JP2010068858A - Bed apparatus and x-ray ct apparatus - Google Patents

Abstract

A bed apparatus and an X-ray CT apparatus having a drive unit that can accurately position a subject in a vertical direction with respect to a body axis and that can be easily applied to an existing apparatus.
A top plate 41 on which a subject P is placed, a bed 50 that supports the top plate 41 so as to be movable in a vertical direction and a longitudinal direction, and a bed 50 that is disposed below the bed 50 are provided. 41, and a bed support table 60 having a width drive unit 61 that is movably supported in the width direction of 41. The width movement drive unit 61 receives a rotational driving force from a motor 611 that is a drive source for moving the bed 50. Then, it is converted into a linear driving force in the width direction of the top plate 41 and transmitted to the bed 50 by transmission means arranged in the vicinity of the motor 611 in the longitudinal direction of the top plate 41.
[Selection] Figure 1

Description

  The present invention relates to a bed apparatus and an X-ray CT apparatus used for diagnostic imaging.

  Examples of image diagnostic apparatuses that perform image diagnosis by photographing a subject include an X-ray CT apparatus, an MRI apparatus, a PET apparatus, and an X-ray diagnostic apparatus. This diagnostic imaging apparatus includes a gantry having an opening for performing imaging, and imaging of a subject lying on the opening is performed. An X-ray diagnostic apparatus for a circulator has an imaging unit including an X-ray generator and an X-ray detector arranged to face the C-shaped end, and the X generator and the X-ray detector. The subject is photographed in the interval (opening). Then, the movement of the subject to the opening is performed by placing the subject on the top plate of the bed apparatus arranged in the vicinity of the opening and moving the top into the opening.

  By the way, in the case of imaging using an X-ray CT apparatus, a driving unit that moves the top plate in the vertical direction and the longitudinal direction is provided in the bed device, and the bed moves the top plate into an opening that is separated from the bed device by the driving unit. An apparatus is known (for example, refer to Patent Document 1).

In this bed apparatus, the top plate on which the subject is placed is moved to the opening in the longitudinal direction to position the subject in the body axis direction at the imaging region. Then, when the imaging part of the subject that has moved into the opening is displaced in the width direction of the top plate from the imaging center where a clear image is obtained, the top plate or the subject is moved in the width direction by hand and the body axis direction Is positioned in the vertical direction.
JP 2008-22886 A

  However, the method of moving the tabletop or the subject by hand has a problem that the subject cannot be accurately positioned in the direction perpendicular to the body axis direction. In order to solve this problem, it is conceivable to provide a drive unit that moves in the width direction in addition to the drive unit that moves the top plate in the longitudinal direction and the vertical direction.

  On the other hand, there is a demand for a bed apparatus that can accurately perform the positioning in the width direction from a facility where the bed apparatus is already operating. However, if it is attempted to replace the bed apparatus in operation with a bed apparatus provided with a drive unit that moves in the vertical direction, the longitudinal direction, and the width direction, there is a problem that costs increase.

  The present invention has been made in order to solve the above-described problems. A drive unit that can accurately perform the positioning in the vertical direction with respect to the body axis of the subject and can easily cope with an existing apparatus. An object of the present invention is to provide a bed apparatus and an X-ray CT apparatus having the bed apparatus.

  In order to solve the above problem, the bed apparatus of the present invention according to claim 1 includes a top plate on which a subject is placed, a bed that supports the top plate movably in the vertical direction and the longitudinal direction, A bed support table is provided below the bed and supports the bed so as to be movable in the width direction of the top plate.

  The X-ray CT apparatus of the present invention according to claim 9 is a position where the subject placed on the top plate can be X-rayed with the imaging apparatus using the bed apparatus according to claim 1. It is characterized by moving to.

