JPH01201233A - X-ray diagnostic device - Google Patents

Abstract

PURPOSE:To prepare high resolution X-ray diagnostic information by distributing the output optical image of an image intensifier to the N number of the images of the same number of picture elements as the input picture of a picture distributing device at an image pickup system input side by a picture distributing device, picture-inputting the part having the N number of these pictures with plural image pickup systems and re-constituting an image pickup signal. CONSTITUTION:Four output pictures by dividing one picture element into four are obtained for the optical output image of an image intensifier 2 by a 4-picture output type picture distributing device 10 with an optical fiber line flux and four image pickup systems. Thereafter, these pictures are re-constituted and the same one picture as the number of the picture elements of an original picture is obtained. Thus, without depending on the characteristic improvement of the image pickup system, the high resolution X-ray diagnostic information to satisfy the specification of 2,000X2,000 picture elements or above per one picture required by a digital fluorography picture can be prepared.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Industrial Application Field) The present invention provides an image intensifier (hereinafter referred to as "1.1. In particular, it relates to an X-ray diagnostic apparatus that converts the optical image into an optical image using a television camera (hereinafter referred to as "TV left camera") as an imaging system and displays the image in %. The present invention relates to an X-ray diagnostic apparatus that can obtain high-resolution X-ray diagnostic information without improving the characteristics of an imaging system.

(Prior Art) The configuration of this type of X-ray diagnostic apparatus will be explained with reference to FIG. That is, the X-ray images 't-1, 1, 2 emitted from the X-ray source 1 and transmitted through the subject P't-1 are converted into optical images and output. After passing through the optical system 3, this optical image is input as an image by the TV left camera, and after passing through the amplifier 5, the video signal is converted into a digital signal by the A/1) conversion unit 6, and then by the video signal processing unit 7. D/A after appropriate signal processing
The converter 8 converts the signal into an analog signal, and the monitor 9 displays it as an image on a TV screen.

(Problems to be Solved by the Invention) Such an X-ray diagnostic apparatus is used exclusively as a fluoroscopic image because it does not satisfy the resolution required for the above-mentioned TV image diagnosis image, and the captured image is an X-ray image. The current situation is to use films and the like.

However, with recent advances in video technology and digital signal processing, as well as the advent of CCD image sensors that can be expected to have a high number of pixels as well as image pickup tubes as image sensors for TV cameras, it is possible to obtain both TV and TV images. in the direction. Especially considering the application in DF (digital fluorography), current image pickup tubes have 1oooxiooo pixels per image, and CCD image sensors that can be expected to have a high number of pixels currently only have about 1000 pixels per image. Both images do not satisfy the required specification of 2000 x 2000 pixels or more per image, and there is a problem that a satisfactory X-ray diagnostic image cannot be obtained only by improving the characteristics of the imaging system.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an X-ray diagnostic apparatus that can obtain high-resolution X-ray diagnostic information without improving the characteristics of an imaging system.

[Structure of the Invention] (Means for Solving the Problems) The present invention has a structure in which the following measures are taken to solve the above problems and achieve the object. That is, in the X-ray diagnostic apparatus according to the present invention, one end surface of N optical fiber bundles is made to correspond to one end surface of N optical fiber bundles per pixel for all pixels of an input image in one image input section, and The optical fiber bundle is divided into N pieces in the X direction or Y direction of the image guide, and the other end faces are divided into N pieces.
An image distribution device having multiple image output units is provided such that one image input unit thereof faces the optical image output unit of the image intensity 7 eye, and the image appearing on the plurality of image output units is divided respectively. The present invention is characterized in that a plurality of imaging systems are provided to take images, and the imaging signals from the plurality of imaging systems are reconstructed.

(Function) According to this configuration, the output optical image of the image intensity 7 eye is distributed by the image distribution device into N images having the same number of pixels as the input image of the image distribution device on the input side of the imaging system. By inputting different parts of these N images using a plurality of imaging systems and reconstructing the imaging signal, high-resolution X-ray diagnostic information can be generated.

(Embodiment) An embodiment of the X-ray diagnostic apparatus according to the present invention will be described below with reference to FIG.

