JP4356488B2 - X-ray tube holding device - Google Patents

Description

  The present invention relates to an X-ray tube holding device for holding an X-ray tube suspended from a ceiling or the like, and in particular, a suspended X-ray tube is moved up and down by an operation switch and a handle provided on an operation panel. The present invention relates to the display of the rotation angle or imaging distance of the X-ray tube when rotating around the horizontal axis and setting the imaging position.

  The overhead traveling X-ray tube holding device has a rail on the ceiling, a telescopic column suspended from a cart suspended from it, and an X-ray tube attached to its lower end via a block. It can move back and forth, move up and down, and rotate (around the vertical axis) and rotate (around the horizontal axis) of the X-ray tube. In addition, a method using a stopper means is used at a specific position for setting the rotation (around the vertical axis) of the X-ray tube. By using this overhead traveling X-ray tube holding device, there is no structure on the floor, so the floor surface can be used effectively, and combined with a reader imaging table, a Bucky imaging table, an X-ray fluoroscopic imaging table, etc. Diagnosis can be made (for example, see Patent Document 1).

FIG. 5 shows an outline of an overhead traveling X-ray tube holding device in which the X-ray tube 7 is suspended from the ceiling traveling unit, the X-ray irradiation direction is directed to the floor surface, and the operation panel 8 is fixed to the fixed rail 1. The state set in the direction of is shown.
The overhead traveling X-ray tube holding device can move in the longitudinal direction (X direction) on the fixed rail 1 fixed to the ceiling, and has a moving rail 2 in the short direction (Y direction) at the lower part thereof. A carriage unit 3 is attached so that it can move in the Y direction on the rail 2, and can move in the XY direction. A support column 4 extending and contracting in the vertical direction (Z direction) is provided at the lower part, and an operation panel 8 provided with a collimator 10 with an X-ray tube 7, a handle 9, an operation switch, and a display unit is suspended at the lower end. To do.
The operation panel 8 includes a left / right movement unlocking switch for the ceiling carriage unit 3, a longitudinal movement unlocking switch, a vertical movement unlocking switch by extending / contracting the column 4, and the horizontal axis and vertical axis rotation of the X-ray tube 7. Operation switches such as a lock release switch are arranged. A display unit for displaying photographing conditions, tube angle, FFD, and the like is provided at the center, and an irradiation field lamp button for the collimator 10 is provided at the bottom.
After these switches are released, the X-ray tube is moved by moving the carriage part 3 on the ceiling and expanding / contracting the column 4, or operating the horizontal axis rotation lock release switch or the vertical axis rotation lock release switch of the X-ray tube 7. 7 can be rotated about the horizontal axis via the block 5 and can be rotated to a specific angle about the vertical axis.

An operator grasps the handle 9 of the operation panel 8 positioned in front of the X-ray tube 7, and operates the operation switches provided on the operation panel 8 (left-right movement lock release switch, front-rear movement lock release switch, vertical movement lock release switch, 3 The X, Y and Z direction electromagnetic locks are released by operating the direction lock release switch), and the column 4 suspended from the carriage unit 3 is moved on the fixed rail 1 and the moving rail 2 in the XY direction. The suspension column 4 can be expanded and contracted in the vertical Z direction, and the X-ray tube 7 can be freely moved in the X, Y, and Z directions and set at the imaging position. Then, a vertical axis rotation lock release switch having a function capable of rotating (vertical axis rotation) the X-ray tube 7 with respect to the vertical axis of the support column 4 is operated to rotate and fix at a specific angle. Further, the horizontal axis rotation lock release switch having a function capable of rotating (horizontal axis rotation) about the attachment axis of the X-ray tube 7 is operated, and the X-ray tube 7 is rotated and fixed around the horizontal axis. By the above operation, the collimator 10 attached to the X-ray emission port of the X-ray tube 7 can be directed to the imaging region of the subject.
JP-A-6-165773 (page 6, FIG. 6)

The conventional overhead traveling X-ray tube holding device is configured as described above. When the X-ray tube 7 is rotated around the horizontal axis, the rotation angle is displayed in an analog manner on the display unit of the operation panel 8. It was displayed with the shape pointer. Further, the X-ray imaging distance (vertical distance to the imaging table by vertical movement of the X-ray tube 7 or horizontal distance to the imaging stand by long manual operation) was displayed with a scaled nameplate and a pointer. Recently, a digital system is used, and the rotation angle of the X-ray tube 7 around the horizontal axis or the X-ray imaging distance is individually digitally displayed.
However, since the display accuracy is low in the analog method, it is difficult to read the angle and distance at an arbitrary position. In addition, each individual digital display has a problem that each display is small and difficult to read.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an X-ray tube holding device that displays the rotation angle or imaging distance of the X-ray tube with high accuracy and easy reading.