  According to the present invention, the subject is provided by providing a bed support table that supports the couch so as to be movable in the width direction of the couch, below the couch that supports the couch so as to be movable in the vertical direction and the longitudinal direction. The positioning in the direction perpendicular to the body axis direction can be performed with high accuracy. Also, by positioning the bed support on the lower side of the bed where the top plate cannot be moved in the width direction other than existing manual operation, positioning in the direction perpendicular to the body axis direction at the imaging region of the subject is performed. The cost for performing with high accuracy can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

An embodiment of an X-ray CT apparatus according to the present invention will be described with reference to FIGS.
FIG. 1 is a block diagram showing a configuration of an X-ray CT apparatus 200 according to an embodiment of the present invention. The X-ray CT apparatus 200 includes an imaging unit 1 that performs X-ray imaging of a subject P, a bed unit 40 that moves the subject P to a position where X-ray imaging can be performed by the imaging unit 1, and the imaging unit 1 and the bed. An operation unit 8 that operates the unit 40 and a system control unit 9 that controls the photographing unit 1 and the bed unit 40 based on an input signal from the operation unit 8 are provided.

  The imaging unit 1 generates a frame unit 2 that generates X-ray projection data by X-ray imaging of the subject P, and generates and displays two-dimensional or three-dimensional image data from the X-ray projection data generated by the frame unit 2. And an image processing unit 3.

  The gantry 2 includes a substantially cylindrical opening 2a into which the subject P is inserted by the bed 40, and an imaging center 10a that provides clear image data around the subject P inserted into the opening 2a. , And a fixed portion 20 that rotatably supports the rotating portion 10.

  The rotating unit 10 is disposed on the outer periphery of the opening 2a, and an X-ray generating unit 11 that irradiates X-rays, a high voltage generating unit 12 that supplies a high voltage to the X-ray generating unit 11, and an X-ray that detects X-rays. A detector 13, a data collection unit 14 that collects detection signals detected by the X-ray detector 13 and generates X-ray projection data, and an X-ray projection data generated by the data collection unit 14 is converted into an image processing unit 3. The transmission unit of the data transmission unit 15 for output to the X-ray generator 11, the high voltage generation unit 12, the X-ray detector 13, the data collection unit 14, and the transmission unit of the data transmission unit 15 are rotatably held. The rotating frame 16 is provided.

  The X-ray generation unit 11 includes an X-ray tube, generates X-rays with a high voltage supplied from the high voltage generation unit 12, and irradiates the subject P with X-rays while rotating. The X-ray detector 13 has an X-ray detection element, and is disposed to face the X-ray generation unit 11. Then, X-rays transmitted through the subject P by X-ray irradiation from the X-ray generation unit 11 are detected and converted into electrical signals, and the converted signals are amplified and output to the data collection unit 14.

  The data collection unit 14 includes an analog / digital conversion circuit and the like, and is disposed on the outer periphery of the X-ray detector 13. Then, the signal output from the X-ray detector 13 is converted into a digital signal, and the converted digital signal is collected at every predetermined imaging angle rotation of the rotating unit 10 to generate X-ray projection data.

  The data transmission unit 15 includes, for example, a transmission unit and a reception unit for transmitting and receiving by optical communication means, the transmission unit is provided in the rotation unit 10, and X-ray projection data from the data collection unit 14 is transmitted from the transmission unit. The data is transmitted to a receiving unit provided in the fixed unit 20.

  The fixing unit 20 includes a rotating mechanism control unit 21 and a receiving unit of the data transmission unit 15 and supports the rotating frame 16 of the rotating unit 10 to be rotatable. Then, the reception unit of the data transmission unit 15 outputs the X-ray projection data received from the transmission unit to the image processing unit 3.

  The image processing unit 3 stores the X-ray projection data output from the data transmission unit 15 of the gantry unit 2 and reconstructs the X-ray projection data stored in the storage unit 31 to perform two-dimensional A reconstruction unit 32 that generates three-dimensional image data, and a display unit 33 that displays each image data generated by the reconstruction unit 32 are provided.

