JP2016106915A - Fluoroscopic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluoroscopic apparatus, in a case of moving a top plate and a case of moving irradiation direction of radiation, capable of moving irradiation fields in a similar sense by operating a same operation part.SOLUTION: A moving control section 52 controls moving operation of a top plate and a moving operation of a shielding leaf and a shielding leaf for one-side aperture stop such that a relationship between a tilt angle as a control input of an operation lever for irradiation field movement, and a travel of an X-ray image to be displayed on a display part 55 due to movement of the top plate, is equivalent to a relationship between the tilt angle of the operation lever for the irradiation field movement and a travel of the X-ray image to be displayed on the display part 55 due to movement of the shielding leaf and the shielding leaf for the one-side aperture stop.SELECTED DRAWING: Figure 5

Description

  The present invention provides an imaging system including a radiation irradiation unit and a radiation detection unit, a display unit for displaying a radiographic image captured by the imaging system, and a top plate on which the subject is placed. The present invention relates to a radiographic imaging device including a top plate moving mechanism that reciprocates in a direction crossing an axis.

  As such a radiographic imaging apparatus, an X-ray fluoroscopic imaging apparatus called an X-ray fluoroscopic imaging table is used. This X-ray fluoroscopic apparatus is for performing X-ray imaging and X-ray fluoroscopy. Such an X-ray fluoroscopic apparatus has a configuration in which the top plate on which the subject is placed is moved in a direction perpendicular to the body axis of the subject in order to move the X-ray irradiation field. This movement of the top plate is also used for the purpose of attaching barium to the stomach inner surface by, for example, shaking the barium inside the stomach at the time of photographing the upper digestive tract.

  On the other hand, when performing IVR (interventional radiology / therapeutic application of radiological diagnosis technology), when using a bronchoscope or an endoscope, the X-ray irradiation field without moving the subject for safety. Is required to move. In such a case, it is not impossible to move the imaging system composed of the X-ray irradiation unit and the X-ray detection unit in a direction orthogonal to the body axis of the subject, but the mechanism becomes complicated. In addition to this, there arises a problem that the apparatus becomes large.

  In Patent Document 1, the X-ray irradiation direction is moved by rotating the X-ray tube together with the collimator, and thereby the X-ray irradiation field is moved in a direction orthogonal to the body axis direction of the subject. An X-ray fluoroscopic table is disclosed.

  On the other hand, in Patent Document 2, a pair of one-side aperture shielding leaves and a pair of one-side aperture shielding leaves, which are supported by a guide member so as to be movable in one direction and have a long hole parallel to the movement direction, are provided. A moving member provided with a pair of engaging portions that can move in the long holes in a state of being engaged with the formed long holes, driving means for reciprocating the moving members in parallel with the long holes, and a pair And a biasing member that biases the one-side aperture shielding leaf in a direction away from each other, and the distance between the pair of engaging portions attached to the moving member is arranged at a position where the pair of one-side aperture shielding leaves are most separated from each other. By using only one driving means such as a motor, the distance between the long holes formed in the pair of one-side aperture shielding leaves is set to a distance corresponding to the distance between the long holes formed in the pair of one-side aperture shielding leaves. Reciprocate independently of each other A collimator mechanism of an X-ray imaging apparatus capable of biasing the X-ray irradiation region with respect to the X-ray axis by narrowing only one side of the rectangular X-ray irradiation field. It is disclosed.

JP 2001-104299 A JP 2014-083143 A

  As described above, in the case of moving the X-ray irradiation field in order to change the imaging location for the subject, as described above, the method of moving the subject together with the top plate is described in Patent Document 1. As described above, there is a method of moving the X-ray irradiation direction. Which of these is selected also differs depending on the X-ray imaging format such as the surgical technique and the IVR. For this reason, conventionally, the X-ray irradiation field has been moved by adopting any one of these methods. However, in any case, it is preferable that the X-ray irradiation field can be moved without the operator being aware of it.

