seat part and the backrest part by a reflection preventing distance. Accordingly, it is possible to easily prevent the structure portion from being reflected in the image during side photographing. Further, since the X-ray transmission mat is made of a soft material with little X-ray absorption and has a thickness, it can be made difficult to cause pain even when a patient whose spine is overhanging sleeps.

  Further, according to the present invention, the reclining mechanism includes a damper that suppresses rotation of the backrest portion, and a lock release lever that stands vertically from the seat portion and releases the lock of the backrest portion, and the unlocking The lever is a spinal photography chair that is detachably attached from the seat.

According to this spinal photography chair, when the backrest portion is unlocked by the lock release lever, the rotation is started by the load from the back, but the rotational speed is suppressed by the resistance of the damper. That is, the backrest portion does not fall down suddenly, and the rotation speed to the next lock position is lower than that in the case of free rotation, and the rotation is gentle.
Moreover, the lever base part of the lock release lever is attached to the seat part below the X-ray transmission mat. As a result, the lock release lever and the connecting portion of the reclining mechanism to which the lock release lever is attached are excluded from between the reflection prevention distances and are not reflected in the image at the time of side shooting.

  In the present invention, a holding bar is attached to the seat portion, and the holding bar is at least one of a pair of side portions sandwiching the rear side portion at a bar base end rotation center in the same direction as the rotation center. Spine photography, comprising: a bar base that is rotatably supported on one side; and an arm rest that is rotatably connected to the tip of the bar base at a bar folding rotation center in a direction perpendicular to the axis of the bar base Chair.

  According to this spinal photography chair, the arm rest of the holding bar can be deployed from the folding position parallel to the bar base to the arm holding position orthogonal to the bar base by rotating around the bar folding rotation center. Become. When the patient sits on the seat, the arm rest section that has become the arm holding position extends right and left just in front of the patient's chest. The patient puts both arms on this arm rest when taking a side view. As a result, the holding bar can make the patient in a relaxed state at the time of side photographing, and can prevent both arms from being reflected in the photographed image at the time of X-ray photographing.

  In the present invention, the bar base is provided on each of the pair of side portions of the seat, the arm rest is connected to one of the pair of bar bases, and the arm rest is the other A spinal radiography chair that is releasably coupled to the bar base.

  According to this spinal photography chair, the holding bar has a pair of bar bases. The pair of bar bases stands up from the same position in the front-rear direction of the pair of side portions at the arm holding position. The arm rest portion is connected to one of the pair of bar base portions, and is coupled to the distal end side (upper end side) of the other bar base portion with the distal end side thereof standing up. That is, the holding bar has an arch shape (gate shape) with the seat portion interposed therebetween. According to this holding bar, the strength against the load applied to the arm rest portion can be increased.

  Further, the present invention is provided with a holding bar having a pair of bar bases fixed and released at respective positions of a pair of both side parts sandwiching the rear side part and detachably connected to the seat part. This is a spine photography chair.

  According to this spinal photography chair, the holding bar can be removed from the seat, and further has a pair of bar bases connected to each other. The holding bar can contribute to a relaxed state during X-ray imaging of the patient, for example, by extending both arms to a portion where the bar base is connected when the patient X-rays the side. In addition, the holding bar can be removed from the seat when taking X-rays when the patient is lying down, for example, thereby preventing reflection in the captured image and enabling high-precision diagnosis for doctors and radiographers. It becomes.

  The present invention is also a spinal photography chair in which the bar base is releasably locked at a plurality of rotational positions.

  According to this spinal photography chair, the bar base portion of the holding bar is releasably locked at each rotational position. Thereby, arrangement | positioning of the arm rest part to an optimal position is attained with respect to each of the patient from whom a physique differs.

  Further, the present invention is the spinal radiography chair in which the seat portion and the backrest portion are metal non-use portions in which a region corresponding to the movement range of the X-ray detector is excluded from the metal member.

  According to this spinal photography chair, the X-ray detector can be moved between the seat and the backrest in a state where the seat and the backrest are in the same plane. As a result, the spine imaging chair can capture a desired portion of the thoracic vertebra, lumbar vertebra, and sacrum with a single image (film) by the moved X-ray detector. Under the present circumstances, the area | region of the seat part and backrest part according to the movement range of a X-ray detector is a metal non-use part. This prevents a foreign object (metal member) from being reflected in the image during front-side shooting in the supine position, and an image that is easier to diagnose can be obtained.

  Further, according to the present invention, a base frame portion is fixed to a pair of side plate portions that support a pair of both side portions sandwiching the rear side portion, and a side plate lower end of the side plate portion opposite to the seat portion, and the seat portion A base frame in which a fall-preventing frame portion that supports a rotational moment in a direction of lowering a headrest provided in the backrest portion due to a lateral load applied to the backrest portion that is flush with the backrest portion extends to the base frame portion And a spine photography chair.

  According to this spinal photography chair, since the fall prevention frame portion is extended to the base frame portion fixed to the lower end of the side plate opposite to the seat portion of the pair of side plate portions in the base frame, the patient is in a supine position. Even if you lie down so that the backrest is parallel to the floor during X-ray photography, the patient's head does not tilt toward the floor like a seesaw, and is fixed to the base frame of the base frame. Since the pair of side plate portions firmly support the seat portion, the seat portion does not move in the head-to-tail direction of the patient, so that the patient can perform X-ray imaging in the supine position with peace of mind.

  The present invention also provides spinal imaging, wherein the base frame is provided with a plurality of casters that movably support the base frame on the floor and a stopper that restricts the movement of the base frame on the floor. Chair.