  As shown in FIG. 2, the bed unit 40 includes a top board 41 on which the subject P is placed, a bed 50 that supports the top board 41 so as to be movable in the vertical direction and the longitudinal direction, and a lower side of the bed 50. The bed support 60 is disposed and supports the bed 50 so as to be movable in the width direction of the top board 41.

  The bed 50 includes a vertical movement drive unit 51 that moves the top plate 41 in the vertical direction, a long manual drive unit 52 that moves the top plate 41 in the longitudinal direction, and a vertical movement control unit 53 that controls the vertical movement drive unit 51. And a long manual control unit 54 for driving and controlling the long manual drive unit 52. In addition, the bed support table 60 includes a width movement drive unit 61 that moves and drives the bed 50 in the width direction of the top plate 41 and a width movement control unit 62 that drives and controls the width movement drive unit 61.

  The operation unit 8 includes an input device such as a keyboard, a display panel, and the like. The operation unit 8 performs an input operation for imaging conditions for performing X-ray imaging, an input operation for moving the top plate 41 and the bed 50 of the bed unit 40, and the like. I do.

  The system control unit 9 includes a CPU, a storage circuit, and the like, and controls the X-ray imaging of the imaging unit 1 and the movement of the top board 41 and the bed 50 of the bed unit 40 based on an input operation from the operation unit 8. Control the entire system such as control.

  Next, with reference to FIG. 1 thru | or FIG. 7, the detail of a structure of the bed support stand 60 in the bed part 40 is demonstrated. FIG. 3 is a diagram showing details of the configuration of the bed support table 60. FIG. 4 is a diagram illustrating details of the configuration of the width driving unit 61 in the bed support 60. FIG. 5 is a diagram illustrating the arrangement of the vertical movement control unit 53 and the long manual control unit 54 of the bed 50 and the width movement control unit 62 of the bed support 60. FIG. 6 is a diagram illustrating another example of a part of the width driving unit 61. FIG. 7 is a diagram illustrating the wiring of the power cable of the bed unit 40.

  3, FIG. 3 (a) is a side view of the bed support 60, and FIG. 3 (b) is a cross-sectional view taken along line AA in FIG. 3 (a). The bed support table 60 is disposed between the bed 50 and the floor, and has, for example, four foot switches 63 for operating the top plate 41 to move in the vertical direction and the longitudinal direction, a width motion driving unit 61, and a width motion control unit 62. And a rectangular plate-like frame 64 that supports the foot switch 63, the width movement drive unit 61, the width movement control unit 62, and the like, and the arrow L1 direction that is the width direction of the top plate 41 and the L1 direction The plate-shaped upper plate 65 is supported from the lower side so as to be movable in the arrow L2 direction, which is the opposite direction, and the LM (Linear Motion) guide 66 assists the movement of the upper plate 65 in the L1 direction and L2. .

  The foot switch 63 is an operation for moving the top plate 41 up and down so that the subject P can easily get on and off, and an operation for moving the top plate 41 in the direction of the arrow L3 in order to move the subject P to the opening 2 a of the gantry 2. And the length near one end in the longitudinal direction of the frame 64 so that the operation of moving the top plate 41 moved to the opening 2a in the direction of the arrow L4, which is the direction opposite to the L3 direction, is possible from the side of the gantry 2 Arranged on both sides of the side. Moreover, it arrange | positions at the both edges of the long side near the other end part.

  The width drive unit 61 is disposed at a position close to the edge of the frame 64 and the center of gravity of the bed 50 other than the position at which the foot switch 63 is disposed in the longitudinal direction of the frame 64. Here, it is in the vicinity of the foot switch 63 arranged on one end portion side of the frame 64 and in the vicinity of one edge of the long side of the frame 64.

