JP2015223245A - X-ray fluoroscopic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray fluoroscopic apparatus capable of further increasing a rotation angle range of a top plate.SOLUTION: A control part 30 includes a movement amount restriction part 31 for restricting a movement amount of a photographic system by a photographic system movement mechanism 53 within a restricted region around a photographing reference position, and a rotation range determination part 32 for determining a range of rotation of a top plate by a rotation mechanism 52 on the basis of the restricted region restricted by the movement amount restriction part 31 so as to prevent interference between the photographic system or the top plate and a ceiling or a floor surface. The control part 30 is connected to an in-hospital network 39 that stores data. The control part 30 is also connected to an input part 20 for performing various kinds of input.

Description

  The present invention relates to an X-ray fluoroscopic apparatus that performs X-ray imaging or X-ray fluoroscopy, and more particularly to an X-ray fluoroscopic apparatus capable of tilting a top plate on which a subject is placed.

  Such an X-ray fluoroscopic imaging apparatus is irradiated from an X-ray tube, an X-ray tube that irradiates X-rays toward the subject placed on the top plate, and a top plate on which the subject is placed. And an X-ray detector such as a flat panel detector for detecting X-rays that have passed through the subject. The top plate is rotated about an axis that is orthogonal to the longitudinal direction of the top plate and faces the horizontal direction, together with an imaging system including an X-ray tube and an X-ray detector, by a rotation mechanism. Further, the top plate is moved up and down together with the photographing system by the lifting mechanism. Further, the photographing system reciprocates in the longitudinal direction of the top plate with respect to the top plate by the photographing system moving mechanism.

  In such an X-ray fluoroscopic apparatus, any end of the top plate in the longitudinal direction may collide with the ceiling or the floor as the top plate rotates. In addition, in the over tube type in which the X-ray tube is disposed above the top plate as the top plate rotates, the X-ray tube is in the over tube type, and the under tube type in which the X-ray detector is disposed above the top plate. In some cases, the X-ray detector may collide with the ceiling.

  For this reason, in a conventional X-ray fluoroscopic apparatus, in order to prevent the imaging system or the top plate and the ceiling or floor from interfering with each other, when the top plate is rotated, the X-ray tube and the X-ray are automatically set. The imaging system consisting of the detector is moved to the vicinity of the center of the top board, and the height position of the top board is adjusted.

  Patent Document 1 discloses a mode in which priority is given to the height of the top panel and a mode in which the amount of movement of the imaging system is prioritized when the imaging system or the top panel and the ceiling or floor surface are prevented from interfering with each other. A switchable X-ray fluoroscopic apparatus is disclosed. Patent Document 2 discloses a radiation imaging apparatus that moves the top plate and the imaging system so that the height position of the intersection of the straight line connecting the X-ray tube and the X-ray detector and the top plate is kept constant. Yes.

JP 2004-33420 A International Publication No. 2014/041725

  When adopting a configuration that moves the imaging system near the center of the top plate when rotating the top plate, X-ray fluoroscopy and X-ray imaging cannot be performed near the longitudinal end of the top plate, The efficiency of X-ray inspection is reduced. That is, when X-ray imaging or X-ray fluoroscopy is performed by rotating the top board, the vicinity of the end of the top board cannot be used substantially.

  On the other hand, in the inventions described in Patent Document 1 and Patent Document 2, interference between the photographing system or the top plate and the ceiling or floor surface can be effectively prevented, but the moving range of the photographing system is set wide. Since the top plate rotation range is restricted above, there are more restrictions on the area in which the top plate can rotate, and some inspections that perform X-ray imaging or fluoroscopy by rotating the top plate at a large angle It may be difficult to suitably execute.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an X-ray fluoroscopic apparatus capable of increasing the rotation angle range of the top board.

  The invention described in claim 1 includes a top plate on which the subject is placed, an X-ray tube, and an X-ray detector that detects X-rays irradiated from the X-ray tube and passed through the subject. An imaging system, a rotating mechanism that rotates the top plate together with the imaging system around an axis that is orthogonal to the longitudinal direction of the top plate and that faces the horizontal direction; and the top plate, the imaging system. And an elevating mechanism that moves up and down, an imaging system moving mechanism that moves the imaging system in the longitudinal direction of the top plate, and the imaging system or the top plate and the ceiling or floor surface interfere with the top plate. In the X-ray fluoroscopic apparatus having a rotation range determination unit that determines a rotation range of the top plate by the rotation mechanism, the moving range of the imaging system by the imaging system moving mechanism is set as an imaging reference. A movement amount limiter that limits the area within the limit area centered on the position Comprising the al, the rotation range determination unit, on the basis of the travel limit unit limiting restriction area by, and determines a rotation range of the top plate by the rotating mechanism.