  According to this spinal photography chair, the base frame does not move due to the load applied from the patient during the movement to the sitting position, and the patient can be seated safely. The spinal radiography chair can be moved by a caster while the patient is placed by releasing the restriction on the movement of the stopper while the patient is supported. As a result, the spinal imaging chair can easily finely adjust the X-ray incident point in the head-to-tail direction with respect to the patient by moving the base frame.

  ADVANTAGE OF THE INVENTION According to this invention, the pain accompanying a patient's movement and a posture change can be reduced, test | inspection throughput can be improved, and the reproducibility of imaging | photography can be improved.

The perspective view of the chair for spine photography of this embodiment Side view of the spine photography chair shown in FIG. FIG. 1 is a plan view when the spinal photography chair shown in FIG. 1 is in a horizontal state. The side view which looked at the chair for spine photography shown in FIG. 3 from the right side of the figure The front view which looked at the chair for spine photography shown in FIG. 4 from the foot side The front view which looked at the chair for spine photography shown in FIG. 4 from the head side The principal part expansion perspective view which shows the holding | maintenance bar by which the armrest part was folded up 1 is a perspective view of the spinal imaging chair shown in FIG. Plan view showing the positional relationship between the back part and back part of the patient when sitting 4 is a perspective view of the spinal imaging chair shown in FIG. 4 that supports a patient who is in a supine position during frontal imaging. Front view of a spinal radiography chair provided with a holding bar according to a modification including a pair of bar bases

  Hereinafter, an embodiment (hereinafter, referred to as “the present embodiment”) that specifically discloses the contents of a spinal photography chair according to the present invention will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

  FIG. 1 is a perspective view of a spine photography chair 10 of the present embodiment. The spine imaging chair 10 of the present embodiment can be suitably used for X-ray imaging for diagnosis of, for example, a spinal compression fracture. In spinal compression fractures, follow-up is necessary to take multiple shots with a given period of time (for example, about 1 to 2 weeks), so the reproducibility of positioning (ie, the posture of the patient at the time of taking) Is required. In addition to this, it is required to minimize patient pain and improve imaging throughput. In order to realize such a request, the spine imaging chair 10 includes a seat portion 11, a backrest portion 12, a reclining mechanism 13, and an X-ray detector 16 as main components.

  FIG. 2 is a side view of the spine imaging chair 10 shown in FIG. The seat portion 11 is arranged along the floor surface and is formed in a square plate shape. The seat portion 11 is formed with a horizontal width direction of about 600 mm, for example. The effective seating width in which the patient as the subject 17 (see FIG. 8) is in the sitting position is about 500 mm. As a result, the spine imaging chair 10 reduces the extra length in the left-right width direction, and makes it easier to position the subject 17 at the center of the seat portion 11. The subject 17 includes a patient. Hereinafter, the subject 17 is also referred to as a patient in this specification.

  The seat portion 11 is connected to the opposite side of the rear side portion 18 (see FIG. 3) so that a foot plate 19 along the tibia is rotatably connected by a foot plate rotating shaft 21 in the same direction as the rotation center 20 of the backrest portion 12. Is done. In the sitting position, the footrest plate 19 is disposed in a direction along the tibia as shown in FIG. In the following description, as shown in FIG. 7, for example, the rotation center 20 has a structure like a pair of left and right disc bodies sandwiching the seat portion 11 from both sides (that is, a flat outer cylinder and inner cylinder with a short axial direction). Is a rotating part that fits in a relatively rotatable manner), but may have a rod-like rotating shaft structure instead of a disk-like structure. In the present specification, it is assumed that the center of rotation has the same concept as the above-described concept in the following description.

  By using the X-ray tube device 22 on the patient sitting on the spine imaging chair 10, lateral imaging is performed. The X-ray tube device 22 is movable to move the X-ray irradiation unit 23 (see FIG. 10), the side X-ray detector 24, the lifting device 25, and the X-ray irradiation unit 23 from the side of the patient to the front. An arm (not shown) and a computer (not shown) as a control device are provided. The lateral X-ray detector 24 can be adjusted in the vertical position by the lifting device 25. The positions of the movable arm and the lifting device 25 are controlled by a computer. For example, the X-ray tube device 22 operates so as to be automatically arranged in the input imaging direction by inputting the imaging posture displayed on the display device connected to the computer from the input device connected to the computer. Is controlled.

  The X-ray irradiation unit 23 applies a high voltage to the X-ray tube with a high voltage generator (not shown). As a result, an electron beam from the cathode of the X-ray tube is irradiated onto the anode target to generate X-rays.

  At the time of side imaging, the interval between the side X-ray detector 24 and the X-ray irradiation unit 23 is set to 1200 mm. The spine imaging chair 10 is disposed in substantially contact with the lateral X-ray detector 24. Therefore, a space of about 600 mm is vacant between the spine imaging chair 10 and the X-ray irradiation unit 23. This space is a working space for doctors and radiographers.

  A safety belt 26 is attached to the rear side 18 which is the back side of the seat 11. The safety belt 26 is fastened and unfastened by a hook-and-loop fastener or Velcro (registered trademark) that can easily fix the patient.