  In order to achieve the above object, an X-ray tube holding device according to the present invention includes an X-ray tube rotatably attached to a lower part of a column suspended from a ceiling via a horizontal axis through a block. An operation panel provided with an operation switch for unlocking the vertical movement and rotation of the X-ray tube, an operation handle attached to the operation panel, a rotation angle of the X-ray tube provided on the operation panel, or imaging A display unit that digitally displays the distance, and a control unit that controls the vertical movement of the column and the rotation of the X-ray tube by operating the operation switch on the operation panel, and the X-ray tube is moved up and down by operating the operation switch and the handle. In the X-ray tube holding device that can be moved and rotated to irradiate X-rays in a required direction, a means for detecting the rotation angle of the X-ray tube and an imaging distance from the X-ray tube to the imaging position are detected. Means and said A display control unit that controls the display to be switched between a rotation angle display and a shooting distance display. Depending on the type of the switch that is operated when the unlocking operation switch is turned on, the display on the display unit displays the angle or When the operation switch is turned off, the shooting distance display is displayed when the X-ray tube is in the horizontal or vertical position, and the angle display is displayed when the X-ray tube is in the oblique position.

  The X-ray tube holding device of the present invention is configured as described above, and a rotation angle detector for detecting the horizontal axis rotation angle position of the X-ray tube with a micro switch, a photo sensor, a potentiometer, or the like is used as the X-ray tube support shaft. An up / down position detector that detects the vertical position by expansion / contraction of the X-ray tube column with a photo sensor, potentiometer, etc. is provided on the column, and from the X-ray tube to the imaging position by data from the rotation angle detector and the vertical position detector An imaging distance detection mechanism for calculating the imaging distance is provided, and a display control unit is provided for switching and controlling the display of the digital display on the operation panel to display according to the type of switch operated on the operation panel and the direction of the X-ray tube. And when the display on the digital display on the operation panel turns on the operation switch for unlocking, the display on the display unit displays the angle display or shooting distance according to the operation switch. Information is displayed, to shooting distance display in the state of the X-ray tube horizontal position or vertical position when the OFF operation switch, the X-ray tube is controlled to be in the angle display in the state of oblique.

  The X-ray tube holding device of the present invention is configured as described above, and the horizontal rotation angle and the vertical position of the X-ray tube are detected by the detector by the operation of the operation switch on the operation panel. The imaging distance from the X-ray tube to the imaging position is automatically calculated. When the operator turns on the rotary operation switch, the rotation angle is displayed on the digital display, and when the up / down operation switch is turned on, the photographing distance is displayed. When the operator turns off the operation switch, the shooting distance is displayed when the X-ray tube is in the horizontal or vertical position, and the angle is displayed when the X-ray tube is in the oblique position. And the rotation angle can be read. As a result, the oblique imaging angle of the subject becomes accurate, and the X-ray condition can be accurately set according to the imaging distance. Compared with the conventional analog display, the accuracy is better. With the digital display, the display itself can be designed to be larger and the visibility is improved. be able to. In addition, since a set of digital displays may be prepared and a display control circuit may be configured, the manufacturing cost of the operation panel can be reduced.

  The X-ray tube holding device of the present invention operates the operation switch of the operation panel 8 to rotate the X-ray tube 7 to a specified angle and set an appropriate imaging distance. A device capable of switching the display (angle display or shooting distance display) of the digital display according to the horizontal position, vertical position and oblique position of the tube 7 was realized.