  The present invention has been made to solve the above-described problems. Irradiation is performed with the same feeling by operating the same operation unit when the top plate is moved and when the irradiation direction of radiation is moved. An object of the present invention is to provide a radiographic imaging apparatus capable of moving a field.

  The invention according to claim 1 is an imaging system including a radiation irradiation unit and a radiation detection unit, a display unit that displays a radiographic image captured by the imaging system, and a top board on which the subject is placed. A top plate moving mechanism for moving the top plate in a direction crossing the body axis of the subject, and a direction of radiation applied from the radiation irradiation unit in a direction parallel to the moving direction of the top plate When the irradiation direction moving mechanism, the irradiation field moving operation unit, and the irradiation field moving operation unit are operated, the top plate is moved by the top plate moving mechanism to the body axis of the subject. The top plate moving operation for moving in the direction intersecting with the irradiation direction and the irradiation direction moving operation for moving the irradiation direction of the radiation in a direction parallel to the moving direction of the top plate by the irradiation direction moving mechanism are selectively executed. Means.

  According to a second aspect of the present invention, in the first aspect of the present invention, the operation unit for moving the irradiation field is operated to move the top plate in a direction intersecting the body axis of the subject. , When the operation unit for moving the irradiation field is operated to move the irradiation direction of the radiation in a direction parallel to the moving direction of the top plate, and the operation amount of the operation unit for moving the irradiation field and the display A movement control unit for controlling the top plate movement operation by the top plate movement mechanism and the irradiation direction movement operation by the irradiation direction movement mechanism so that the relationship with the movement amount of the radiographic image displayed on the unit is the same. Prepare.

  According to the first aspect of the present invention, when the top plate is moved and when the irradiation direction of the radiation is moved, the irradiation field is moved with the same feeling by operating the same irradiation field moving operation unit. Can be moved.

  According to the second aspect of the present invention, the amount of operation of the operation unit for moving the irradiation field and the radiation image displayed on the display unit when the top plate is moved and when the irradiation direction of the radiation is moved. It is possible to make the relationship with the movement amount equivalent.

1 is a schematic front view of an X-ray fluoroscopic apparatus according to the present invention. 1 is a schematic side view of an X-ray fluoroscopic apparatus according to the present invention. It is a perspective view which shows typically the shielding leaf 40 in the collimator 13. FIG. 3 is a perspective view of an operation panel 31. FIG. It is a block diagram which shows the main control systems in a X-ray fluoroscopic apparatus. It is a perspective view which shows the modification of the operation lever 35 for irradiation field movement. It is a side surface schematic diagram of the X-ray fluoroscopic apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the main control systems in the X-ray fluoroscopic apparatus which concerns on 2nd Embodiment of this invention. It is a side surface schematic diagram of the X-ray fluoroscopic apparatus which concerns on 3rd Embodiment of this invention. It is a block diagram which shows the main control systems in the X-ray fluoroscopic apparatus which concerns on 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of an X-ray fluoroscopic apparatus according to the present invention. FIG. 2 is a schematic side view of the X-ray fluoroscopic apparatus according to the present invention.

  This X-ray fluoroscopic imaging apparatus is also called an X-ray fluoroscopic imaging table and includes a top plate 11 on which a subject M is placed on a main body 15. The top plate 11 is movable in a direction perpendicular to the body axis of the subject M (a direction perpendicular to the paper surface in FIG. 1 and the left-right direction in FIG. 2). A rack 18 is disposed on the lower surface of the top plate 11. On the other hand, a motor 21 is disposed in the main body 15. A pinion 19 that meshes with the rack 18 is disposed on the rotation shaft of the motor 21. Therefore, the top plate 11 can be reciprocated in a direction perpendicular to the body axis of the subject M by driving the motor 21.

  In addition, the X-ray fluoroscopic imaging apparatus regulates the X-ray tube 12 that irradiates the subject M on the top plate 11 with X-rays and the irradiation field of the X-rays irradiated from the X-ray tube 12. The collimator 13 is provided. The X-ray tube 12 and the collimator 13 constitute a radiation irradiation unit according to the present invention. The X-ray tube 12 and the collimator 13 are supported by a column 16 connected to the main body 15. The support column 16 can be moved together with the X-ray tube 12 and the collimator 13 in the body axis direction of the subject M (the horizontal direction in FIG. 1 and the direction perpendicular to the paper surface in FIG. 2) by a moving mechanism (not shown). It has become.