  The backrest 12 is formed with the same width as the seat 11. The backrest part 12 is formed as a long thing (a foot top direction is about 650 mm) which has the headrest 27 (a foot top direction is about 250 mm) compared with the conventional backrest part. The backrest portion 12 is rotatably supported by a pair of both side portions 28 sandwiching the rear side portion 18 of the seat portion 11 at a rotation center 20 in a direction along the rear side portion 18. The backrest part 12 is set to a posture (half-sitting position) slightly tilted backward from a position substantially perpendicular to the seat part 11 at the time of sitting position photographing. The inclination angle of the semi-sitting position can be evaluated, for example, with an upper limit of 30 °. The inclination angle of the backrest portion 12 preferable for evaluation is, for example, 5 ° to 10 °. In the example shown in FIG. 1, the backrest 12 is inclined, for example, 10 °. The backrest 12 has a headrest 27 on the opposite side of the seat 11. The headrest 27 is detachable from the backrest 12.

  As for the seat part 11 and the backrest part 12, the frame (not shown) which consists of a metal member as a structure part is provided in the both sides of the left-right width direction. Between the pair of left and right frames, a metal non-use portion described later is formed. This metal non-use part is set corresponding to the movement range of the X-ray detector 16. For this reason, the pair of left and right frames are immediately joined to each other by the horizontal member outside the metal non-use portion to ensure strength.

  The seat 11 and the backrest 12 are provided with an X-ray transmission mat 29 having a cushioning property having a thickness D equal to a reflection preventing distance from a contact surface to a supported human body (that is, a patient) on the human body support surface side. It is attached. As the X-ray transmitting mat 29, for example, PE light β-200 having a thickness of 60 mm manufactured by Inoac Co., Ltd., which is a material that has cushioning properties and hardly absorbs X-rays, can be suitably used.

  A pair of left and right moving handles 30 are attached to the back side of the backrest 12. When the backrest 12 is tilted, the spine photographing chair 10 is moved while the moving handle 30 is gripped when moving in the sitting position and the supine position.

  FIG. 3 is a plan view when the spinal photography chair 10 shown in FIG. 1 is in a horizontal state. The reclining mechanism 13 locks the backrest part 12 at a plurality of inclination angles from a position substantially perpendicular to the seat part 11 to a horizontal position on the same plane. The spinal imaging chair 10 becomes a flat imaging table by the backrest 12 being rotated (that is, tilted) to a horizontal position parallel to the floor surface.

  A damper and a lock release lever 31 are attached to the reclining mechanism 13. As the damper, an oil damper 32 can be suitably used. The oil damper 32 is configured by providing a piston in a cylinder filled with a working fluid and connecting two cylinder chambers in the cylinder defined by the piston through a speed adjusting flow path such as an orifice. When a load is applied to the piston, the fluid moves between the two cylinder chambers with resistance through the orifice. Thereby, a braking force (damping force) can be applied to the movement of the piston in one direction. In the spine photography chair 10, a braking force can be applied to the rotation of the backrest 12. To move the piston in the reverse direction, open a check valve. In the spine photography chair 10, a portion corresponding to the piston is connected to the backrest portion 12. In addition, a fluid pressure cylinder such as a gas cylinder may be used as the damper.

  FIG. 4 is a side view of the spinal photography chair 10 shown in FIG. 3 as viewed from the right side of FIG. The oil damper 32 suppresses a sudden fall (rotation) of the backrest 12. The lock release lever 31 stands substantially vertically or vertically from the seat portion 11 and releases the lock of the backrest portion 12. The oil damper 32 can recline the backrest portion 12 by pulling the lock release lever 31 to the back side. When the lock release lever 31 is returned to the toe side, the rotation (falling) of the backrest portion 12 is fixed. The lock release lever 31 is attached so that the lever base 33 can be removed from the seat portion 11 below the X-ray transmission mat 29. As a result, the lever base portion 33 is prevented from being reflected in the subject as a photographed image during X-ray photography after removal.

  FIG. 5 is a front view of the spinal imaging chair 10 shown in FIG. 4 as viewed from the foot side. The side plate portion 14 supports the pair of side portions 28 of the seat portion 11. The side plate portion 14 is made of a high-strength thick metal plate in order to support the seat portion 11, the backrest portion 12, and the total load of the patient. In addition, the center hole of the side plate part 14 is a lightening hole for weight reduction.

  The base frame 15 has a side plate lower end 34 fixed to a base frame portion 35 (see FIG. 2). The base frame 15 has a fall prevention frame portion 36 extending from the base frame portion 35. The fall-preventing frame portion 36 supports a rotational moment in a direction in which the headrest 27 is lowered due to a saddle load applied to the backrest portion 12 that is flush with the seat portion 11. The base frame 15 is formed in a rectangular shape, and the total length in the foot leading direction is set to about 1500 mm, for example.

  A plurality of casters 37 that support the base frame 15 so as to be movable on the floor surface and a stopper 38 that restricts the movement of the base frame 15 on the floor surface are provided on the base frame 15. The casters 37 are attached to the four corners of the base frame 15. The stoppers 38 are provided, for example, at the front side of the base frame 15 and at three locations on the left and right. One of the pair of stoppers 38 provided on the front side of the base frame 15 is for release.

  On the foot side of the base frame 15, a step 39 is provided. The step 39 is a step when the patient sits down on the seat 11 at the time of taking a sitting position. For example, the step 39 has a size of about 350 mm in the direction of the top of the foot. A rubber slipper having irregularities is attached to the surface of the step 39. A handle 40 stands up in the vicinity of the step 39 of the base frame 15. The handle portion 40 is a support when the patient puts his / her foot on the step 39 and takes a sitting position.

  FIG. 6 is a front view of the spinal photography chair 10 shown in FIG. 4 as viewed from the head side. The X-ray detector 16 is arranged close to and parallel to the lower surface of the seat portion facing the base frame 15. The X-ray detector 16 is slidably supported on the base frame 15. The X-ray detector 16 is slidable and movable between the seat portion 11 and the backrest portion 12 that are in the same plane (that is, in a state parallel to the floor surface). This moving distance can be up to about 800 mm, for example. The spinal imaging chair 10 moves from the position where the X-ray detector 16 covers the entire backrest 12 to the position where the entire seat 11 is covered during frontal imaging in the patient's supine position. Shooting can be performed without omission.

  The slider 41 is slidably supported in parallel to the floor surface by a pair of slide rails 42 (see FIGS. 5 and 6) that are fixed to the base frame 15 and extend in the foot leading direction. The slide rail 42 can be slid by, for example, releasing the fixation of the sliding restriction lever 43, while being restricted by fixing the sliding restriction lever 43.

  The X-ray detector 16 is used, for example, at the time of front imaging in the patient's supine position. Therefore, the X-ray detector 16 is normally used by being arranged in the horizontal direction.

  The X-ray detector 16 includes a flat box-shaped housing 44 having an opened upper surface that is slid and a tray 45 that can be pulled out from either the left or right width direction of the seat portion 11 with respect to the housing 44. (See FIG. 6). On the drawer side of the tray 45, a handle 46 is formed. The tray 45 can be easily pulled out from the side of the spine imaging chair 10 as shown in FIG. 6 by putting the fingers of a doctor or radiographer on the handle 46. In the X-ray detector 16, for example, an X-ray imaging film is set on the drawn-out tray 45. The film for X-ray photography can be easily taken out from the tray 45 by a notch formed on the end face on the drawer side of the tray 45 (for example, the end face opposite to the side X-ray detector 24).

  The X-ray detector 16 can be referred to as a cassette (image receiving unit). As the X-ray detector 16, a digital cassette (CR) or a flat panel detector (FPD) can be used in addition to a film cassette for X-ray imaging. The digital cassette can display imaging information as an image on a display device of a computer and store it in a storage unit without forming an image on a film cassette for X-ray imaging. The imaging information can be transmitted and received between doctors and radiographers in different places (for example, an operation room next to the X-ray imaging room) via, for example, a telecommunication network.

  In the seat portion 11 and the backrest portion 12, a region corresponding to the movement range of the X-ray detector 16 is a metal non-use portion 47 (see FIG. 3) from which a metal member is excluded. In other words, in the seat portion 11 and the backrest portion 12, a structure portion using a metal member is disposed in an area excluding the metal non-use portion 47.

  FIG. 7 is an essential part enlarged perspective view showing the holding bar 49 in which the arm rest portion 48 is folded. A holding bar 49 is attached to the seat portion 11 in advance, and the holding bar 49 includes a bar base portion 50 and an arm rest portion 48. The bar base 50 is a bar base end rotation center 51 that is in the same direction as the rotation center 20 when the backrest 12 rotates with respect to the seat portion 11, and is rotatably supported by at least one of the pair of side portions 28. The The bar base 50 is rotated at an angle of at least 90 ° from the standing position to the horizontal position. The arm rest portion 48 is rotatably coupled to the tip of the bar base 50 at a bar folding rotation center 52 in a direction perpendicular to the axis of the bar base 50 and perpendicular to the rotation center 20. The arm rest portion 48 is rotated outward at an angle of 270 ° from a direction parallel to the seat portion 11 and can be folded in parallel with the bar base portion 50.

  In the present embodiment, the bar base 50 and the arm rest portion 48 are connected by a joint plate 53 having two bar folding rotation centers 52 in the same direction. Thus, the arm rest 48 is rotated by 270 ° (that is, from the state of the arm rest 48 shown in FIG. 7 to the state in the same direction as the rotation center 20 after the arm rest 48 is rotated 270 degrees clockwise). Rotation). The holding bar 49 may be folded by one bar folding rotation center 52. Note that a cushioning sponge or the like for relaxing the reaction force on the arm is attached to the surface of the arm rest portion 48.

  The bar base 50 is releasably locked at a plurality of rotational positions. The holding bar 49 can be adjusted to a position where the arm rest portion 48 is at a desired distance from the chest of the patient sitting on the seat portion 11 by rotating the bar base portion 50.

  Next, a procedure for X-ray imaging using the spine imaging chair 10 will be described.

  FIG. 8 is a perspective view of the spine imaging chair 10 shown in FIG. 1 that supports the patient during the sitting position imaging. The spine is composed of approximately 30 vertebrae (with exceptions): cervical vertebrae (7 vertebrae), thoracic vertebrae (12 vertebrae), lumbar vertebrae (5 vertebrae), sacral vertebrae (5 vertebrae) and tail vertebrae (1 vertebrae). . There is an intervertebral disc between the vertebrae. The spine opens and closes (moves) slightly between the vertebrae due to the load. That is, in spinal compression fractures, the vertebrae are crushed and the vertebral body height is lowered due to the patient's own weight in the sitting position, and the collapsed vertebrae are released by the own weight in the supine position and the vertebral body height is increased. The condition of the spinal compression fracture is evaluated by observing the mobility of the vertebra compressed and deformed from the mortar shape to the wedge shape. That is, in the diagnosis of a compression fracture, imaging in a sitting position and a supine position is necessary in order to investigate which vertebra has a change in vertebral body height.

  In X-ray imaging of a spinal compression fracture, imaging is performed in at least three patterns: lateral imaging in a sitting position, lateral imaging in a supine position, and front imaging in a supine position. First, at the time of sitting position imaging, the spine imaging chair 10 is moved close to the side X-ray detector 24 and then moved by the stopper 38. The patient holds the handle 40 to support the body, puts his / her foot on the step 39, rides on the step 39, and then sits on the seat 11. The spine photographing chair 10 has a backrest portion 12 slightly inclined. The seated patient is brought into close contact with the back leaning against the backrest 12. A safety belt 26 is used as necessary.

  In the spinal imaging chair 10, the holding bar 49 is deployed, and the arm rest portion 48 is disposed in front of the patient. The patient places both arms on the arm rest section 48. Thereafter, the X-ray irradiation unit 23 of the X-ray tube apparatus 22 is arranged on the right side of the patient, for example. By projecting X-rays from the X-ray irradiation unit 23, a projected image of the spine is recorded by the lateral X-ray detector 24 of the X-ray tube device 22.

  FIG. 9 is a plan view showing the positional relationship between the back portion of the patient and the backrest portion 12 at the time of sitting position photographing. At the time of side photography in this sitting position, the backrest portion 12 is inclined, so that the patient has both shoulders in close contact with the backrest portion 12 in parallel. Therefore, in the spine photographing chair 10, the spine is not twisted unlike the conventional case.

  FIG. 10 is a perspective view of the spinal imaging chair 10 shown in FIG. 4 supporting a patient who is in a supine position during frontal imaging. Shooting in the supine position is performed following shooting in the sitting position. The spinal imaging chair 10 tilts the backrest 12 to a horizontal position by the reclining mechanism 13 while the patient is sitting from the sitting position. In the state where the backrest 12 is inclined and in the supine position, the patient is already at the end of the flat seat 11 and the backrest 12 in the left-right width direction, and the side X-ray detector 24 is positioned at the end. Therefore, there is no risk of falling.

  In this supine position, first, side surface photography is performed. In side view shooting in the supine position, the hand cannot reach the holding bar 49, so a lightweight holding block (not shown) is placed on the abdomen, and a hand is placed on it. This prevents reflection of the hand during side shooting in the supine position. In side imaging, a projected image of the spine is recorded by the lateral X-ray detector 24 of the X-ray tube apparatus 22.

  Next, frontal imaging is performed in the same supine position. In frontal view in the supine position, the patient lowers both hands to the side. In frontal imaging, the X-ray irradiation unit 23 is moved above the patient. In frontal imaging in this supine position, an X-ray detector 16 slidably provided on the spinal imaging chair 10 is used.

  As described above, the spine imaging chair 10 can perform side-view shooting in the supine position and reclining-up front view in which the backrest 12 is reclined from the sitting position. This ensures that the enlargement ratio in the sitting position and the supine position is constant, particularly in side-view photography. As in the prior art, there is no positional deviation between the sitting position and the supine position by moving the imaging stand, and pain associated with the movement.

  Note that the spinal imaging chair 10 can also perform X-ray imaging of the chest and X-ray imaging of the abdomen without moving after imaging the spine.

  Further, the spine photographing chair 10 can be set at the corners of the seat portion 11 and the backrest portion 12 by combining a plurality of spacers 54 (see FIG. 2) having different shapes as accessories. The spacer 54 secures a gap between the patient and the backrest 12 in the sitting position. Thereby, the spine imaging chair 10 can perform dynamic imaging such as forward bending and backward bending of the patient. At this time, even if the patient falls backwards at the time of backward bending, the long backrest 12 is disposed rearward, so that the safety is ensured more than before. In a spinal compression fracture, dynamic imaging such as forward bending and backward bending is not generally performed.

  Next, the operation of the configuration of the above-described spinal photography chair 10 will be described.

  In the spinal imaging chair 10 according to the present embodiment, the backrest 12 is rotatably supported by the seat 11 and is positioned substantially perpendicular to the seat 11 by the reclining mechanism 13 (for example, 10 degrees from the vertical position). Arrangement is possible from a position inclined backward) to a horizontal position on the same plane. At this time, the spinal radiography chair 10 is provided with the toppling prevention frame portion 36 on the base frame 15, so that the spine photographing chair 10 does not fall even if it is in a state of supporting the supine load.

  The X-ray detector 16 corresponding to the X-ray film can move between the seat portion 11 and the backrest portion 12. As a result, it is possible to shoot the supine front from the sitting side. That is, the spinal imaging chair 10 can perform a series of imaging without moving the patient.

  In addition, it is not necessary for the patient to move to the vicinity of the center of the imaging table at the time of front imaging, and the patient who is having a compression fracture is not forced to perform difficult operations that cause pain.

  In addition, once the spinal imaging chair 10 is seated on the chair, side-viewing in the sitting position, side-viewing in the supine position with the backrest 12 reclining, and front-viewing in the supine position can be performed. For this reason, it is possible to greatly shorten the time for patient movement and device setting.

  Conventionally, the geometrical arrangement of the X-ray irradiation unit 23, the subject 17, and the X-ray detector 16 in the X-ray bundle direction at the time of imaging of the sitting side surface is different from that at the time of imaging in the supine position. For this reason, the enlargement ratio has changed, and it has been difficult to accurately evaluate changes in the vertebral body. In addition, the image at the side view in the sitting position is difficult to compare with the image at the side view in the supine position because the spine is also rotated when the patient's posture is rotated. In addition, the long axis of the body also needs to be perpendicular to the X-ray, but when the patient's posture is rotated, the perpendicularity decreases.

  On the other hand, the spine photographing chair 10 performs side photographing of the sitting position and reclines the backrest portion 12 as it is. For this reason, the patient can photograph the side surface of the supine position without moving. In that case, since the geometrical arrangement of the X-ray irradiation unit 23, the subject 17, and the X-ray detector 16 in the X-ray bundle direction does not change, there is no difference in the captured image due to the difference in magnification between the sitting position and the supine position. .

