JPH04259454A - X-ray ct device - Google Patents

Abstract

PURPOSE:To enhance the accuracy of decision of tomogram position by displaying fluoroscopic images in such a manner as being visible in three- dimension, which are used in deciding the position of each tomogram when photographing tomograms. CONSTITUTION:A scanner main body 1 is set at positions of different angles corresponding to the parallex of a subject 3 and each X-ray fluoroscopic image 6 is originated to obtain two three-dimensional original images 6a, 6b and means are provided for displaying the images in parallel on an image display monitor 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray CT apparatus capable of stereoscopically viewing created X-ray fluoroscopic images.

0002

[Prior Art] Conventionally, when taking a tomographic image of the abdomen etc. with an X-ray CT device, an X-ray fluoroscopic image (scanogram) is first created, and this is displayed on an image display monitor and referenced to determine the tomographic position. Was.

0003

[Problems to be Solved by the Invention] In conventional X-ray CT devices, the created and displayed X-ray fluoroscopic images are simply flat images with no visual sense of depth. There was a problem that the decisions could be inaccurate.

[0004] An object of the present invention is to provide an X-ray CT apparatus in which created X-ray fluoroscopic images are displayed in a stereoscopic manner, and the tomographic position can be more accurately determined when taking a tomographic image. There is a particular thing.

[0005]

[Means for solving the problem] The above purpose is to sequentially position the scanner body at positions having an angular difference corresponding to left and right parallax with respect to the subject, create X-ray fluoroscopic images for each, and obtain two three-dimensional original images. This is achieved by providing a three-dimensional original image creating means and a parallel display means for displaying two three-dimensional original images obtained by the three-dimensional original image photographing means side by side on an image display monitor so that they can be viewed stereoscopically.

[0006]

[Operation] The three-dimensional original image creation means sequentially positions the scanner body at positions having an angular difference corresponding to left and right parallax, for example, an angular difference of about 5 degrees, with respect to the subject, and creates X-ray fluoroscopic images for each. Obtain two three-dimensional original drawings. The parallel display means displays these two stereoscopic original images in parallel on the image display monitor so that they can be viewed stereoscopically.

[0007] As a result, the generated X-ray fluoroscopic image can be viewed stereoscopically, and the tomographic position can be determined more accurately when a tomographic image is taken.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an X-ray CT apparatus according to the present invention. In this Figure 1, 1 is a scanner body, an X-ray tube 1a, and an opening 1 in this X-ray tube 1a.
The X-ray detector 1c is arranged opposite to the X-ray tube 1a through the X-ray tube 1a and rotates integrally with the X-ray tube 1a.

Reference numeral 2 designates a bed that can move forward and backward relative to the opening 1b of the scanner body 1, and 3 represents a subject to be placed on the bed 2.

Reference numeral 4 denotes an image processing device that creates an X-ray fluoroscopic image (scanogram) or an X-ray tomographic image, which will be described later, based on the measurement data from the X-ray detector 1c.

According to the present invention, the image processing device 4 is constructed by adding three-dimensional original image creating means 4a and parallel display means 4b to the conventional configuration. In this case, the stereoscopic original image photographing means 4a has an angular difference corresponding to left and right parallax with respect to the subject 3;
Here, the scanner body 1 is sequentially positioned at positions having an angular difference of about 5 degrees, and X-ray fluoroscopic images are created for each to obtain two three-dimensional original images. Further, the parallel display means 4b is
Two three-dimensional original images obtained by the three-dimensional original image photographing means 4a are displayed in parallel on an image display monitor to be described later so that they can be viewed stereoscopically. (Regarding stereoscopic imaging, refer to "Medical Radiation Equipment Handbook," April 20, 1985, published by Denshi Keizoku Publishing Co., Ltd., pages 124 to 125.) 5 indicates the X-rays created by this image processing device 4. This is an image display monitor that displays fluoroscopic images (scanograms), X-ray tomographic images, etc.

