JPH1164247A - Method for adjusting x-ray center axis of x-ray generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the adjustments of the center axes of a portable X-ray generator and an X-ray detector simply and accurately by moving the detector in the direction to the center with reference to the location of the center estimated by a diaphragm X-ray image. SOLUTION: X-rays 15 from an X-ray generator 2 are reduced by an X-ray diaphragm device 14 and are brought to radiate toward an object to be inspected 1. The X-ray diaphragm device 14 is shaped e.g. like a star, irradiating X-rays 15 is shaped like a star, and it is possible to determine the center of the shape of the star immediately. Then from a star-shaped X-ray fluoroscopic image 16 obtained by an X-ray detector 3 and an image processing device 4, the direction to the center is estimated. Next, on the basis of this estimation, the X-ray detector 3 is moved in the direction of the estimated center. In addition, the X-ray generator 2 may be moved and adjusted simultaneously with the X ray detector 3. In this way, as the center axes are adjusted by estimating the center of the diaphragm X-ray radioscopic image, it is possible to perform adjustments simply and accurately, and particularly it is possible to perform adjustments at a large scale plant site.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting an object to be inspected, and more particularly to a method for adjusting an X-ray central axis of an X-ray generator.

[0002]

2. Description of the Related Art When inspecting an object to be inspected using X-rays, it is necessary to align the center axes of the X-ray generator and the X-ray detector. Since the center axis of the X-ray detector is adjusted beforehand and installed, there is no need for an operation of adjusting the center axis during use. On the other hand, in portable X-ray diagnostic apparatuses, in order to align the central axes of the X-ray generator and the X-ray detector at the time of use, the center axis adjustment work is performed by obtaining a measured or calculated position. .

[0003]

With the conventional center axis adjusting method, not only high-precision adjustment is impossible, but also much time is required to adjust the center axis. In order to make full use of the features of the portable X-ray diagnostic apparatus, it is essential that the X-ray center axis can be easily adjusted.

[0004] In view of the above, the present invention, when carrying out an X-ray inspection method using a portable X-ray generator and an X-ray detector, simply and accurately adjusts the center axes of both. It is an object of the present invention to provide a method of adjusting an X-ray center axis of an X-ray generator capable of performing the above-described operation.

[0005]

SUMMARY OF THE INVENTION According to the present invention, an object to be inspected is processed by narrowing the object to be inspected and causing an X-ray generator to face one side and an X-ray detector to the other side, and processing an obtained signal by image processing. X-ray center axis adjustment method of an X-ray generator in the method, wherein the X-ray generated by the X-ray generator is squeezed, the narrowed X-ray is irradiated on the inspection object, and the X-ray transmitted through the X-ray detector And processing the detected signal with an image processing device to form a diaphragm X-ray fluoroscopic image, estimating the center position of the diaphragm X-ray fluoroscopic image, and moving the detector to the center with reference to the estimated center position. An object of the present invention is to solve the above-mentioned problem by an X-ray center axis adjusting method of an X-ray generator, which is characterized by moving in an X-ray direction. As described later, the center position of the diaphragm X-ray fluoroscopic image can be estimated or obtained very easily.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which a portable X-ray generator 2 and an X-ray detector 3 are used for inspecting an object 1 to be inspected.

The X-ray generator 2 is installed on a lifter 4,
The line detector 3 is mounted on a lifter 5 and can be moved up and down, and can be horizontally swung by horizontal swing elevation shakers 6 and 7, as shown in FIG. FIG.
As shown in FIG. 1, the inspection object 1 is placed on, for example, a pedestal 10. Reference numeral 4 denotes an image processing apparatus, which is separated from the X-ray generator 2 and the X-ray detector 3 by a partition 11 and is connected to the X-ray detector 3 by a wiring 12.

The X-ray generator 2 is provided with an X-ray diaphragm 14. In FIG. 3, when the X-ray generator 2 is operated, an electron beam 16 is generated in an X-ray tube 15, which is bent at right angles to a target 17, so that an X-ray diaphragm 14 is formed.
, The X-rays 15 are squeezed here and emitted toward the inspection object 1. The X-ray diaphragm 14 has a star shape, for example, as shown in the figure, and its center can be immediately estimated. Therefore, the object 1 is radiated, that is, the object 1
From the viewpoint, the irradiated X-ray forms a star shape as shown in FIG. The X-ray detection range of the X-ray inspection device 3 is set as shown in FIG. 4 in accordance with the star shape, and is detected by nine detection points 18.

The center 19 of the star in the X-ray detection range can be immediately identified.

A portable X-ray generator 2 having such a configuration
Next, a method of adjusting the X-ray central axis of the X-ray detector will be described.

In FIG. 5, the X-ray diaphragm 14 is set on the X-ray generator 2 (step 101). The X-ray generator 2 and the X-ray detector 3 are positioned via the inspection object 1 (step 102). An X-ray 15 is generated, and it is estimated from the star-shaped aperture X-ray fluoroscopic image 16 obtained by the X-ray detector 3 and the image processing apparatus 4 in which direction the center 18 of the aperture X-ray fluoroscopic image is located (step). 103). An X-ray intensity distribution indicating the relationship between the X-ray center and the surrounding position is formed, and the position of the X-ray generator 2 is determined from the X-ray image obtained by the X-ray detector 3. Next, the X-ray detector 3 is moved toward the center based on the estimation (step 104). It is determined whether the center of the display image is at the center 18 of the aperture X-ray fluoroscopic image, and “N
In the case of "O", the process returns to step 103 and readjustment is performed.
In the case of S ", the adjustment is terminated. In the above case, the method of moving and adjusting the X-ray detector has been described, but this does not prevent the adjustment of the X-ray generator.

[0013]

As described above, according to the present invention, the X-ray generator and the X-ray detector are separated from each other by using the X-ray generator and the X-ray detector. Inspection object, X
The center axis of the X-ray generator is adjusted by estimating the center of the aperture X-ray fluoroscopic image by forming, for example, an X-ray intensity distribution corresponding to the distance of the X-ray detector. Can be performed very simply and accurately. In particular, there is an advantage that adjustment is quickly performed at a large plant site.

[Brief description of the drawings]

FIG. 1 is a diagram showing an arrangement of devices used in the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a partially detailed view of FIG. 1;

FIG. 4 is a view showing the operation of FIG. 1;

FIG. 5 is a diagram showing a flow relating to one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Inspection object, 2 ... X-ray generator, 3 ... X-ray detector, 4 ...
Image processing device, 5: Lifter, 7: Horizontal swing elevation shaker,
14 ... X-ray diaphragm, 15 ... X-ray, 16 ... Star-shaped diaphragm image,
18: detection point, 19: center of the star-shaped aperture transmission image

Claims (1)

[Claims] An X-ray generator according to an inspection method for inspecting an object, in which an X-ray generator is opposed to one side of the inspected object and an X-ray detector is opposed to the other side, and an obtained signal is image-processed. X-ray center axis adjustment method, in which the X-rays generated by the X-ray generator are squeezed, the focused X-rays are irradiated on the inspection object, the X-rays transmitted by the X-ray detector are detected, and the detected signal is detected. Is processed by an image processing apparatus to form a diaphragm X-ray fluoroscopic image, a center position of the diaphragm X-ray fluoroscopic image is estimated, and the detector is moved in the center direction with reference to the estimated center position. X-ray center axis adjustment method of the X-ray generator.