  Further, the spine photographing chair 10 has a backrest portion 12 that is formed in a long length that extends to the headrest 27 provided on the opposite side of the seat portion 11 with respect to the rear side portion 18 of the seat portion 11. In the sitting position, the spine imaging chair 10 performs imaging in a state where the backrest 12 is slightly reclined (for example, tilted by about 10 °). Therefore, the patient can take an image while leaning on the backrest portion 12, and the back and both shoulders are in close contact with the backrest portion 12 in parallel as shown in FIG. As a result, the spine is less likely to be twisted during sitting position photography. Therefore, the perpendicularity with respect to the X-ray irradiation center is also improved. As a result, it is difficult for a difference to occur in the position at each shooting time, the images can be compared accurately, and an accurate diagnosis based on the shot images can be performed.

  Conventionally, when photographing a side surface in the supine position, the patient is brought as close to the end of the photographing table as possible. For this reason, since the patient moved to the end of the bed, there was a possibility of falling. On the other hand, the spinal imaging chair 10 can perform side imaging without moving a patient who is in a supine position by reclining as it is, so that the risk of patient falling associated with movement to the end of the imaging table is reduced.

  Further, in the base frame 15, the fall-preventing frame portion 36 is extended to the base frame portion 35 fixed to the lower end of the side plate opposite to the seat portion 11 in the pair of side plate portions 14. Even when lying on the back so that the backrest 12 is parallel to the floor during radiography, the patient's head does not tilt toward the floor like a seesaw, and is fixed to the base frame 35 of the base frame 15. Since the pair of side plate portions 14 firmly supports the seat portion 11, the seat portion 11 does not move in the head-to-tail direction of the patient, so that the patient can perform X-ray imaging in a recumbent position stably and stably. Can do.

  Further, in the spine imaging chair 10, a cushioning X-ray transmission mat 29 is provided on the seat portion 11 and the backrest portion 12, and the X-ray transmission mat 29 is the seat portion 11 and the backrest portion 12 at the time of X-ray imaging. It is formed with the thickness for the reflection prevention distance of the structure part which consists of this metal member. When the patient is supported by the seat portion 11 and the backrest portion 12, the patient is arranged away from the structural portion made of a metal member of the seat portion 11 and the backrest portion 12 by a reflection preventing distance. Accordingly, it is possible to easily prevent the structure portion from being reflected in the image during side photographing. Further, since the X-ray transmission mat 29 is made of a soft material with little X-ray absorption and has a thickness, it can be made difficult to cause pain even when a patient whose spine is overhanging sleeps.

  Further, in the spinal photography chair 10, the backrest portion 12 that is rotatably supported by the rotation center 20 at both side portions 28 of the seat portion 11 is the same from a position substantially perpendicular to the seat portion 11 by the reclining mechanism 13. The rotation is restricted (locked) at a plurality of inclination angles up to a horizontal position as a plane. The backrest 12 generates a rotational moment in the direction toward the horizontal position due to the load applied by the patient's back. When the backrest 12 is unlocked by the lock release lever 31, the backrest 12 starts rotating due to a load from the back, but the increase in the rotational speed is suppressed by the resistance of the oil damper 32. That is, the backrest portion does not fall suddenly, and the rotation speed to the next lock position is lower than that in the case of free rotation, and falls slowly.

  Further, the lock release lever 31 has a lever base 33 attached to the seat 11 on the lower side of the X-ray transmission mat 29. The lever release portion 31 of the lock release lever 31 is detached from the reclining mechanism 13 in the seat portion 11 when photographing from the side. As a result, the lock release lever 31 and the connecting portion of the reclining mechanism 13 to which the lock release lever 31 is attached are not separated from the reflection preventing distance and are not reflected in the image at the time of side shooting.

  In the spinal imaging chair 10, the patient first sits on the seat 11 in a sitting position. At this time, the base frame 15 is fixed by the stopper 38, and movement on the floor surface is restricted. As a result, the spinal imaging chair 10 does not move due to the load applied from the patient during the operation to the sitting position, and the patient can be seated safely. In addition, the spinal imaging chair 10 can be moved by the caster 37 while the patient is placed by releasing the restriction of the movement of the stopper 38 while supporting the patient. As a result, the spine imaging chair 10 is configured so that the distance between the lateral X-ray detector 24 installed separately from the X-ray detector 16 of the spine imaging chair 10 and the subject 17 is, for example, at the time of side imaging. Fine adjustment can be easily performed by the movement of 15.

  Further, in the spinal imaging chair 10, the bar base 50 of the holding bar 49 is freely rotatable by a bar base end rotation center 51 on at least one of both side portions 28 of the seat 11 below the X-ray transmission mat 29. It is supported by. By rotating the bar base 50, the bar base 50 can be arranged upright in a direction perpendicular to the seat portion 11. An arm rest portion 48 is rotatably connected to the tip of the bar base portion 50 around a bar folding rotation center 52. The bar folding rotation center 52 is perpendicular to the axis of the bar base 50 and perpendicular to the rotation center 20 (the same direction as the bar base end rotation center 51).