Reference numeral 6 indicates an image displayed on this image display monitor 5, and here, the above two three-dimensional original images (scanogram) 6 are shown.
This shows an example where a and 6b are displayed side by side on the left and right so that they can be viewed stereoscopically.

[0014] Next, the operation will be explained. Since there is no particular difference in the operation of normal scanogram imaging or tomographic imaging from that of conventional equipment, we will explain here by obtaining two stereoscopic original images and paralleling them so that they can be viewed stereoscopically. The operation when displaying will be explained.

The three-dimensional original image creating means 4a of the image processing device 4 first emits an X-ray beam 7 while the X-ray tube 1a is at position A in FIG. As a result, the X-ray beam 7 passes through the subject 3 and enters the X-ray detector c, but at this time, the bed 2 moves in a direction perpendicular to the display surface in FIG. Therefore, the measurement data obtained by the X-ray detector 4 has a two-dimensional spread, and is created in the image processing device 4 as an X-ray fluoroscopic image (scanogram) with a two-dimensional spread. . This X-ray fluoroscopic image (scanogram) is displayed on the left half side of the image display monitor 5 as a three-dimensional original image 6a by the parallel display means 4b.

Next, the three-dimensional original image creating means 4a returns the bed 2 to the original movement start position and moves it to the X position as shown at position B in FIG.
The scanner body 1 is rotated and positioned so that the wire tube 1a is at a position with an angular difference θ of about 5 degrees corresponding to left and right parallax with respect to the subject 3. Then, an X-ray fluoroscopic image (scanogram) is created in the same manner as described above. This X-ray fluoroscopic image (
The scanogram) is displayed on the right half side of the image display monitor 5 as a three-dimensional original image 6b by the parallel display means 4b.

As a result of the above, the two stereoscopic original images 6a and 6b are displayed in parallel on the image display monitor 5 in a stereoscopic manner, and the normal stereoscopic photograph observation method (see the above-mentioned ``Medical Radiology Equipment Handbook''). can be viewed in 3D.

[0018] In the above-mentioned embodiment, a case was described in which the other stereoscopic original (scanogram) is created after the creation of one stereoscopic original (scanogram) is completed, but one stereoscopic original and the other stereoscopic original are partially They may be created alternately.

That is, to create a three-dimensional original image (scanogram), while emitting the X-ray beam 7 to the subject 3,
Each time the bed 2 is moved and positioned a certain distance, the scanner body 1 is rotated and positioned, and the X-ray beam 7 is emitted to the subject 3. alternately create partial scanograms). By repeating this over the entire desired movement distance of the bed 2, two three-dimensional original images may be created, and in this case, two three-dimensional original images are created almost simultaneously.

Further, the display on the image display monitor 5 may be performed after the creation of the two three-dimensional original images (scanograms) is completed.

[0021]

Effects of the Invention As explained above, according to the present invention, the scanner body is sequentially positioned at positions having an angular difference corresponding to the left and right parallax with respect to the subject, and X-ray fluoroscopic images are created for each of the two 3D images. By obtaining the original image and displaying these two 3D original images side by side on an image display monitor so that they can be viewed in 3D, the X-ray fluoroscopic image can be viewed in 3D using the normal 3D photography observation method, which is useful when taking tomographic images. This has the effect that the fault position can be determined more accurately.

[Brief explanation of the drawing]

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

[Explanation of symbols]

1 Scanner body 1a X-ray tube 1b Opening 1c X-ray detector 2 Bed 3. Subject 4 Image processing device 4a　　　3D original drawing creation means 4b Parallel display means 5 Image display monitor

Claims (1)

[Claims] Claim 1: The scanner body is sequentially positioned at positions having an angular difference corresponding to left and right parallax with respect to the subject, and each
It is equipped with a three-dimensional original image creation means for creating two three-dimensional original images by creating a line perspective image, and a parallel display means for displaying the two three-dimensional original images obtained by the three-dimensional original image photographing means side by side on an image display monitor so that they can be viewed stereoscopically. An X-ray CT device characterized by: