JPH0558108U - X-ray TV device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an X-ray television device which automatically corrects the position movement of the subject due to body posture change so that the image on the display device does not fall out of the visual field. In an X-ray television apparatus equipped with a table on which a subject is placed, a sheet-like belt installed on a tabletop and a position movement of the subject due to body position change on the belt The detection means and the means for moving the belt along the top plate surface based on the signal from the position movement detection means are provided, and the position of the subject is corrected in accordance with the body position change.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an X-ray television apparatus equipped with a subject mounting table, and more particularly to an X-ray television apparatus that automatically corrects the position movement of the subject due to body position change.

[0002]

[Prior Art]

 FIG. 4 is a configuration diagram showing a main part of a known X-ray television apparatus. As shown in FIG. 4, the X-ray television device includes an X-ray tube device 1, a collimator 2, and a top plate 4 on which the subject 3 is placed (the top plate 4 constitutes a part of a table. ), A film dividing plate 5, and a quick-shooting device 6 which is moved to a shooting position or a retracted position by an operation from an operator console (not shown) (in FIG. 4, the quick-shooting device 6 is installed at the shooting position). The image intensifier 7, the television camera 8, and the CRT display device 9 provided on the operator console are provided.

In the above-mentioned configuration, the image of the subject 3 is confirmed and positioned by fluoroscopy prior to the X-ray film photographing. That is, the X-rays emitted from the X-ray tube device 1 pass through the collimator 2 and the subject 3 in the open state, are amplified by the image intensifier 7 as an X-ray fluoroscopic image, and are converted into video signals by the TV camera 8. To be done. The video signal of the X-ray fluoroscopic image is displayed on the CRT display device 9. The operator moves the top plate 4 while checking the fluoroscopic image of the CRT display device 9 or prompts a posture change (becomes a recumbent state or a supine state) through a dialogue with the subject 3 to detect the subject 3. Positioning is performed so that a fluoroscopic image of the desired site can be obtained. When the positioning is completed, X-ray film photography is performed. Usually, the film is photographed by dividing it into a plurality of areas (2 to 6 divisions). Therefore, the opening of the collimator 2 is adjusted so that the X-ray is irradiated only to the area where the image is taken. Here, the X-ray fluoroscopy to the CRT display device 9 is cut off, and the quick shooting device 6 is moved from the retracted position to a predetermined shooting position. After that, X-rays for photographing are irradiated, and the film of the quick-shooting photographing device 6 is exposed with X-ray images. When the film exposure of the X-ray image is completed, the quick shooting device 6 returns to the retracted position. At this point, the collimator 2 is opened, and X-ray irradiation for fluoroscopy on the CRT display device 9 is started. After that, when the X-ray imaging of another region of the subject 3 is started, the above positioning is repeated.

[0004]

[Problems to be solved by the device]

 By the way, in the above positioning, when the body position of the subject 3 is changed, that is, the body 3 is rotated in an attempt to create a recumbent state or a supine state, the body axis of the subject 3 is in the lateral direction (longitudinal direction of the top plate). There is a problem that the CRT is displaced from the display surface of the CRT display device 9 (out of the visual field).

The present invention has been made in view of the above, and an object of the present invention is to automatically correct the position movement of the subject due to body posture change and prevent the image of the display device from being out of the visual field. An X-ray television device is provided.

[0006]

[Means for solving problems]

 The X-ray television apparatus of the present invention that achieves the above object is an X-ray television apparatus including a table on which a subject is placed, and a sheet-like belt installed on the top plate of the table and the belt. The position of the subject due to the change in body position is provided with means for detecting the position movement of the subject due to the change in the body position in the subject and means for moving the belt along the top plate surface based on the signal from the position movement detecting means. The feature is that correction is performed.

[0007]

[Action]

 The above-mentioned X-ray television device detects the displacement of the subject from a predetermined position, and based on the signal, moves the belt left and right or up and down to pull the subject back to the predetermined position. As a result, it is possible to prevent the subject from being displaced from the visual field due to the change in body posture.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings. 1 and 2 are configuration diagrams showing an embodiment of the present invention, FIG. 1 is an overall configuration diagram, and FIG. 2 is an explanation of the relationship between the top plate (table), belt and subject. It is a figure. Each symbol has the same meaning as in FIG. The top plate 4 is shown in FIG. 1 as a sectional view orthogonal to the longitudinal direction (the long axis of the top plate), and in FIG. 2 as a perspective view with a part omitted. A sheet-shaped subject moving belt 11 is installed on the top plate 4, and the subject 3 is placed on the belt 11. The belt 11 is connected to the drive shafts 12a and 13a directly connected to the belt driving motors 12 and 13 on both sides of the top plate 4, and is driven by the motor 12 or 13 in the direction of the arrow 23, that is, along the surface of the top plate 4. It is configured so that it can be moved. The weighing scales 16 and 17 installed on the table support unit 15 detect the weights at both ends of the top plate 4 via the top plate support unit 14. The detected weight detection signal is input to the weight comparator 18 having an offset adjuster 22. These weighing scales, weight comparators and the like constitute a means for detecting the position movement of the subject 3 due to the change in body position. The motor control unit 19 receives the weight difference signal from the weight comparator 18, and controls the belt driving motors 12 and 13 via the motor driving units 20 and 21. The motor control unit, the motor driving unit, the belt driving motor, and the like constitute a unit that moves the belt 11 along the top surface based on the position movement signal of the subject 3.