  FIG. 4 is a diagram showing details of the configuration of the width driving unit 61. The width drive unit 61 includes a motor 611 that is a drive source for moving the bed 50 in the L1 direction and the L2 direction, a drive gear 612 that is fixed to the rotation shaft of the motor 611, and the motor 611. A belt 613 that is disposed in the vicinity of the longitudinal direction of the plate 41 and is a transmission means for converting the rotational driving force from the motor 611 into a linear driving force in the width direction of the top plate 41 and transmitting it to the bed 50, an input gear 614, The screw shaft 615, the nut 616, and the slide plate 617 are configured.

  Further, the width driving unit 61 releases the two bearings 618 that rotatably hold the screw shaft 615, the electromagnetic brake 619 that prevents the screw shaft 615 from rotating, and the rotation prevention of the screw shaft 615 by the electromagnetic brake 619. A brake release lever 620, a manual terminal 621 for manually rotating the screw shaft 615, a rectangular plate-shaped first support plate 622 that supports the motor 611, the bearing 618, and the electromagnetic brake 619 from below, The first support plate 622 is configured by, for example, four bolts 623 that fix the first support plate 622 on the frame 64.

  The motor 611 is, for example, a servo motor provided with a speed reducer, and a drive gear 612 is fixed to one end portion of a rotating shaft arranged in parallel with the width direction of the top plate 41. Then, the rotational driving force is transmitted to the driving gear 612.

  The belt 613 is disposed parallel to the longitudinal direction of the top plate 41 and is wound around the drive gear 612 and the input gear 614. Then, the rotational driving force from the drive gear 612 is transmitted to the input gear 614.

  A screw shaft 615 that holds the input gear 614 at one end is disposed in the vicinity of the motor 611 in parallel with the rotation shaft, and is rotatably held by the bearing 618. For example, a helical thread groove is formed on the outer peripheral surface other than the vicinity of both ends, and the rotational driving force from the input gear 614 is transmitted to the nut 616.

  For example, the nut 616 has a spiral thread groove formed on the inner peripheral surface thereof, and is movably engaged along the screw shaft 615 via a plurality of balls held between the thread groove and the thread groove of the screw shaft 615. Match. Then, the rotational driving force from the screw shaft 615 is converted into a linear driving force capable of accurate fine feed in the L1 and L2 directions, and transmitted to the slide plate 617.

  The slide plate 617 is connected to a nut 616 disposed on the lower side and an upper plate 65 disposed on the upper side. Then, the linear driving force from the nut 616 is transmitted to the upper plate 65.

  The electromagnetic brake 619 is disposed in the vicinity of the other end portion of the screw shaft 615 and prevents the screw shaft 615 from rotating after the motor 611 stops rotating.

  The brake release lever 620 is disposed so as to protrude from the frame 64 and the first support plate 622 in the L1 direction so that the operation can be easily performed. Then, when the rotation of the motor 611 is stopped, the function of preventing the rotation of the screw shaft 615 of the electromagnetic brake 619 is released by turning in one direction. Further, by rotating in the other direction, the function of preventing the rotation of the screw shaft 615 of the released electromagnetic brake 619 is restored.

  The manual terminal 621 is fixed to the other end of the screw shaft 615, and is disposed so as to protrude from the frame 64 and the first support plate 622 in the L1 direction so that the operation can be easily performed. Then, after turning the brake release lever 620 in one direction, the screw shaft 615 can be manually rotated by turning it using a tool that engages with the manual terminal 621.

  Thus, by providing the brake release lever 620 and the manual terminal 621, the top plate 41 can be manually moved in the width direction even when the bed support base 60 breaks down and cannot be moved electrically.

  The first support plate 622 is detachably disposed near the edge of the frame 64 at a position close to the center of gravity of the bed 50 as shown in FIG. 5 except for the foot switch 63 in the longitudinal direction of the frame 64, and is disposed at the four corners. It is fixed on the frame 64 by a bolt 623. Then, when the bolt 623 is removed, it can be pulled out from the frame 64 in the L1 direction.