  Furthermore, this X-ray fluoroscopic apparatus is an X-ray detector 14 such as an image intensifier (II) or a flat panel detector that detects X-rays irradiated from the X-ray tube 12 and passing through the subject M. Is provided. The X-ray detector 14 constitutes a radiation detection unit according to the present invention. The X-ray detector 14 can reciprocate in the body axis direction of the subject M together with the X-ray tube 12 and the collimator 13 by a moving mechanism (not shown).

  The main body 15 is disposed so as to be rotatable with respect to the leg portion 17. Therefore, as shown in FIG. 1 and FIG. 2, the top plate 11 has a lying position in which the surface thereof is parallel to the floor surface 20 and faces the horizontal direction, and the surface of the top plate 11 is perpendicular to the floor surface 20. It is also possible to take a standing posture in the vertical direction.

  The collimator 13 described above has two pairs (four) for forming a rectangular X-ray irradiation field centered on the optical axis of the X-ray tube 12 (the center in the irradiation direction of the X-rays from the X-ray tube 12). And a pair of one-side aperture shielding leaves 41 for shielding the edge of the X-ray irradiation field in the direction orthogonal to the body axis of the subject M.

  FIG. 3 is a perspective view schematically showing the shielding leaf 40 in the collimator 13 described above.

  The collimator 43 described above includes four shielding leaves 40. A part of the X-rays irradiated from the X-ray tube 12 is blocked by the four shielding leaves 40, thereby forming a rectangular X-ray irradiation field R. Of these shielding leaves 40, the pair of shielding leaves 40 facing in the direction orthogonal to the body axis of the subject M is driven along the body axis direction of the subject M by driving a motor 61 described later. Move horizontally in synchronization with each other in opposite directions. Further, among these shielding leaves 40, the pair of shielding leaves 40 facing the body axis direction of the subject M is driven along a direction perpendicular to the body axis of the subject M by driving a motor 62 described later. Move horizontally in synchronization with each other in opposite directions. The opening degree of each shielding leaf 40 is detected by an opening degree detector such as a potentiometer (not shown).

  On the other hand, the pair of one-side aperture shielding leaves 41 shown in FIG. 2 is in a direction perpendicular to the body axis of the subject M with respect to the rectangular X-ray irradiation field R formed by the two pairs of shielding leaves 40. In order to shield the edge side, they move in the horizontal direction independently of each other. As the moving mechanism of the one-side aperture shielding leaf 41, the configuration described in Patent Document 2 described above is employed. Therefore, it is possible to reciprocate the pair of one-side aperture shielding leaves 41 independently of each other using only one motor 63 described later.

  FIG. 4 is a perspective view of the operation panel 31 in the X-ray fluoroscopic apparatus described above.

  The operation panel 31 includes a moving lever 32 for the pair of shielding leaves 40 that moves along the body axis direction of the subject M, and a pair of shielding that moves along the direction orthogonal to the body axis of the subject M. A lever 33 for moving the leaf 40, a lever 34 for moving the shielding leaf 41 for one-side aperture, an operation lever 35 for moving the irradiation field, and a still image photographing lever provided on the operation lever 35 for moving the irradiation field. Switch 36, a top plate moving operation for moving the top plate 11 in a direction crossing the body axis of the subject M, and operating the collimator 13 to change the irradiation direction of the X-rays from the X-ray tube 12. 11 is provided with a switching button 37 for selectively executing an irradiation direction moving operation for moving in a direction parallel to the moving direction. The irradiation field moving operation lever 35 can be tilted in four directions corresponding to the direction in which the X-ray irradiation field is moved. In addition, each time the switch button 37 is pressed, it is possible to switch and select the top plate moving operation and the irradiation direction moving operation. The operation panel 31 is installed in one or both of an imaging room for performing X-ray imaging and an operation room for performing X-ray imaging operations.