  According to a second aspect of the present invention, in the first aspect of the present invention, the photographing reference position is designated by an operator.

  According to a third aspect of the present invention, in the first aspect of the present invention, the imaging reference position is determined based on the selected imaging region.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the photographing reference position is determined based on an anatomical program.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the size of the restriction region is determined corresponding to the imaging region.

  According to the first to fourth aspects of the present invention, since the rotation range of the top plate is determined on the assumption that the imaging system moves within the limited area centered on the imaging reference position, the rotation of the top plate The angle range can be made larger. For this reason, it becomes possible to improve the freedom degree of X-ray fluoroscopy and X-ray imaging.

  According to the fifth aspect of the present invention, it is possible to set an appropriate rotation angle range of the top plate according to the imaging region by changing the size of the restriction region according to the imaging region.

1 is a perspective view of an X-ray fluoroscopic apparatus according to the present invention. It is a block diagram which shows the main control systems of the X-ray fluoroscopic apparatus which concerns on this invention. 3 is a perspective view of an input unit 20. FIG. It is explanatory drawing which shows the movement state of the top plate 14, the X-ray tube 11, the collimator 12, and the X-ray detector 13 in a restriction | limiting mode. It is explanatory drawing which shows the movement state of the top plate 14, the X-ray tube 11, the collimator 12, and the X-ray detector 13 in a restriction | limiting mode. It is explanatory drawing which shows the movement state of the top plate 14, the X-ray tube 11, the collimator 12, and the X-ray detector 13 in a restriction | limiting mode.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an X-ray fluoroscopic apparatus according to the present invention. FIG. 2 is a block diagram showing a main control system of the X-ray fluoroscopic apparatus according to the present invention.

  This X-ray fluoroscopic imaging apparatus includes a main support column 15 erected on a base 19, a holding unit 16 disposed so as to be movable up and down with respect to the main support column 15, and a rotation unit connected to the holding unit 16. The top plate 14, the arm 18 that is supported so as to be movable up and down with respect to the support column 17 and hangs down the X-ray tube 11 and the collimator 12, and is disposed at a position facing the X-ray tube 11 below the surface of the top plate 14. And an X-ray detector 13 such as a flat panel detector. The X-ray tube 11, the collimator 12, and the X-ray detector 13 function as an imaging system according to the present invention for performing X-ray fluoroscopy and X-ray imaging.

  The holding unit 16 moves up and down in the Z direction shown in FIG. 1 by driving the lifting mechanism 51 shown in FIG. Further, the top plate 14 is rotated around an axis that is orthogonal to the longitudinal direction of the top plate 14 and that faces the horizontal direction (axis that faces the Y direction shown in FIG. 1) by driving the rotation mechanism 52 shown in FIG. 2. To do. Further, the support column 17 and the X-ray detector 13 reciprocate in synchronization with each other in the longitudinal direction of the top plate 14 by driving the imaging system moving mechanism 53 shown in FIG. Further, the arm 18 moves up and down in the Z direction shown in FIG. 1 with respect to the support column 17 together with the X-ray tube 11 and the collimator 12 by driving the X-ray tube lifting mechanism 54 shown in FIG. The X-ray tube 11 and the collimator 12 can swing around the arm 18.

  When the top plate 14 is rotated by driving the rotation mechanism 52, the top plate 14 rotates with the X-ray tube 11, the collimator 12 and the X-ray detector 13 in a positional relationship with each other. When the holding unit 16 is moved up and down by driving the lifting mechanism 51, the top plate 14, the X-ray tube 11, the collimator 12 and the X-ray detector 13 are moved up and down while maintaining the positional relationship with each other.

  As shown in FIG. 2, this X-ray fluoroscopic apparatus has a ROM that stores an operation program necessary for controlling the apparatus, a RAM that temporarily stores data during control, and a CPU that executes logical operations. And a control unit 30 for controlling the entire apparatus. The control unit 30 includes a movement amount restriction unit 31 that restricts the moving distance of the photographing system by the photographing system moving mechanism 53 within a restriction region centered on the photographing reference position, the photographing system or the top plate 14, and the ceiling or floor surface. Is provided with a rotation range determination unit 32 that determines the rotation range of the top plate 14 by the rotation mechanism 52 based on the restriction region restricted by the movement amount restriction unit 31.