  In this way, by arranging the width driving unit 61 in the vicinity of the edge of the frame 64 and pulling out the first support plate 622, maintenance in the width driving unit 61 and replacement of parts at the time of failure can be performed. Thereby, attachment / detachment of the width drive part 61 becomes easy and work can be performed rapidly.

  Further, by disposing the transmission means in the vicinity of the motor 611 arranged so that the rotation axis is parallel to the width direction of the top plate 41, the screw shaft 615 is parallel to the rotation axis of the motor 611. The installation area of the width drive unit 61 can be reduced. Moreover, since the bed 50 can be stably moved with a small driving force by arranging the width driving unit 61 at a position near the center of gravity of the bed 50 on the frame 64, a small motor 611 can be used. it can. Accordingly, the width driving unit 61 can be made compact, and the height of the bed support base 60 can be kept low. Therefore, the vertical movement that does not require a device for lowering the minimum height of the top board 41 is possible. A bed 50 provided with a drive unit 51 can be used.

  In addition, it is easy to get on and off the top board by installing the bed support base 60 on the lower side of the bed where the top board cannot be moved in the width direction except by manual operation of the already operating X-ray CT apparatus. The top plate can be accurately moved in the width direction without impairing the movement.

  3 is arranged in the vicinity of the edge of the frame 64 other than the foot switch 63 and the width driving unit 61 in the longitudinal direction of the frame 64. In addition, the vertical movement control unit 53 and the long manual control unit 54 arranged in the bed 50 are arranged at positions separated by a predetermined distance that can avoid the influence of electromagnetic noise due to resonance.

  Here, it is arranged in the vicinity of one edge on the long side near the center in the longitudinal direction of the frame 64. At this position, as shown in FIG. 5, the long manual control unit 54 disposed in the upper part of the bed 50 and the vertical movement control unit 53 disposed in the vicinity of the lower end portion in the L4 direction are separated by a predetermined distance or more. . Further, the long manual control unit 54 and the vertical movement control unit 53 are also arranged apart from each other by a predetermined distance.

  The width control unit 62 includes a driver 625 for driving and controlling the motor 611 of the width drive unit 61, a rectangular plate-shaped second support plate 626 that supports the driver 625, and the second support plate 626. For example, two bolts 627 for fixing the frame on the frame 64.

  The second support plate 626 is fixed on the frame 64 by bolts 627 disposed at two corners near the edge of the frame 64. When the bolt 627 is removed, it can be pulled out from the frame 64 in the L1 direction.

  Thus, by arranging the width movement control unit 62 in the vicinity of the edge of the frame 64 and pulling out the second support plate 626, maintenance of the width movement control unit 62 and replacement of parts at the time of failure can be performed. Thereby, attachment / detachment of the width movement control part 62 becomes easy, and work can be performed quickly.

  Further, by arranging the vertical movement control unit 53, the long manual control unit 54, and the width movement control unit 62 at a predetermined distance, the influence of electromagnetic noise can be avoided.

  The upper plate 65 is arranged on the upper side of the width drive unit 61, the width control unit 62, the foot switch 63, the frame 64, and the LM guide 66, and supports the bed 50 so as to be movable in the L1 direction and the L2 direction.

  A plurality of LM guides 66 are arranged in the longitudinal direction of the frame 64. Each of the LM guides 66 is, for example, an LM rail fixed on the frame 64 in parallel with the width direction of the top plate 41, and an upper plate 65 that engages with the LM rail. The LM slider is fixed to the lower surface of the LM, and an LM rail including a plurality of balls and a retainer disposed between the balls, and a ball retainer disposed between the LM sliders. Then, the LM slider slides smoothly along the LM slider via the ball retainer.

  As described above, by arranging the LM guide 66 between the frame 64 and the upper plate 65, the upper plate 65 can be accurately moved in the L1 direction and the L2 direction.