  The arm rest portion 48 can be unfolded from a folding position parallel to the bar base portion 50 to an arm portion holding position orthogonal to the bar base portion 50 by being rotated at the bar folding rotation center 52. The arm rest portion 48 is disposed at the arm portion holding position, and extends across the seat portion 11 from the tip of the bar base portion 50 erected from the seat portion 11 in a direction extending to both side portions 28 of the seat portion 11. Exists. The arm rest portion 48 that has reached the arm holding position extends right and left just in front of the chest of the patient when the patient sits on the seat 11. The patient places both arms on the arm rest 48 at the time of side view. As a result, the holding bar 49 prevents both arms from being reflected in the image during side surface photography. Further, at the time of side photographing, there is no need to force the patient to raise both arms high. Therefore, the patient does not twist the spine due to the pain caused by raising both hands at the time of sitting.

  In the spine photographing chair 10, the bar base 50 of the holding bar 49 is moved forward stepwise by, for example, a ratchet mechanism, and the distance from the chest can be adjusted. The bar base 50 is releasably locked at each rotational position. Thereby, it is possible to arrange the arm rest portion 48 at an optimal position for each patient having a different physique.

  Further, when the bar base 50 is disposed at the foremost position, the rotation restriction of the ratchet mechanism is released. When the rotation restriction of the bar base portion 50 is released, the holding bar 49 is rotated rearward in a state where the arm rest portion 48 is folded in parallel with the bar base portion 50, and is lower than the X-ray transmission mat 29. It is possible to move to the retreat position. Even if the holding bar 49 is arranged at the arm holding position, since the bar base end rotation center 51 is located in the vicinity of the patella, it is not reflected in the image in both the front shooting and the side shooting. Absent.

  In the spinal imaging chair 10, the X-ray detector 16 is interposed between the seat 11 and the backrest 12 in a state where the backrest 12 is rotated and the seat 11 and the backrest 12 are in the same plane. It is possible to move across. As a result, the spine imaging chair 10 can capture a desired image of the thoracic vertebra, lumbar vertebra, and sacrum with a single image (film) by the moved X-ray detector 16. In addition, even when a conventional flat imaging table is used, it is possible to photograph a desired portion across the thoracic vertebra, lumbar vertebra, and sacrum with a single film, but from a sitting position (chair) to a supine position ( It was necessary to move to the shooting stand. The spine imaging chair 10 can image these parts with a single film without the patient moving from the sitting position to the supine position.

  In this way, the spine imaging chair 10 can obtain an accurate image for diagnosing the number of lumbar vertebrae that causes pain. At this time, the region of the seat portion 11 and the backrest portion 12 corresponding to the movement range of the X-ray detector 16 is a metal non-use portion 47. In other words, in the spinal imaging chair 10, a structure portion that frequently uses metal members that require strength is concentratedly arranged, for example, on both side portions 28 that are out of the region corresponding to the movement range of the X-ray detector 16. This prevents a foreign object (metal member) from being reflected in the image during front-side shooting in the supine position, and an image that is easier to diagnose is obtained.

  Next, a spine photography chair 55 according to a modification will be described.

  FIG. 11 is a front view of a spinal radiography chair 55 including a holding bar 56 according to a modification including a pair of bar bases 50. The spinal photography chair 55 according to the modified example is provided with a bar base 50 and a bar base 57 on each of the pair of side portions 28 in the seat portion 11, and one of the pair of bar base 50 and bar base 57 (the bar base 50 ) Is connected to the arm rest portion 48. The arm rest portion 48 is releasably coupled to the other bar base portion 57 and the coupling portion 58. The bar base 50, the arm rest portion 48, and the bar base 57 constitute a holding bar 56.

  The joint structure of the arm rest portion 48 and the bar base portion 57 of the holding bar 56 forms, for example, a vertical plate piece on the tip side of the arm rest portion 48. On the upper end side of the holding bar 56, a vertically divided slit portion into which the vertical plate piece portion is inserted is formed. Further, a lock mechanism that can be released is provided across the vertical plate piece and the slit. As a result, the arm rest portion 48 can be coupled to the bar base portion 57 by inserting the vertical plate piece portion into the slit portion at the arm holding position and fixing the vertical plate piece portion and the slit portion by the lock mechanism. Become.

  In the holding bar 56 according to this modification, the pair of bar base portions 50 and the bar base portion 57 stand up from the same position in the front-rear direction of the pair of side portions 28 at the arm holding position. The arm rest portion 48 is connected to one of the pair of bar base portions 50, and is coupled to the distal end side (upper end side) of the other bar base portion 57 from which the distal end side stands. That is, the holding bar 56 has an arch shape (gate shape) with the seat portion 11 interposed therebetween. The holding bar 56 can increase the strength against the load applied to the arm rest portion 48.

  Further, in the holding bar 56 according to this modified example, the pair of bar base portions 50 and the bar base portion 57 stand with the patient in the sitting position interposed therebetween. Therefore, the patient is positioned (centered) at the center of the pair of side portions 28 in the seat portion 11 by sitting at the center between the pair of bar base portions 50 and the bar base portion 57. In other words, the pair of bar base 50 and bar base 57 can be used as a reference for centering the subject 17 during side shooting. By aligning the patient with the center of the seat 11, even in each patient with a different physique, a difference in position at each imaging time is less likely to occur. Thereby, at the time of side imaging of each patient, the geometrical arrangement of the X-ray irradiation unit 23, the subject 17, and the X-ray detector 16 can be made the same, and the difference in magnification can be made smaller. it can.

  Therefore, according to the spine imaging chair 10 according to the present embodiment, it is possible to reduce pain associated with movement / position change of the patient, improve examination throughput, and improve imaging reproducibility.