  Further, the control unit 30 includes subject information including the name and age of the subject, and an anatomical program (anatomical imaging conditions / APR) indicating various X-ray imaging conditions for the subject. It is connected to a hospital network 39 that stores data. The control unit 30 is connected to an input unit 20 that performs various inputs.

  FIG. 3 is a perspective view of the input unit 20.

  The input unit 20 includes a rotation operation lever 21 for rotating the top panel 14 in synchronization with the X-ray tube 11, the collimator 12, and the X-ray detector 13, and a mode switching button 22 for executing mode switching described later. An up button 23 and a down button 24 for raising and lowering the top plate 14 in synchronization with the X-ray tube 11, the collimator 12 and the X-ray detector 13, and the X-ray tube 11, the collimator 12 and the X-ray detector. And an imaging system operating lever 25 for moving the imaging system of 13 in the longitudinal direction of the top plate 14. The input unit 20 includes a touch panel type input area 26. In the input area 26, it is possible to input various other information. The input unit 20 includes buttons and the like having other functions, but these are omitted in FIG.

  When performing X-ray fluoroscopy and X-ray imaging in the X-ray imaging apparatus having the above-described configuration, the control unit 30 captures the subject's data and anatomical program from the in-hospital network 39. Then, the subject is placed on the top plate 14, and the top plate 14 is moved up and down together with the X-ray tube 11, the collimator 12, and the X-ray detector 13 by the lifting mechanism 51, and the top plate 14 is moved by the rotating mechanism 52. It is rotated together with the tube 11, the collimator 12 and the X-ray detector 13. Further, the imaging system is moved in the longitudinal direction of the top plate 14 by the imaging system moving mechanism 53, and the arm 18 is moved up and down relative to the top plate 14 together with the X-ray tube 11 and the collimator 12 by the X-ray tube lifting mechanism 54. Let Thereby, the relative positional relationship between the subject and the imaging system and the inclination of the body of the subject can be made suitable for X-ray imaging or X-ray fluoroscopy. At this time, the control unit 30 confirms the amount of elevation and rotation of the top plate 14, the amount of movement of the imaging system, and the amount of elevation of the X-ray tube 11.

  If the relative positional relationship between the subject and the imaging system and the posture of the subject are suitable for X-ray imaging or fluoroscopy, the operator switches the mode switching button 22 in the input unit 20 as necessary. By pressing, the operation mode of the fluoroscopic imaging apparatus is switched from the normal mode to the restriction mode in which the moving amount of the imaging system is limited.

  4 to 6 are explanatory views showing the movement states of the top plate 14, the X-ray tube 11, the collimator 12, and the X-ray detector 13 in the restriction mode.

  When the mode switch button 22 in the input unit 20 is pressed by the operator, the movement amount restriction unit 31 in the control unit 30 sets the movement range of the photographing system by the photographing system moving mechanism 53 as a restriction region E centering on the photographing reference position. Restrict to within. This imaging reference position is the center position of the X-ray tube 11 and the X-ray detector 13 when the mode switching button 22 is pressed as shown by a one-dot chain line in FIG. An area within a predetermined distance from the photographing reference position is a restricted area E.

  The size of the restriction region E is set according to the imaging region of the subject acquired from the anatomical program. For example, in the case of contrast imaging of the ureter in the urology department, the size of the restriction region E may be small. On the other hand, when the region extends from the neck to the waist as in contrast imaging of the spine, it is necessary to increase the size of the restriction region E. Therefore, the movement amount restriction unit 31 determines the size of the restriction region E with reference to the imaging region information acquired from the anatomical program.

  When the restriction area E is determined, the rotation range determination unit 32 in the control unit 30 determines the rotation range of the top plate 14 by the rotation mechanism 52 based on the restriction area E restricted by the movement amount restriction unit 31. When determining the rotation range, the height of the ceiling 101 of the examination room shown in FIGS. Then, the rotation range determination unit 32 considers the position of the imaging system relative to the top plate 14 and the distance between the arm 18 and the top plate 14 in addition to the height H of the top plate 14 from the floor surface 102. The range of rotation is determined based on scientific calculations.