  FIG. 5 is a block diagram showing a main control system in the X-ray fluoroscopic apparatus described above.

  This X-ray fluoroscopic apparatus has a CPU that executes logical operations, a ROM that stores operation programs necessary for controlling the apparatus, a RAM that temporarily stores data during control, and the like, and controls the entire apparatus. A control unit 50 is provided. The control unit 50 is connected to the above-described operation panel 31, the moving levers 32 and 33 for the shielding leaf 40 disposed on the operation panel 31, the moving lever 34 for the one-side aperture shielding leaf 41, and irradiation. Operation signals from the field moving operation lever 35, the still image photographing switch 36, and the switching button 37 are received.

  Moreover, this control part 50 is connected with the motor 21 for moving the top plate 11 mentioned above. The control unit 50 is connected to motors 61 and 62 for moving the shielding leaf 40 in the collimator 13 and a motor 63 for moving the one-side aperture shielding leaf 41. The control unit 50 is connected to the X-ray detector 14 described above. The control unit 50 is connected to the X-ray tube 12 described above via a high voltage device 54. Further, the control unit 50 is connected to a display unit 55 including a liquid crystal display panel for displaying an X-ray image detected by the X-ray detector 14.

  Further, as will be described later, the control unit 50 receives a signal from the switching button 37 and moves the top 11 in a direction intersecting the body axis of the subject M, and operates the collimator 13. Thus, a moving operation switching unit 51 for selectively executing an irradiation direction moving operation for moving the irradiation direction of the X-rays from the X-ray tube 12 in a direction parallel to the moving direction of the top plate 11 is provided. Further, the control unit 50 operates when the operation lever 35 for moving the irradiation field is operated to move the top 11 in a direction perpendicular to the body axis of the subject M, and when the operation lever 35 for moving the irradiation field is moved. The operation amount of the operation lever 35 for moving the irradiation field and the movement of the X-ray image displayed on the display unit 55 when the X-ray irradiation direction is moved in a direction parallel to the moving direction of the top plate 11 when operated. A movement control unit 52 that controls the movement operation of the top plate 11 by driving the motor 21 and the movement operation of the X-ray irradiation direction by the collimator 13 is provided so that the relationship with the amount is equal.

  When performing X-ray fluoroscopy in the X-ray fluoroscopic imaging apparatus having the above-described configuration, it may be necessary to move the X-ray irradiation field in order to change the imaging position with respect to the subject M. In such a case, when the imaging position is changed in the body axis direction of the subject M, the imaging system including the X-ray tube 12, the collimator 13, and the X-ray detector 14 is used as the body axis of the subject M. By moving in the direction, the position of the X-ray irradiation field is moved in the body axis direction of the subject M. On the other hand, when changing the imaging position in a direction orthogonal to the body axis of the subject M, the top plate moving operation for moving the top plate 11 in the direction intersecting the body axis of the subject M, and the collimator 13 By performing the operation, one of the irradiation direction moving operations for moving the X-ray irradiation direction from the X-ray tube 12 in a direction parallel to the movement direction of the top plate 11 is executed.

  For example, when the X-ray irradiation field is moved in a direction perpendicular to the body axis of the subject M in order to change the imaging position during upper gastrointestinal tract imaging, the subject M is moved vertically in the upper gastrointestinal tract imaging. Since it is necessary to shoot from the top, a top plate moving operation for moving the top plate 11 in a direction orthogonal to the body axis of the subject M is executed. Hereinafter, the top plate moving operation will be described.

  In the first stage, the imaging range in the direction perpendicular to the body axis of the subject M with respect to the subject M is determined by the pair of shielding leaves 40 facing the body axis direction of the subject M. It is regulated to have a predetermined width on the surface. In this state, when the top plate 11 is moved in order to move the imaging position in a direction perpendicular to the body axis of the subject M, the operator first presses the switching button 37 on the operation panel 31. Select the top plate movement operation. This signal is transmitted to the movement operation switching unit 51 in the control unit 50.

