JPH0771554B2 - Control system of X-ray fluoroscopy platform - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for an X-ray fluoroscopic imaging table, and in particular, both the imaging system unit and the top plate unit are movable in the body axis direction of the subject. The present invention relates to improvement of operability of a fluoroscopic imaging stand.

[Background of the Invention]

In the conventional device as described above, movements of the image system device portion and the top plate portion in the body axis direction of the subject (hereinafter, referred to as vertical movements) are moved at different moving speeds or at the same speed. In addition, each of them also performs a retracting operation to prevent contact with the floor surface. In this method, when the operator tilts the tabletop while observing the fluoroscopic image, some of them move separately when they come to a position where they are likely to come into contact with the floor surface (there is a possibility of contact with the floor surface. Only the part moves.) Therefore, the affected part was out of the fluoroscopy field, and the operator had to perform another operation to move either of them to the other. This will be explained with reference to the drawings. FIG. 2 shows the top plate 5 in a horizontal position while observing the affected area 8a. The gap A between the image system unit and the floor is appropriate in the horizontal position,
Further, the distance is such that when it is tilted in the reverse tilt direction, it comes into contact with the floor surface. Therefore, conventionally, when the operator operates in the reverse tilt direction, the image system device unit 9 is automatically moved in the foot side direction of the subject 8 (direction of arrow F), and as shown in FIG. The reverse tilt operation was performed after the position where the gap B between the image system unit 6 and the floor surface was appropriately maintained. Video system unit 9
Has moved by the distance S, the subject 8 or the top plate 5 must be moved by the distance S when observing the affected area 8a. FIG. 3 is a diagram in which the affected area 8a is positioned so that it can be observed in the center of the X-ray irradiation field. As described above, conventionally, for example, when the video system device unit 9 comes into contact with the floor surface, only that part is retracted, so that the operator has to perform the operation of moving the top plate each time.

[Object of the Invention]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a control system for an X-ray fluoroscopic imaging table in which the positional relationship between the image system device and the top plate does not change regardless of the operator's intention. To do.

[Outline of Invention]

The above problem is that the moving speeds of the image system device section and the top plate section are the same, and when one side moves (retracts) to avoid contact with an obstacle such as a floor surface, This is achieved by moving the other at the same time in accordance with the contact with.

Example of Invention

 An embodiment of the present invention will be described with reference to FIG.

A top plate support portion 3 is fixed to a sector gear 2 pivotally supported by a support base 1. The pinion 4 meshes with the sector gear 2, and by rotating it, the top plate 5 movably supported in the vertical and horizontal directions on the top plate supporting portion 3 and the top plate supporting portion 3 movably supported in the vertical direction. The image system unit 6 is integrated with the X-ray tube device unit 7 that faces the top plate 5 and can be tilted from an upright position (90 °) to a reverse tilt position (−30 °). When a transparent image of X-rays emitted from the X-ray tube device portion 7 toward the affected part 8a of the subject 8 is converted into visible light by the image system device 6 for fluoroscopic diagnosis, an operation desk (not shown) is displayed. The operator operates the operation switch of to set the switch to the optimum position for observation. In the X-ray fluoroscopic diagnosis of the digestive tract system in which barium sulfate must be attached to the inner wall surface of the cylindrical or spherical surface to observe the X-ray shadow image, the subject 8 from the standing position to the inverted tilt position
Need to move. In this type of device, the positioning operation of the affected part 8a in the body axis direction is normally performed without moving the top plate 5 (subject 8), and the image system device 6 and the X-ray tube device part 7 are integrated. This is done by moving the part 9. In the present invention, the top plate 5 and the image system device part 9 are placed in the same direction with respect to the top plate support part 3 from the reverse tilt position of FIG. 3 to the horizontal position of FIG. 4 to the standing position of FIG. By moving at the same speed, the affected area 8a can always be observed. For convenience of explanation, the operation of the conventional device is shown in FIG. 2 side by side in FIG. 5, but the operation of the present invention is started from the standing position of FIG. When operated, the affected area 8a does not deviate from the observation center by the distance S as shown in FIG. That is, as shown in FIG. 2, the top plate 5 and the image system device unit 9 move to appropriate positions in the same direction and speed in the arrow F direction, and then as shown in FIG. When the horizontal position of FIG. 4 is changed to the vertical position of FIG. 1, the top plate 5 and the video system device 9 move in the same direction and speed in the direction of arrow G shown in FIG. Then, after the lower end 5a of the top plate moves to a position where it does not come into contact with the floor surface, the standing position is as shown in FIG. In this method, although it does not occur in normal photographing of the digestive tract, there is a possibility that the top plate 5 and the image system device unit 9 do not move to a predetermined position because of a difference in vertical movement stroke. In this case, only the object that comes into contact with the floor will be retracted, and the affected part will be displaced from the center of the image system, but this is unavoidable. In carrying out the present invention, both speeds become a problem, but the speed of the top board on which the subject rides is conventionally 40 to 50 mm / S, and the speed of the image system device section is 40 to 90 mm / S. , 50mm / S should be matched. Further, increasing the moving speed of the patient is not so good because the anxiety of the subject increases. If the moving speed of the video system unit is slowed down only for the purpose of the present invention, the efficiency at the time of normal alignment will be reduced. Sometimes it may be possible to move at high speed.

〔The invention's effect〕

As described above, by causing the image system device section and the top plate section to move at the same time in the vertical direction at the same time, the conventional apparatus causes an image shift unintended by the operator. Without this, the operator can concentrate on the diagnosis of the fluoroscopic image.

[Brief description of drawings]

The attached drawings show the relationship between the tilting movement of the tabletop and the movement of the image system device / tabletop. In Fig. 1, the tabletop is in a standing position, in Fig. 2 the tabletop is in a horizontal position, and in Fig. 3 is shown. The state where the tabletop is moved to the reverse tilt position from the state of FIG. 2, the state where the tabletop is in the horizontal position from the state of FIG. 3 is shown in FIG. 4, and FIG. 5 is an example of the conventional control method. FIG. 1 ... Support base, 3 ... Top support part, 5 ... Top plate, 6 ...
Imaging system part, 7 ... X-ray tube device part, 8 ... Subject, 8a ...
Affected part, 9 ... Image system device part, A, B ... Clearance between image system device part and floor.

Claims (1)

[Claims] 1. An image system device unit and a top plate unit both have independent drive units and are movable in the body axis direction of the subject, and the top plate can be tilted from an upright position to an inverted tilt position. In an X-ray fluoroscopic imaging stand, the image system device unit can be driven at a moving speed that includes the same moving speed as the moving speed of the tabletop, and the tabletop can be moved up and down from the current tabletop angle to a desired direction and angle. In this case, it is detected in advance that at least one of the image system device section and the top plate section comes into contact with the floor surface, and both are moved at a constant speed until the position where the image system apparatus and the top panel section do not contact the floor surface. A control method for an X-ray fluoroscopic imaging table, which is characterized by retracting at the same time.