JPH01161229A - X-ray stereoscopic photographing device - Google Patents

Abstract

PURPOSE:To attain simple stereoscopic photographing by measuring a 1st image with the rotating location of a rotary sample stand positioned counterclockwise when an observer can overlook an object, measuring a 2nd image with said location positioned clockwise, and observing the 1st image with his left eye and the 2nd image with his right eye. CONSTITUTION:The title device is constituted such that when the rotary sample stand is positioned counterclockwise, an image is observed with an observer's left eye, and when said stand is positioned clockwise. Then an image is observed with his right eye, points P and Q are visually recognized as an intersection P0, Q0 between a straight line connecting the left eye 26 of the observer 25 and display points p1' and q1' and a straight line connecting his right eye 27 and display points p2' and q2'. Thus, points nearer the center of rotation, which are viewed from an X-ray detector, are visually recognized before a display device, whereas points farther from the center are visually recognized after the display device; therefore they can be recognized three-dimensionally.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an X-ray imaging device, and particularly to a stereo imaging device suitable for angiographic diagnosis.

[Conventional technology]

Stereo imaging is suitable for three-dimensionally visualizing the entire vascular system, which has a three-dimensional structure. Conventional stereo imaging is performed by irradiating X-rays from two different directions and measuring X-ray transmission images. This type of technology is described, for example, in [Practical X-ray Inspection], pages 21.0 to 212 (
It is described in 1981, Magbros Publishing).

[Problem that the invention seeks to solve]

The above conventional technology has the same intensity as synchrotron radiation.
Although it has excellent characteristics such as monochromaticity, it cannot be applied to X-ray beams whose emission direction is fixed.

An object of the present invention is to realize a stereo imaging device with a simple configuration using an X-ray beam with a fixed emission direction.

[Means for solving problems]

The above purpose is to place the subject on a rotating sample stand with a rotation axis perpendicular to the X-ray beam and parallel to the vertical direction of the imaging screen, to take X-ray images at two rotational positions, and to Measure the first image with the rotational position in the counterclockwise position when looking down at the subject, measure the second image with the rotational position in the clockwise position, and measure the first image with the left eye and the second image with the left eye. This can be achieved by observing with the right eye.

[For use]

FIGS. 2A and 2B illustrate the principle of the present invention during photographing and observation, respectively. In Figure 2A, 2
2 indicates the direction of the X-ray beam, and 24 indicates the subject. X
A point P located closer to the rotation center 21 (the axis of rotation is perpendicular to the plane of the paper) when viewed from the line detector 23 is Pl if the rotational position of the sample rotating table is at the above-mentioned "counterclockwise position JPt", or "clockwise position". If it is in JP2, use X-ray detector 2 as P2.
Measured at 3. Similarly, the point Q located far from the rotation center 21 when viewed from the X-ray detector 23 is ql if the rotational position of the sample rotating table is at the above-mentioned "counterclockwise position"Q□;
If it is in the clockwise position JQ2, it is measured as q2.

The image when the material turntable is in the counterclockwise position is the left eye.
If the configuration is such that the image in the clockwise position is observed with the right eye, the above points P and Q connect the left eye 26 of the observer 25 and the left eye display point P1゜ql in FIG. 2B. Straight line and right eye 2
7 and the straight line connecting the right eye display point P2192. I
Each is visually recognized as a QO. In this way, points that are closer to the center of rotation when viewed from the X-ray detector are seen in front of the display device, and points that are far away are seen in the back of the display device, making them visible in three dimensions. .

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 3. In FIG. 1, synchronized synchrotron radiation 1 is made monochromatic by a spectrometer 2 and enters a specimen sample 4 as a parallel beam 3 with an expanded beam size. Transparent X
X-ray image intensifier5. The measurement is performed using an X-ray image detector consisting of an optical shutter 7 consisting of a tandem lens system 6° PLZT element and a television camera 8. The X-ray image data is recorded in the video data acquisition device 9 through analog-to-digital conversion. The pulse motor 1 driver 11 is controlled according to the measurement mode set by the sequence controller 10, and the X-ray shutter 12
2. The spectrometer rotating table 13 and the sample rotating table 14 rotate by a predetermined angle.

First, set the sample rotating table to the "one rotation position counterclockwise" and turn the X for the left eye.
A ray absorption image is measured, and an X-ray absorption image for the right eye is measured at a "clockwise position" rotated clockwise by a predetermined angle.

For stereo display, the image displayed on the display monitor 16 by the stereo display device 15 is divided into four stages: a first field of left eye image, a first field of left eye image, a second field of left eye image, and a second field of right eye image. Interlaced display is performed in a display mode in which the display is a cycle. Stereo viewing is realized by opening the left eye shutter of the stereoscopic glasses 17 while the left eye image is displayed, and by opening the right eye shutter while the right eye image is being displayed.

FIG. 3 shows an example of a measurement sequence using the system of FIG. 1. Based on the vertical synchronization signal of the television camera, the X-ray shutter and the optical shutter are opened every frame, and the electron beam scanning of the television camera is paused during that time. While the shack is closed, first rotate the spectrometer to change the X-ray energy, measure the X-ray absorption image using 45 color X-rays on two scales, then rotate the sample rotating table and repeat the same procedure. Perform the open side. X taken with two types of 1F 1 color X-rays
An energy difference image is obtained by subjecting the line absorption image to image processing including difference calculation using the computer 18. According to this embodiment, it is possible to realize stereo display of energy difference images suitable for selective extraction of blood vessels.

In addition, high-sensitivity blood vessel imaging is possible by taking advantage of the advantage of m-color X-rays obtained from synchro-1-ron synchrotron radiation, which provide images with few scattered rays and high contrast.

〔Effect of the invention〕

According to the present invention, it is possible to realize a stereo imaging device with a simple configuration using an X-ray beam with a fixed emission direction.
This has the effect of increasing the adaptability of X-ray sources that can be used for angiographic diagnosis.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram explaining the principle, and FIG. 3 is a diagram showing a measurement sequence of the embodiment.

Claims (1)

[Claims] An X-ray stereo imaging device is equipped with a rotating sample stage having a rotation axis perpendicular to the X-ray beam and parallel to the vertical direction of the imaging screen, and the rotational position of the rotating sample stage is determined when looking down at the subject. An X-ray stereo imaging device characterized by measuring a right eye image in a counterclockwise position.