In the above configuration, the center of gravity of the top plate 4 is always at the center of the top plate 4, and the weight detection signals from the weighing scales 12 and 13 have the same value when the subject is not placed. Therefore, when the subject is not placed and the offset adjuster 22 is set to 0, the signal from the weight comparator 18 becomes 0, and the motor controller 19 drives both the belt drive motors 12 and 13. do not do. That is, the belt 11 is in a stopped state (there is no movement in the direction of arrow 23). Even when the subject 3 is placed on the top plate 4, the body axis of the subject 3 is on or near the long axis of the top plate 4, and the weight balance on the left and right of the top plate 4 changes. If there is not, the weight detection signals from the weight scales 12 and 13 have the same value, and again the motor control unit 19 does not drive either of the belt driving motors 12 and 13 and the belt 11 does not move. On the other hand, when the body axis moves to the right from this state due to the posture changing operation of the subject 3, the weight detection signal of the weight scale 16 becomes larger than the weight detection signal of the weight scale 17, so that the weight comparator 18 makes a difference. Output a signal. Based on this difference signal, the motor control unit 19 drives the belt drive motor 13 until the signal from the weight comparator 18 becomes 0 (at this time, the drive shaft 12a directly connected to the motor 12 is in a rotatable state). , The belt 11 is moved leftward. Then, when the body axis of the subject 3 comes on or near the long axis of the top plate 4 and the left and right weights of the top plate 4 are balanced, the movement of the belt 11 is stopped. This completes the position correction of the subject 3. In contrast to the above, when the body axis of the subject 3 moves to the left, the motor control unit 19 controls the belt 11 to pull to the right due to an increase in the weight detection signal of the weighing scale 17. As a result, the position of the subject 3 is corrected. Therefore, even if the body axis is displaced in any direction as the body position of the subject 3 is changed, the position of the subject 3 is automatically corrected, and it is possible to prevent the display device from being out of the visual field. By setting the setting value of the offset adjuster 22 to a value other than 0, the left and right weight balances of the top plate 4 can be adjusted even when the body axis of the subject 3 is off the long axis of the top plate 4 or in the vicinity thereof. Can be taken.

The present invention is not limited to the above embodiment. For example, a weight scale is installed at four corners of the top plate (four pieces are provided), and a mechanism for moving the belt in the longitudinal direction of the top plate is also provided. The position of the subject may be corrected horizontally and vertically. Also, instead of the weight comparison method, a large-diameter image intensifier as shown in Fig. 3 is used, and when the position of the subject is deviated from the center, it is switched to a wide field of view and the image at that time is used. The displacement of the sample may be calculated, and the belt may be moved based on the result.

[0011]

[Effect of the device]

 As described above, according to the X-ray television device of the present invention, the displacement of the subject from the predetermined position is detected, and the belt is moved to the left or right or up and down based on the signal to move the subject to the predetermined position. By pulling back, it is possible to prevent the image from being out of the visual field of the display device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating a relationship among a top plate, a belt, and a subject in an embodiment of the present invention.

FIG. 3 is an explanatory view of another embodiment of the present invention.

FIG. 4 is a configuration diagram showing an X-ray television device.

[Explanation of symbols]

 3 Specimen 4 Top Plate (Table) 11 Belt 12, 13 Belt Drive Motor 16, 17 Weight Scale 18 Weight Comparator 19 Motor Control Unit 20, 21 Motor Drive Unit 22 Offset Adjuster

Claims (1)

[Scope of utility model registration request] 1. An X equipped with a table on which a subject is placed.
In a line television device, a sheet-shaped belt installed on a table top, a position movement detection unit that detects a position movement of a subject due to a posture change on the belt, and a position movement detection unit An X-ray television apparatus comprising: a means for moving a belt along a top plate surface based on a signal;