  Then, the operator tilts the operation lever 35 for moving the irradiation field in a direction in which the X-ray irradiation field is desired to be moved. As described above, the irradiation field moving operation lever 35 can be tilted in four directions, so that the X-ray irradiation field can be moved in four directions. When the operation lever 35 for moving the irradiation field is tilted in the direction in which the X-ray irradiation field is desired to be moved out of the directions orthogonal to the body axis of the subject M, the shielding leaf 40 is stopped. By driving the motor 21, the top plate 11 moves in a direction corresponding to the tilting direction of the operation lever 35 for moving the irradiation field. As the table 11 moves, the X-ray irradiation field moves, and the imaging position is changed with respect to the direction perpendicular to the body axis of the subject M. At this time, the relationship between the tilt angle of the operation lever 35 for moving the irradiation field and the amount of movement of the top plate 11 is controlled by the movement control unit 52 in the control unit 50.

  On the other hand, when using a bronchoscope or an endoscope at the time of IVR, it is necessary to move the X-ray irradiation field without moving the subject M for safety. By doing so, an irradiation direction moving operation for moving the X-ray irradiation direction from the X-ray tube 12 in a direction parallel to the movement direction of the top plate 11 is executed. Hereinafter, the irradiation direction moving operation will be described.

  Even in this case, in the first stage, the imaging range in the direction perpendicular to the body axis of the subject M with respect to the subject M is X by the pair of shielding leaves 40 facing the body axis direction of the subject M. The surface of the line detector 14 is restricted to have a predetermined width. In this state, when moving the X-ray irradiation direction in order to move the X-ray irradiation field in a direction perpendicular to the body axis of the subject M, the operator first presses the switch button 37 on the operation panel 31. By pressing, an irradiation direction moving operation is selected. This signal is transmitted to the movement operation switching unit 51 in the control unit 50.

  Then, the operator tilts the operation lever 35 for moving the irradiation field in a direction in which the X-ray irradiation field is desired to be moved. When the operation lever 35 for moving the irradiation field is tilted in a direction orthogonal to the body axis of the subject M in a direction in which the X-ray irradiation field is desired to be moved, the top plate 11 is in a stopped state. By driving the motor 62, the pair of shielding leaves 40 facing the body axis direction of the subject M move in a direction orthogonal to the body axis of the subject M. In this case, the pair of shielding leaves 40 are moved in opposite directions in synchronization with each other by the drive of a single motor 62. For this reason, only the movement of the shielding leaf 40 only changes the size of the X-ray irradiation field, and it is necessary to change the position of the X-ray irradiation field in the direction perpendicular to the body axis of the subject M. Don't be. For this reason, when this irradiation direction is moved, the one-side aperture shielding leaf 41 is moved by driving the motor 63. Due to the movement of the shielding leaf 40 and the movement of the one-side aperture shielding leaf 41, the X-ray irradiation field remains in a state where the width A is maintained on the surface of the X-ray detector 14 as shown in FIG. It moves in the direction perpendicular to the body axis of the person M. Thereby, the imaging position is changed with respect to the direction orthogonal to the body axis of the subject M. The relationship between the tilt angle of the operation lever 35 for moving the irradiation field and the movement amounts of the shielding leaf 40 and the one-side aperture shielding leaf 41 at this time is controlled by the movement control unit 52 in the control unit 50.

  At this time, the movement control unit 52 irradiates the relationship between the tilt angle, which is the operation amount of the operation lever 35 for moving the irradiation field, and the movement amount of the X-ray image displayed on the display unit 55 due to the movement of the top plate 11. The top plate is set so that the relationship between the tilting angle of the field movement operating lever 35 and the amount of movement of the shielding leaf 40 and the one-side aperture shielding leaf 41 of the X-ray image displayed on the display unit 55 is the same. 11 and the movement operation of the shielding leaf 40 and the one-side aperture shielding leaf 41 are controlled. For this reason, in the case where the top plate 11 is moved and the case where the X-ray irradiation direction is moved, the operation amount of the irradiation field moving operation lever 35 which is the irradiation field moving operation unit and the display unit 55 are displayed. It is possible to make the relationship with the movement amount of the radiation image equivalent.