An embodiment of the ceiling-suspended X-ray tube holding device of the present invention will be described with reference to FIG. FIG. 1 shows an operation control system diagram of the present X-ray tube holding device.
The X-ray tube holding device of the present invention includes an X-ray tube 7 rotatably attached to a lower part of a support column 4 shown in FIG. 5 suspended from a ceiling via a block 5 via a horizontal axis thereof. An operation panel 8 provided with a vertical movement unlocking switch 12 and a rotation movement unlocking switch 11 of the X-ray tube 7 and a digital display provided on the operation panel 8 for digital display of the rotation angle or imaging distance of the X-ray tube 7 13, an operation handle 9 attached to the operation panel 8, and a control unit 14 that operates the operation switch of the operation panel 8 to control the vertical movement of the column 4 and the rotation of the X-ray tube 7 with a lock mechanism; The rotation angle detector 15a that detects the rotation angle of the X-ray tube 7 with the rotation angle detector 15a and the electrical conversion circuit 15b, the vertical position detector 16a that detects the vertical position of the X-ray tube 7, and the electrical rotation angle Conversion times 15b and an imaging distance detection mechanism 16 having a calculation unit 16c for calculating an imaging distance between the X-ray tube 7 and the imaging table based on signals from the electrical conversion circuit 16b at the upper and lower positions, and a rotation angle display on the display of the digital display 13. And a display control unit 17 for switching and controlling the photographing distance display.

  The X-ray tube holding device is different from the conventional device in that the conventional device rotates the X-ray tube 7 shown in FIG. The X-ray imaging distance is displayed as a vertical distance to the imaging table by the vertical movement of the X-ray tube 7 or the horizontal distance is indicated by a scaled nameplate and the pointer. In the digital display, the rotation angle around the horizontal axis of the X-ray tube 7 or the X-ray imaging distance is individually digitally displayed. On the other hand, the present X-ray tube holding device is provided with a display control unit 17 for switching the display of the digital display 13 between the rotation angle display and the imaging distance display, and the rotation movement unlock switch 11 or the vertical movement lock release switch 12 is provided. When turned on, the display on the digital display 13 becomes an angle display or a shooting distance display according to the type of switch on the operated side, and when the rotary motion unlock switch 11 or the vertical motion unlock switch 12 is turned off, the X-ray When the tube 7 is in the horizontal or vertical position, the photographing distance is displayed, and when the X-ray tube 7 is in the oblique position, the angle is displayed. As a result, necessary information is displayed when the operation switch is turned on, and after the operation switch is turned off, the display is switched according to the state of the X-ray tube 7, and not only the vertical distance but also the distance in the oblique angle photographing is displayed.

FIG. 2 shows a state in which the display of the digital display 13 is switched depending on the direction of the operation panel 8 of this apparatus, (a) shows the time when the X-ray tube is in the horizontal position, and (b) shows the X-ray tube being vertical. (C) shows the time when the X-ray tube is oblique.
In (a), when the handle 9 is grasped and the vertical movement unlocking switch 12 of the operation panel 8 is pressed and the X-ray tube 7 shown in FIG. 5 is moved up and down, the photographing distance is displayed on the digital display 13. . When the rotary movement unlock switch 11 is pressed, the digital display 13 displays a rotation angle of 0 °. When the operation switch is released, the shooting distance display is displayed.
In (b), when the handle 9 is grasped and the rotational movement lock release switch 11 of the operation panel 8 is pressed to rotate the X-ray tube 7 to the vertical position, the rotation angle is displayed on the digital display 13 at the time of rotation. When the operation switch is released, the stored shooting distance to the standing position shooting stand is displayed. The shooting distance is displayed in the same manner even when the vertical movement lock release switch 12 is pressed.
In (c), when the X-ray tube 7 is rotated by grasping the handle 9 and pressing the rotational movement unlock release switch 11 of the operation panel 8, the rotation angle is displayed on the digital display 13. Even if the operation switch is released, the rotation angle of the X-ray tube is displayed. Further, when the vertical movement lock release switch 12 is pressed in this state, the photographing distance in the oblique position is displayed.

Next, components of the ceiling-suspended main X-ray tube holding device will be described with reference to FIGS. 1 and 5.
The X-ray tube 7 is attached to a lower part of a support column 4 suspended from a ceiling in a telescopic manner via a block 5 so as to be rotatable through its horizontal axis, and a collimator 10 is attached to an X-ray emission port.
The operation panel 8 includes a rotary motion unlocking switch 11 on which an operation display symbol is displayed, a vertical motion unlocking switch 12, a digital display 13 at the center, and a handle 9 attached to the X-ray tube 7 integrally. The control unit 14 (not shown) is disposed behind. Then, the handle 9 is grasped and the locks are released by the operation switches (the rotation movement unlocking switch 11 and the vertical movement unlocking switch 12) of the operation panel 8, and the X-ray tube 7 is connected to the block 5 via the horizontal axis. Rotate and expand and contract the support 4 to move up and down.
The digital display 13 is provided at the center of the operation panel 8 and digitally displays the rotation angle or imaging distance of the X-ray tube 7 and has a size that is easy to observe.
The handle 9 is attached to the operation panel 8 integrally with the X-ray tube 7 and is attached to the periphery of the operation panel 8 in a circular shape. An operation switch (rotation) provided on the operation panel 8 while holding the handle 9 is attached. The movement lock release switch 11 and the vertical movement lock release switch 12) are released to position the X-ray tube 7 manually.
The control unit 14 is disposed at the rear of the operation panel 8 and operates the operation of the support column 4 and the X-ray tube 7 when the operation switches (the rotation movement unlocking switch 11 and the vertical movement unlocking switch 12) of the operation panel 8 are operated. A function for controlling rotation lock / release and a display control unit 17 for switching the display of the digital display 13 to the shooting distance display or the angle display are incorporated.
The rotation angle detection mechanism 15 is a mechanism that detects the rotation angle of the X-ray tube with respect to the horizontal axis. The rotation angle detection mechanism 15 is provided in the block 5 or the like to which the X-ray tube 7 is attached. And an electric conversion circuit 15b.
The vertical position detector 16 a is a detector that is provided at the lower end of the column 4 and detects the vertical position of the X-ray tube 7 due to the expansion and contraction of the column 4. A photo sensor, a potentiometer, or the like is used. Then, the vertical distance h is calculated by subtracting the height of the upper surface of the imaging table from the value detected by the expansion and contraction of the column 4 by the electrical conversion circuit 16b. Calculated.
The imaging distance detection mechanism 16 calculates the imaging distance between the X-ray tube 7 and the imaging position based on the rotation angle and the electrical signal of the vertical position. From the vertical position detector 16a, the electrical conversion circuit 16b, and the calculation unit 16c. Composed. The calculation unit 16c is configured to calculate the vertical distance h from the focal point of the X-ray tube detected by the vertical position detector 16a to the upper surface of the imaging table and the rotation angle θ of the X-ray tube 7 detected by the rotation angle detector 15a. Vertical distance h / cos θ = calculation distance is calculated.
When imaging is performed with the X-ray tube 7 shown in FIG. 5 in a vertical position, the distance to the imaging table is input to and stored in the display control unit 17 at the time of installation or thereafter, and is automatically set to the imaging distance. And read out. The definition of the rotation angle is switched by 90 ° and digitally displayed by the same mechanism.
The display control unit 17 is built in the control unit 14 and is operated according to the type of the switch operated when the unlocking operation switches (the rotational movement unlocking switch 11 and the vertical movement unlocking switch 12) are turned on. When the X-ray tube 7 is in the horizontal position or the vertical position when the operation switch is turned OFF, the shooting distance display is displayed as shown in FIGS. 2 (a) and 2 (b). Thus, when the X-ray tube 7 is in the oblique position, the display of the digital display 13 is controlled to be switched between the rotation angle display and the photographing distance display so that the angle is displayed as shown in FIG.