  As shown in FIG. 6, a part of the plurality of LM guides 66 is fixed on the frame 64 by replacing the LM rail of the LM guide 66 with a C-type guide rail, and the LM slider of the LM guide 66 is attached to the CLM guide 66. By replacing the cam follower that engages with the mold guide rail and fixing it to the lower surface of the upper plate 65, the same effects as those of the LM guide 66 can be obtained.

Next, power supply wiring in the bed unit 40 will be described.
FIG. 7 is a diagram showing the wiring of the power cable of the bed unit 40. The bed unit 40 is supplied with power from a single power cable connected to the gantry unit 2. The power cable is led inward from one end outer side of the bed part 40 close to the gantry part 2.

  In the bed part 40, it is possible to cut off the supply of power from the gantry part 2 when an abnormal current connected to the power cable led from the outside of one end part of the bed 50 to the inside flows in the bed 50. A circuit protector (CP) 55 and a line filter (LF) 56 for preventing electromagnetic noise between the CP 55 and the vertical movement control unit 53 and the long manual control unit 54 are provided. And the power cable which supplies electric power to the vertical movement control part 53 and the long manual control part 54 after LF56 is extended outside from the other end part inside the bed 50, and the extended power cable is the bed on the same side as the outside. The end of the support base 60 is guided from the outside to the inside and connected to the width control unit 62.

  In this way, one power cable connected to the gantry unit 2 is led from the outside of one end of the bed 50 to the inside and extended from the inside of the other end to the outside, and the extended power cable is placed on the same side as the outside of the bed. By guiding from the outer end of the support base 60 to the inner side, it is possible to avoid duplication of power cables and reduce electromagnetic noise. Moreover, electrical components such as CP55 and LF56 in the bed support table 60 can be reduced.

  Note that a couch support 60 is installed below the couch for a couch that cannot be moved in the width direction except for manual operation of an already operating X-ray CT apparatus. Then, the power cable that is led from the outside of one end of the bed to the inside and supplies power to the vertical movement control unit and the long manual control unit is extended from the inside of the other end to the outside, and the extended power cable is the same as the outside. The end of the side bed support 60 is led from the outside to the inside to be connected to the width control unit 62. Thereby, an electromagnetic noise can be reduced avoiding duplication with an existing cable.

Hereinafter, an example of the operation of the X-ray CT apparatus 200 will be described with reference to FIGS. 1 to 7.
When the operation of lowering the top board 41 from the operation unit 8 (or the foot switch 63 of the bed support base 60 in the bed part 40) is performed, the vertical movement drive part 51 of the bed 50 lowers the top board 41 to the minimum height. Stop.

  When an operation for raising the top plate 41 from the operation unit 8 is performed after the subject P is placed on the top plate 41 so that the direction of the body axis is parallel to the longitudinal direction, the vertical movement drive unit 51 is The top plate 41 is raised to the height of the opening 2a of the gantry 2 and stopped.

  Then, when an operation for positioning the imaging region of the subject P in the body axis direction is performed from the operation unit 8, the long manual drive unit 52 moves the top 41 in the L3 direction to move the imaging region in the body axis direction. The top plate 41 is stopped at a position where the position coincides with the photographing center 10a in the opening 2a. Next, when an operation for positioning the imaging region of the subject P in a direction perpendicular to the body axis direction is performed from the operation unit 8, the width driving unit 61 of the bed support table 60 moves the bed 50 to move the top plate. 41 is moved in the L1 direction or the L2 direction, and the top 41 is stopped at a position where the position of the imaging region in the vertical direction coincides with the imaging center 10a in the opening 2a.

  When an imaging operation is performed from the operation unit 8 after the top 41 is stopped, the gantry unit 2 generates X-ray projection data of the subject P and outputs it to the image processing unit 3. The image processing unit 3 processes the X-ray projection data output from the gantry unit 2 to generate image data, and displays the generated image data.

  As described above, it is possible to accurately position the imaging region in the direction perpendicular to the body axis direction and the body axis direction of the subject P.