  As described above, according to this X-ray fluoroscopic apparatus, after the switching button 37 is pressed to select either the top plate moving operation or the irradiation direction moving operation, the operation lever 35 for moving the irradiation field is operated. Thus, the movement of the X-ray irradiation field can be executed with the same feeling when the top plate 11 is moved and when the irradiation direction is moved. The relationship between the amount of operation of the operation lever 35 for moving the irradiation field and the amount of movement of the X-ray image displayed on the display unit 55 when the top plate 11 is moved and when the X-ray irradiation direction is moved. Can be made equivalent.

  FIG. 6 is a perspective view showing a modification of the operation lever 35 for moving the irradiation field.

  In the embodiment described above, the switching button 37 for selectively executing the top plate moving operation and the irradiation direction moving operation is disposed on the surface of the operation panel 31. On the other hand, this embodiment has a configuration in which a switching button 38 having the same function as the switching button 37 is attached to the operation lever 35. When such a configuration is adopted, it is possible to easily execute the switching operation between the top plate moving operation and the irradiation direction moving operation and the moving operation of the photographing range with one hand.

  Next, another embodiment of the present invention will be described. FIG. 7 is a schematic side view of an X-ray fluoroscopic apparatus according to the second embodiment of the present invention. FIG. 8 is a block diagram showing a main control system in the X-ray fluoroscopic apparatus according to the second embodiment of the present invention. In addition, about the member similar to the X-ray fluoroscope which concerns on embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the embodiment described above, when performing the irradiation direction moving operation, the X-ray irradiation direction is moved by moving the shielding leaf 40 and the one-side aperture shielding leaf 41 in the collimator 13. In contrast, the X-ray fluoroscopic apparatus according to the second embodiment employs a configuration in which only the shielding leaf 40 in the collimator 13 is used to move the X-ray irradiation direction.

  That is, in the above-described embodiment, the pair of shielding leaves 40 facing in the direction orthogonal to the body axis of the subject M are synchronized with each other in the opposite directions along the body axis direction of the subject M by driving the motor 61. The pair of shielding leaves 40 facing the body axis of the subject M are horizontally moved in synchronization with the opposite directions along the direction orthogonal to the body axis of the subject M by driving the motor 62. The structure to let you adopt is adopted. On the other hand, in this embodiment, the pair of shielding leaves 40 facing in the direction orthogonal to the body axis of the subject M are driven in opposite directions along the body axis direction of the subject M by driving the motor 61. The pair of shielding leaves 40 that are horizontally moved synchronously and face the body axis direction of the subject M are independent of each other along the direction orthogonal to the body axis of the subject M by driving the motors 64 and 65. And adopting a configuration for horizontal movement.

  In the X-ray fluoroscopic apparatus according to this embodiment, when the irradiation direction moving operation is selected, the pair of shielding leaves 40 facing the body axis direction of the subject M are orthogonal to the body axis of the subject M. The X-ray irradiation field is configured to move horizontally along the direction to be moved independently of each other.

  Also in this embodiment, in the first stage, the imaging range in the direction perpendicular to the body axis of the subject M with respect to the subject M is determined by the pair of shielding leaves 40 facing the body axis direction of the subject M. The surface of the X-ray detector 14 is regulated to have a width A (see FIG. 7). In this state, when moving the X-ray irradiation direction in order to move the imaging position in a direction perpendicular to the body axis of the subject M, the operator first presses the switching button 37 on the operation panel 31. Thus, the movement operation in the irradiation direction is selected. This signal is transmitted to the movement operation switching unit 51 in the control unit 50.