Next, the operation of the X-ray tube holding apparatus will be described with reference to FIG. 1 showing the control system.
FIG. 3 shows an operation procedure when performing oblique incidence imaging with the X-ray tube 7. When the rotation lock release switch 11 of the operation panel 8 is turned on (pressed), the lock mechanism of the control unit 14 is released, and the X-ray tube 7 is rotated to a desired angle on the horizontal axis by grasping the handle 9 of the operation panel 8. To do. A signal is sent from the operation panel 8 to the display control unit 17. Here, the rotation angle is once displayed. When the X-ray tube 7 is rotated, the rotation angle detector 15a detects the rotation angle, and sends the signal to the display control unit 17 and the calculation unit 16c of the imaging distance detection mechanism 16 via the electrical conversion circuit 15b. Here, the digital display 13 displays the rotation angle. Further, the vertical position detector 16a of the X-ray tube 7 detects the vertical position, and the signal is sent to the arithmetic unit 16c via the electrical conversion circuit 16b. The calculation unit 16c is based on the vertical distance h from the focal point of the X-ray tube 7 detected by the vertical position detector 16a to the upper surface of the imaging table and the rotation angle θ of the X-ray tube 7 detected by the rotation angle detector 15a. Vertical distance h / cos θ = shooting distance is calculated. Then, the value is sent to the display control unit 17, and when the X-ray tube 7 is rotated, the vertical movement unlocking switch 12 is turned on (pressed), and the photographing distance from the oblique direction is displayed on the digital display 13. . When the rotary motion unlocking switch 11 or the vertical motion unlocking switch 12 is turned off (released) while the X-ray tube 7 is in the oblique position, the digital display 13 displays the rotational angle (display according to the direction of the X-ray tube 7). To do. Then, the rotation angle and shooting distance are confirmed, shooting conditions are set, and shooting is performed.
FIG. 4 shows an operation procedure when the X-ray tube 7 is moved up and down to be positioned and normal incidence imaging is performed. When the vertical movement unlocking switch 12 of the operation panel 8 is turned on (pressed), the lock mechanism of the control unit 14 (not shown) on the back of the operation panel 8 is released, and the handle 9 of the operation panel 8 is gripped to perform X-rays. The tube 7 is positioned at a desired height position. A signal is sent from the operation panel 8 to the display control unit 17. Here, the shooting distance is once displayed. When the X-ray tube 7 is moved up and down, the rotation angle detector 15a detects a rotation angle of 0 degree, and the signal is sent to the display control unit 17 and the calculation unit 16c of the imaging distance detection mechanism 16 via the electrical conversion circuit 15b. It is done. Then, the vertical position detector 16a of the X-ray tube 7 detects the vertical position, and the signal is sent to the arithmetic unit 16c via the electrical conversion circuit 16b. The calculation unit 16c is configured to detect the vertical distance h from the focal point of the X-ray tube 7 detected by the vertical position detector 16a to the upper surface of the imaging table and the rotation angle θ = 0 of the X-ray tube 7 detected by the rotation angle detector 15a. From the angle, the vertical distance h / cos θ = shooting distance is calculated. Then, the signal is sent to the display control unit 17, where the digital display 13 displays the shooting distance. When the rotational movement unlock switch 11 is pressed with the X-ray tube 7 in the horizontal position, the rotation angle 0 ° is displayed on the digital display 13. When the X-ray tube 7 is in the horizontal position and the rotational movement unlocking switch 11 or the vertical movement unlocking switch 12 is turned off (released), the digital display 13 displays the imaging distance (display according to the direction of the X-ray tube 7). ) Is displayed. Then, the rotation angle and shooting distance are confirmed, shooting conditions are set, and shooting is performed.

It is the figure which showed the control system of one Example of the X-ray tube holding | maintenance apparatus of this invention. It is the figure which made the operation panel of the X-ray tube holding | maintenance apparatus of this invention the horizontal, vertical, and diagonal state. It is a figure which shows the procedure which rotates the operation panel of the X-ray tube holding | maintenance apparatus of this invention. It is a figure which shows the procedure which operates the operation panel of the X-ray tube holding device of this invention up and down. It is a figure for demonstrating the conventional X-ray tube holding | maintenance apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed rail 2 Moving rail 3 Carriage part 4 Support | pillar 5 Block 7 X-ray tube 8 Operation panel 9 Handle 10 Collimator 11 Rotation movement lock release switch 12 Vertical movement lock release switch 13 Digital display 14 Control part 15 Rotation angle detection mechanism 15a Rotation Angle detector 15b Electrical conversion circuit 16 Shooting distance detection mechanism 16a Vertical position detector 16b Electrical conversion circuit 16c Calculation unit 17 Display control unit

Claims (1)

  An X-ray tube that is rotatably attached to the lower part of a column suspended from the ceiling via a horizontal axis through a block, and an operation switch for unlocking the vertical movement and rotation of the X-ray tube An operation panel attached to the operation panel, a display unit provided on the operation panel for digital display of the rotation angle or imaging distance of the X-ray tube, and an operation switch on the operation panel. And a control unit for controlling the vertical movement of the column and the rotation of the X-ray tube, and the X-ray tube can be moved up and down by operating the operation switch and the handle to rotate the X-ray and irradiate the X-ray in the necessary direction. In the X-ray tube holding device, the means for detecting the rotation angle of the X-ray tube, the means for detecting the imaging distance from the X-ray tube to the imaging position, and the display on the display unit are switched between the rotation angle display and the imaging distance display. Control A display control unit is provided, and when the operation switch for unlocking is turned on, the display on the display unit becomes an angle display or an imaging distance display according to the type of the switch operated, and when the operation switch is turned off, the X-ray tube An X-ray tube holding device characterized in that an imaging distance is displayed in a horizontal or vertical position and an angle is displayed in an oblique position of the X-ray tube.

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