  As mentioned above, although embodiment was described referring drawings, it cannot be overemphasized that this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  Further, the structure of the holding bar is not limited to the holding bar 49 described in the above embodiment and the holding bar 56 described in the above modification. For example, in the above-described embodiment, the holding bar has, for example, a U-shaped shape in which a pair of bar bases facing each other (see, for example, the bar base 50 shown in FIG. 6) is connected. It may be one that can be fixed and released at a predetermined extraction position in the pair of side portions 28 sandwiching the rear side portion 18.

  Here, the holding bar which has this U-shaped shape and can be easily attached to and detached from the seat portion 11 will be described in detail.

  In this holding bar, a pair of connected bar bases (see, for example, the bar base 50 shown in FIG. 6) is inserted into a pair of holes (that is, a total of two holes) provided at the extraction positions of the side portions 28. The seat portion 11 can be removed by being inserted into or extracted from the pair of holes. Accordingly, in the spinal photography chair 10, the holding bar having the U-shaped shape can be easily removed from the seat, and further has a pair of bar bases connected to each other. At the time of X-ray imaging of the side, it is possible to contribute to a relaxed state at the time of X-ray imaging of the patient by extending both arms to the portion where the bar base is connected. In addition, the holding bar can be removed from the seat when taking X-rays when the patient is lying down, for example, thereby preventing reflection in the captured image and enabling high-precision diagnosis for doctors and radiographers. It becomes. The holding bar is not limited to a U-shape, and may be, for example, an L-shape.

  Further, in the spinal photography chair 10 of the present embodiment described above, the backrest portion 12 has been described as a long one having the headrest 27. However, for example, when the backrest 12 has a length sufficient to compensate for the length of the headrest 27, the backrest 12 of the spinal imaging chair 10 may not have the headrest 27. In other words, even when the patient sits on the spine imaging chair 10 and the backrest 12 is tilted rearward to be in a supine posture, the length of the headrest 27 shown in FIG. Since the backrest portion 12 is formed to be long in the vertical direction, the backrest portion 12 can safely support the back of the patient's head, so that the patient does not fall backward.

DESCRIPTION OF SYMBOLS 10 ... Spine photography chair 11 ... Seat part 12 ... Backrest part 13 ... Reclining mechanism 14 ... Side plate part 15 ... Base frame 16 ... X-ray detector 18 ... Rear side part 20 ... Center of rotation 27 ... Headrest 28 ... Both side parts 29 ... X-ray transmission mat 31 ... Lock release lever 32 ... Oil damper (damper)
33 ... Lever base 34 ... Side plate lower end 35 ... Base frame portion 36 ... Tipping prevention frame portion 37 ... Caster 38 ... Stopper 47 ... Metal non-use portion 48 ... arm rest portion 49 ... Holding bar 50 ... Bar base portion 51 ... Bar base end Rotation center 52 ... Bar folding rotation center

Claims (11)

A rectangular plate-like seat arranged parallel to the floor surface;
A backrest that is rotatably supported at the center of rotation in the direction along the rear side of the seat;
A reclining mechanism that locks the backrest portion at a plurality of inclination angles from a position substantially perpendicular to the seat portion to a horizontal position that is in the same plane;
An X-ray detector that is supported in parallel and slidably close to the lower surface of the seat portion and is movable between the seat portion and the backrest portion that are in the same plane;
Spine chair. The spinal photography chair according to claim 1,
A headrest is further provided on the side opposite to the seat with respect to the rear side,
Spine chair. The spinal imaging chair according to claim 1 or 2,
In the seat portion and the backrest portion, a cushioning X-ray transmission mat having a thickness equal to the reflection preventing distance from the contact surface to the human body is attached to the human body support surface side.
Spine chair. The spinal photography chair according to any one of claims 1 to 3,
The reclining mechanism is provided with a damper that suppresses the rotation of the backrest portion, and a lock release lever that stands upright from the seat portion and unlocks the backrest portion,
The lock release lever is removably attached from the seat.
Spine chair. The spinal imaging chair according to any one of claims 1 to 4,
A holding bar is attached to the seat,
The holding bar is
A bar base portion rotatably supported by at least one of a pair of side portions sandwiching the rear side portion at a bar base end rotation center in the same direction as the rotation center;
An arm rest that is rotatably coupled to the tip of the bar base at a bar folding rotation center in a direction perpendicular to the axis of the bar base;
Spine chair. The spinal photography chair according to claim 5,
The bar base is provided on each of the pair of side portions of the seat,
The arm rest is connected to one of the pair of bar bases,
The arm rest is releasably coupled to the other bar base,
Spine chair. The spinal imaging chair according to any one of claims 1 to 4,
A holding bar having a pair of bar bases fixed and unfixed at each position of the pair of side sides sandwiching the rear side part, and detachably connected to the seat part, is attached.
Spine chair. The spinal photography chair according to any one of claims 5 to 7,
The bar base is releasably locked at a plurality of rotational positions;
Spine chair. The spinal photography chair according to any one of claims 1 to 8,
In the seat and the backrest, the region corresponding to the movement range of the X-ray detector is a metal non-use part excluding the metal member,
Spine chair. The spinal photography chair according to any one of claims 1 to 9,
A pair of side plate portions that support a pair of side portions sandwiching the rear side portion;
A base frame portion is fixed to a lower side plate lower side opposite to the seat portion of the side plate portion, and a headrest provided on the backrest portion is lowered by a lateral load applied to the backrest portion that is flush with the seat portion. A base frame extending to the base frame part, the frame part for preventing overturning that supports the rotational moment in the direction,
Spine chair. The spinal photography chair according to claim 10,
A plurality of casters for supporting the base frame movably on the floor surface and a stopper for restricting movement of the base frame on the floor surface are provided on the base frame.
Spine chair.

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