  Then, the operator tilts the operation lever 35 for moving the irradiation field in a direction in which the X-ray irradiation field is desired to be moved. When the operation lever 35 for moving the irradiation field is tilted in a direction orthogonal to the body axis of the subject M in a direction in which the X-ray irradiation field is desired to be moved, the top plate 11 is in a stopped state. By driving the motors 64 and 65, the pair of shielding leaves 40 facing the body axis direction of the subject M move independently from each other in the direction perpendicular to the body axis of the subject M. At this time, as shown in FIG. 7, the X-ray irradiation field is moved in a direction orthogonal to the body axis of the subject M while maintaining the state of the width A on the surface of the X-ray detector 14. The imaging position is changed with respect to the direction perpendicular to the body axis of the subject M. The relationship between the tilt angle of the operation lever 35 for moving the irradiation field and the amount of movement of the shielding leaf 40 at this time is controlled by the movement control unit 52 in the control unit 50.

  Also in this embodiment, the movement control unit 52 has a relationship between the tilt angle that is the operation amount of the operation lever 35 for moving the irradiation field and the movement amount due to the movement of the top plate 11 of the X-ray image displayed on the display unit 55. And the movement of the top 11 so that the relationship between the tilt angle of the operation lever 35 for moving the irradiation field and the amount of movement by the movement of the shielding leaf 40 of the X-ray image displayed on the display unit 55 is equivalent. And the movement of the shielding leaf 40 are controlled. For this reason, in the case where the top plate 11 is moved and the case where the X-ray irradiation direction is moved, the operation amount of the irradiation field moving operation lever 35 which is the irradiation field moving operation unit and the display unit 55 are displayed. It is possible to make the relationship with the movement amount of the radiation image equivalent.

  Next, still another embodiment of the present invention will be described. FIG. 9 is a schematic side view of an X-ray fluoroscopic apparatus according to the third embodiment of the present invention. FIG. 10 is a block diagram showing a main control system in the X-ray fluoroscopic apparatus according to the third embodiment of the present invention. In addition, about the member similar to the X-ray fluoroscopic imaging apparatus which concerns on each embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the embodiment described above, when performing the irradiation direction moving operation, the X-ray irradiation direction is moved by moving the shielding leaf 40 or the one-side aperture shielding leaf 41 in the collimator 13. On the other hand, in the X-ray fluoroscopic apparatus according to the third embodiment, the X-ray irradiation direction is moved by swinging the X-ray tube 12 together with the collimator 13.

  That is, in the X-ray fluoroscopic apparatus according to this embodiment, when the irradiation direction moving operation is selected, the X-ray tube 12 is driven by the motor 66 together with the collimator 13 as shown in FIG. The imaging region is moved by swinging about an axis that faces the body axis of the examiner M.

  Also in this embodiment, in the first stage, the imaging range in the direction perpendicular to the body axis of the subject M with respect to the subject M is determined by the pair of shielding leaves 40 facing the body axis direction of the subject M. The surface of the X-ray detector 14 is regulated to have a width A (see FIG. 9). In this state, when moving the X-ray irradiation direction in order to move the imaging position in a direction perpendicular to the body axis of the subject M, the operator first presses the switching button 37 on the operation panel 31. Thus, the movement operation in the irradiation direction is selected. This signal is transmitted to the movement operation switching unit 51 in the control unit 50.

  Then, the operator tilts the operation lever 35 for moving the irradiation field in a direction in which the X-ray irradiation field is desired to be moved. When the operation lever 35 for moving the irradiation field is tilted in a direction orthogonal to the body axis of the subject M in a direction in which the X-ray irradiation field is desired to be moved, the top plate 11 is in a stopped state. By driving the motor 66, the X-ray tube 12 and the collimator 13 are swung around an axis that faces the body axis of the subject M. At this time, as shown in FIG. 9, the X-ray irradiation field is moved in a direction perpendicular to the body axis of the subject M while maintaining the state of the width A on the surface of the X-ray detector 14. The imaging position is changed with respect to the direction perpendicular to the body axis of the subject M. The relationship between the tilt angle of the operation lever 35 for moving the irradiation field and the movement amounts of the shielding leaf 40 and the one-side aperture shielding leaf 41 at this time is controlled by the movement control unit 52 in the control unit 50.