  According to the embodiment of the present invention described above, the bed 50 supports the top plate 41 movably in the vertical direction and the longitudinal direction, and the bed 50 supports the bed 50 movably in the width direction of the top plate 41. By arranging the support base 60, the top plate 41 can be accurately moved in the width direction. Further, by installing the bed support base 60 on the lower side of the bed where it is impossible to move the top board in the width direction except for the manual operation that is already in operation, the top board can be moved in the width direction with high accuracy. it can.

  Further, in the width driving unit 61 that drives the bed 50, the screw shaft 615 is located near the rotation axis of the motor 611 in the vicinity of the motor 611 arranged so that the rotation axis is parallel to the width direction of the top plate 41. By disposing the transmission means so as to be parallel, the installation area of the width driving unit 61 can be reduced. Moreover, since the bed 50 can be stably moved with a small driving force by arranging the width driving unit 61 at a position near the center of gravity of the bed 50 on the frame 64, a small motor 611 can be used. it can.

  Accordingly, the width driving unit 61 can be made compact, and the height of the bed support base 60 can be kept low. Therefore, the vertical movement that does not require a device for lowering the minimum height of the top board 41 is possible. A bed 50 provided with a drive unit 51 can be used. In addition, by installing the bed support base 60 on the lower side of the bed where it is impossible to move the top board in the width direction other than the manual operation that is already in operation, the ease of getting on and off the top board is not impaired, The top plate can be accurately moved in the width direction.

  Further, by arranging the wide driving unit 61 in the vicinity of the edge of the frame 64 and pulling out the first support plate 622, maintenance in the wide driving unit 61 and replacement of parts at the time of failure can be performed. Further, by arranging the width movement control unit 62 in the vicinity of the edge of the frame 64 and pulling out the second support plate 626, maintenance of the width movement control unit 62 and replacement of parts at the time of failure can be performed. Thereby, attachment / detachment of the width drive unit 61 and the width control unit 62 is facilitated, and the work can be performed quickly.

  Further, by providing the brake release lever 620 and the manual terminal 621 of the width driving unit 61, the top plate 41 can be manually moved in the width direction even when the bed support 60 is broken and cannot be moved electrically. Can do.

  Further, by arranging the vertical movement control unit 53, the long manual control unit 54, and the width movement control unit 62 at a predetermined distance, the influence of electromagnetic noise can be avoided.

  Also, one power cable connected to the gantry 2 is guided from the outside of one end of the bed 50 to the inside and extended from the inside of the other end to the outside, and the extended power cable is placed on the same side as the bed support stand. By guiding inward from the outer end of 60, it is possible to avoid duplication of power cables and reduce electromagnetic noise. Moreover, electrical components such as CP55 and LF56 in the bed support table 60 can be reduced. In addition, a power cable that is led from the outside of one end of the bed to the inside where the top plate cannot be moved in the width direction except for manual operation that is already in operation and supplies power to the vertical movement control unit and the long manual control unit. Extending from the inside of the other end to the outside, leading the extended power cable from the outside of the end of the bed support 60 on the same side to the outside and connecting it to the width control unit 62, Electromagnetic noise can be reduced by avoiding duplication.

  As described above, the positioning in the direction perpendicular to the body axis direction in the imaging region of the subject P can be performed with high accuracy. In addition, by placing the bed support base 60 below the bed where the top plate cannot be moved in the width direction other than the existing manual operation, the vertical direction with respect to the body axis direction of the imaging region of the subject P can be obtained. The cost for performing positioning accurately can be reduced.