  For example, when performing fluoroscopy, the operator operates the rotation operation lever 21 in the input unit 20 to rotate the top 14 in order to appropriately flow down the contrast medium. Accordingly, as shown in FIG. 5, when the top plate 14 is tilted counterclockwise around the axis P that faces the horizontal direction, or as shown in FIG. 6, the axis P that the top plate 14 faces the horizontal direction. Even when tilted in the clockwise direction with respect to the center, the amount of movement of the imaging system is limited based on the limited region E, so that the X-ray tube 11 and the top plate 14 interfere with the ceiling 101 or the top plate It is possible to prevent 14 from interfering with the floor surface 102. Then, since the rotation range determination unit 32 determines the rotation range of the top plate 14 on the assumption that the imaging system moves within the limited region E centered on the imaging reference position, the rotation angle range of the top plate 14 is determined. Can be larger. For this reason, it becomes possible to improve the freedom degree of X-ray fluoroscopy and X-ray imaging.

  That is, unlike the prior art, it is not necessary to limit the rotation angle of the top plate 14 on the assumption that the photographing system moves in a wide range along the top plate 14. The top plate 14 can be rotated over a wide range. In particular, when the imaging system is arranged at both ends in the longitudinal direction of the top plate 14 to perform X-ray imaging or X-ray fluoroscopy, The rotation range can be increased.

  In addition, since the moving range of the photographing system is limited to the restricted region E, for example, when the photographing system is moved by remote control, the operation direction is misidentified, and the photographing system greatly deviates from the region of interest. There is also a secondary effect that it is possible to alleviate the problem that it takes time to restore.

  In the embodiment described above, the position of the imaging system when the mode switching button 22 is pressed, that is, the center position of the X-ray tube 11 and the X-ray detector 13 at that time is set as the imaging reference position. Yes. As another embodiment, when an imaging part of a subject is selected, a position that roughly corresponds to the selected part may be determined as an imaging reference position. At this time, the operator may select an imaging region using the input area 26 or the like in the input unit 20.

  As another embodiment, the reference position may be determined from the in-hospital network 39 based on an anatomical program. In this case, an imaging reference position that serves as an imaging reference may be set by an anatomical program.

  In the above-described embodiment, the so-called over-tube type X-ray fluoroscopic apparatus in which the X-ray tube 11 is disposed above the top plate 14 has been described. However, the X-ray detector 13 is disposed above the top plate 14. Even in an under tube type X-ray fluoroscopic apparatus in which the X-ray tube 11 is arranged below the top plate 14, interference between the X-ray detector 13 and the ceiling 101 can be effectively prevented. ,

DESCRIPTION OF SYMBOLS 11 X-ray tube 12 Collimator 13 X-ray detector 14 Top plate 15 Main support | pillar 16 Holding | maintenance part 17 Support | pillar 18 Arm 19 Base 20 Input part 21 Rotation operation lever 22 Mode switch button 23 Up button 24 Down button 25 Imaging system operation lever 26 Input area 30 Control unit 31 Movement amount limiting unit 32 Rotation range determination unit 51 Elevating mechanism 52 Rotating mechanism 53 Imaging system moving mechanism 54 X-ray tube elevating mechanism 101 Ceiling 102 Floor surface

Claims (5)

A top plate on which the subject is placed;
An imaging system comprising: an X-ray tube; and an X-ray detector that detects X-rays irradiated from the X-ray tube and passing through the subject;
A rotating mechanism that rotates the top plate around the axis that is orthogonal to the longitudinal direction of the top plate and in the horizontal direction together with the imaging system;
An elevating mechanism for elevating the top plate together with the imaging system;
An imaging system moving mechanism for moving the imaging system in the longitudinal direction of the top plate with respect to the top plate;
In order to prevent the imaging system or the top plate and the ceiling or floor surface from interfering with each other, a rotation range determination unit that determines a rotation range of the top plate by the rotation mechanism;
X-ray fluoroscopic apparatus comprising:
A movement amount restriction unit for restricting a movement range of the photographing system by the photographing system moving mechanism within a restriction region centered on a photographing reference position;
The X-ray fluoroscopic imaging apparatus, wherein the rotation range determination unit determines a rotation range of the top plate by the rotation mechanism based on a limited region limited by the movement amount limiting unit. The X-ray fluoroscopic apparatus according to claim 1,
The imaging reference position is an X-ray fluoroscopic apparatus specified by an operator. The X-ray fluoroscopic apparatus according to claim 1,
The X-ray fluoroscopic imaging apparatus, wherein the imaging reference position is determined based on a selected imaging region. The X-ray fluoroscopic apparatus according to claim 1,
The X-ray fluoroscopic apparatus in which the imaging reference position is determined based on an anatomical program. The X-ray fluoroscopic apparatus according to any one of claims 1 to 4,
An X-ray fluoroscopic imaging apparatus in which a size of the restricted area is determined corresponding to an imaging region.

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