  Also in this embodiment, the movement control unit 52 has a relationship between the tilt angle that is the operation amount of the operation lever 35 for moving the irradiation field and the movement amount due to the movement of the top plate 11 of the X-ray image displayed on the display unit 55. And the relationship between the tilting angle of the operation lever 35 for moving the irradiation field and the amount of movement of the X-ray image displayed on the display unit 55 due to the swing of the X-ray tube 12 and the collimator 13 is the same. The swing operation of the tube 12 and the collimator 13 is controlled. For this reason, in the case where the top plate 11 is moved and the case where the X-ray irradiation direction is moved, the operation amount of the irradiation field moving operation lever 35 which is the irradiation field moving operation unit and the display unit 55 are displayed. It is possible to make the relationship with the movement amount of the radiation image equivalent.

  In the third embodiment, when the X-ray tube 12 and the collimator 13 are swung while the shielding leaves 40 in the collimator 13 are stopped, the crossing angle between the X-ray irradiation direction and the vertical direction. As X becomes larger, the X-ray irradiation field becomes larger than the width A on the surface of the X-ray detector 14. Therefore, according to the swing angle of the X-ray tube 12 and the collimator 13, the arrangement of the pair of shielding leaves 40 facing the body axis direction of the subject M in the direction perpendicular to the body axis of the subject M is You may employ | adopt the structure changed sequentially so that the width | variety A of an X-ray irradiation field may become fixed.

  In any of the above-described embodiments, the operator presses the switching button 37 on the operation panel 31 to select either the top plate moving operation or the irradiation direction moving operation, and this signal is sent to the control unit 50. A configuration is adopted in which the top plate moving operation and the irradiation direction moving operation are switched by being transmitted to the moving operation switching unit 51. However, for example, the table top movement operation and the irradiation direction movement operation are stored in association with the anatomical program, and the top plate movement operation and the irradiation direction movement operation are switched by selecting the anatomical program. May be. The switching means in the present invention is not limited to the above-described switch or the like, and any other configuration may be used as long as it can switch between the top plate moving operation and the irradiation direction moving operation by some method. It is also possible.

DESCRIPTION OF SYMBOLS 11 Top plate 12 X-ray tube 13 Collimator 14 X-ray detector 15 Main body 16 Support | pillar 18 Rack 19 Pinion 21 Motor 31 Operation panel 35 Operation lever 37 for irradiation field movement 37 Switching button 40 Shielding leaf 41 Shielding leaf 41 for one side diaphragm 50 Control part 51 Movement Operation Switching Unit 52 Movement Control Unit 55 Display Unit 61 Motor 62 Motor 63 Motor 64 Motor 65 Motor M Subject

Claims (2)

An imaging system including a radiation irradiation unit and a radiation detection unit;
A display unit for displaying a radiographic image captured by the imaging system;
A top plate on which the subject is placed;
A top plate moving mechanism for moving the top plate in a direction intersecting the body axis of the subject;
An irradiation direction moving mechanism for moving the irradiation direction of the radiation irradiated from the radiation irradiation unit in a direction parallel to the movement direction of the top plate;
An operation unit for moving the irradiation field;
A top plate moving operation for moving the top plate in a direction crossing the body axis of the subject by the top plate moving mechanism when the operation unit for moving the irradiation field is operated, and the irradiation direction moving mechanism Switching means for selectively executing an irradiation direction movement operation for moving the irradiation direction of the radiation in a direction parallel to the movement direction of the top plate,
A radiographic imaging apparatus comprising: The fluoroscopic apparatus according to claim 1,
When the operation unit for moving the irradiation field is operated to move the top plate in a direction intersecting the body axis of the subject, the operation unit for moving the irradiation field is operated and the irradiation direction of the radiation And the movement amount of the radiation image displayed on the display unit is equivalent to the movement amount of the radiation field moving operation unit. The radiographic imaging apparatus further includes a movement control unit that controls a top board moving operation by the top board moving mechanism and an irradiation direction moving operation by the irradiation direction moving mechanism.

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