The block diagram which shows the structure of the X-ray CT apparatus which concerns on the Example of this invention. The figure which shows the external appearance of the bed part which concerns on the Example of this invention. The figure which shows the detail of a structure of the bed support stand which concerns on the Example of this invention. The figure which shows the detail of a structure of the width drive part which concerns on the Example of this invention. The figure which shows arrangement | positioning of the vertical movement control part and long manual control part of the bed which concern on the Example of this invention, and the width movement drive part and width movement control part of a bed support stand. The figure which shows the other example of the one part unit of the width drive part which concerns on the Example of this invention. The figure which shows the wiring of the power cable of the bed part which concerns on the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 imaging | photography part 2 mount part 2a opening part 3 image processing part 8 operation part 9 system control part 10 rotation part 10a imaging | photography center 11 X-ray generation part 12 high voltage generation part 13 X-ray detector 14 data collection part 15 data transmission part 16 Rotating frame 20 Fixed part 21 Rotating mechanism control part 40 Bed part 41 Top plate 50 Bed 51 Vertical movement drive part 52 Long manual drive part 53 Vertical movement control part 54 Long manual control part 60 Bed support base 61 Wide movement drive part 62 Wide movement Control unit 200 X-ray CT apparatus

Claims (9)

A top plate on which the subject is placed;
A bed that supports the top plate so as to be movable in the vertical direction and the longitudinal direction;
A bed apparatus comprising: a bed support table disposed below the bed and supporting the bed so as to be movable in a width direction of the top plate. The bed support table includes a width driving unit that drives the bed to move in the width direction,
The width driving unit is disposed near the longitudinal direction of the motor that is a driving source for moving the bed, and the rotational driving force from the motor is linearly driven in the width direction. The bed apparatus according to claim 1, further comprising a transmission unit that converts the force into the bed and transmits the force to the bed. The transmission means includes
An input gear paired with a drive gear fixed to the rotating shaft of the motor arranged in parallel with the width direction;
A belt wound around the drive gear and the input gear;
A screw shaft that is arranged in parallel to the rotation shaft and that holds the input gear, and a nut that is movably engaged in the width direction by rotation of the screw shaft;
The bed apparatus according to claim 2, further comprising a slide plate connected to an upper plate that supports the nut and the bed from below. The width drive unit is
A brake disposed close to the screw shaft and preventing rotation of the screw shaft after rotation of the motor has stopped;
A release lever for releasing rotation prevention of the screw shaft by the brake;
The bed apparatus according to claim 3, further comprising a manual terminal that is fixed to an end of the screw shaft and rotates the screw shaft released by the release lever. A foot switch for operating movement of the top plate in the vertical direction and the longitudinal direction of the top plate disposed in the vicinity of the end portion in the longitudinal direction of the frame supporting the width driving unit, the motor fixed on the frame, and the A first support plate for supporting the transmission means;
The said 1st support plate is arrange | positioned so that attachment or detachment is possible in the position close | similar to the edge of the said flame | frame and the gravity center of the said bed other than the said foot switch in the longitudinal direction of the said flame | frame. Sleeper equipment. A driver for controlling the motor and a second support plate for supporting the driver;
The said 2nd support plate is arrange | positioned so that attachment or detachment is possible in the vicinity of the said frame edge other than the said foot switch and the said 1st support plate in the longitudinal direction of the said frame. Sleeper device. A vertical movement control unit that drives and controls a vertical movement drive unit that drives the top plate arranged in the bed in the vertical direction, and a long manual control unit that drives and controls a long manual drive unit that drives the top plate in the longitudinal direction. And a width control unit that drives and controls the width control unit disposed in the bed support table,
The width movement control unit extends the power cable for supplying power to the vertical movement control unit and the long manual control unit guided from the outside of one end of the bed to the outside and extends from the inside of the other end to the outside. The bed apparatus according to claim 2, wherein the bed apparatus is connected to a power cable led to the inside from the outside of the end portion of the bed support table on the same side as the outside.   The vertical movement control unit, the long manual control unit, and the width movement control unit are arranged at positions separated from each other by a predetermined distance that can avoid the influence of electromagnetic noise due to resonance with each other. Item 8. The bed apparatus according to item 7.   An X-ray CT apparatus, wherein the subject placed on the top plate is moved to a position where X-ray imaging can be performed by an imaging apparatus using the bed apparatus according to claim 1.

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