As shown in FIG. 1, the X-ray image g1.1.2 emitted from the X-ray source 1 and transmitted through the subject P is converted into an optical image and output.

The output optical image of 1.1.2 is input to the image input section 10k of the 4-image output type image distribution device 10 arranged such that one image input section faces the output section of 1.1.2, The four output sections output images having the same number of pixels as the input section image. Then, there are four output units (10B, .

JOB,, JOB3. The image from JOB, ) is the image of four optical systems J (Ja,,?b, Jc, Jd)! Four image sensors 4 (4a T 4 b * 4 e
+4d), and then each video signal is passed through four amplifiers 5 (5m, 5b, 5c, 5d) to four A/D converters 6 (6h+6b, 6e).

6d) is converted into a digital signal and reconstructed as a single image by the reconstruction unit 11. This reconstructed image is subjected to appropriate signal processing in the Eirin signal processing unit 7, and then sent to the D/A conversion unit 8.
The signal is converted into an analog signal and displayed on the monitor section 9 as an image on a television set.

The detailed structure and operation of the above structure will be explained. That is, first, the image distribution device 10 will be explained with reference to FIGS. 2 and 3. As shown in FIG. 2 (&), it is an optical fiber band 20 in which original fiber bundles having minute diameters are closely arranged in parallel in the radial direction, one end 20A is common and the other end 20B, , 20B are two. Separately, they are stacked one after the other to form two types of end faces, and one common end is used as an image input part 21, and the two other end faces are used as two image output parts 22, 23, and two images are formed. An output type image distribution device 24 is configured.

As shown in FIG. 2(b), when the image input section 21 of the two-image output type image distribution device 24 is placed so as to face the original image 25 in which the model image T appears, the image output section 22.2
3, distribution images T' and T' corresponding to the model image T appear.

FIG. 3 shows a four-image output type image distributing device 10 used in this embodiment. Optical fiber bundles having micro diameters compared to the size of one pixel of the output image of the tensifier are arranged closely in the radial direction to form a nine-element fiber band, with one end being common and the other end divided into four. They are stacked one after the other to form end faces of 4 systems, etc., one common end is used as an image input part JOA, and the end faces of the four other ends are used as four image output parts 10B1.10B1.10BB + 10.
84.

As shown in FIG. 3(b), in the 4-image output type image distribution device 10, for example, 1.1
．． This means that one pixel of the output optical image of No. 2 corresponds to the 16 original fiber bundles indicated by diagonal lines in the figure.

One pixel is divided into four rows of 7-eye bands in the Y direction shown in the figure, and the divided bands of each row are assembled to form four image output units 10m, 10b, 10c, and 10d. It becomes.

In the configuration example shown in Fig. 3, the input image (the number of pixels is 2
000X2000) Optical fiber bundle 2000X 80
00, and the optical fiber bundle 200 is input with four image output units.
With 0x2000, it becomes possible to output an output image with a pixel count of 2000x2000.

As shown in FIG. 4, an image is input to the upper left half of the image output section 10B1 by the optical i3m+imaging device 4a, and the upper right half of the image output section 10B has an optical diameter Jb.

An image is inputted by the image sensor 4b, the lower left half of the image output section 10B is inputted by the image sensor 4C, which has an optical diameter 3c, and the lower right half of the image output section 10B is inputted by the image sensor 4d, which has an optical diameter Jd. The video signals are inputted to the A/D converter 6* after passing through amplifiers 5@, 5b, 5c+5d.
+6br6ee6d converts it into a digital signal and sends it to the reconstruction unit 1.
1 is reconstructed as one image, and this reconstructed image is guided to the Eirin signal processing section 7.

As described above, according to this embodiment, the four-image output type image distribution device 10 using an optical fiber bundle and the four imaging systems provide 1. (2) One pixel of the optical output image in step 2 was divided into four to obtain four output images, and then these images were reconstructed to obtain one image with the same number of pixels as the original image. DF without improving the characteristics of the imaging system.
It is possible to obtain an X-ray diagnostic image that satisfies the required specification of 2000×2000 pixels or more per image for both images.

In addition, since a plurality of optical fiber bundles are associated with one pixel and a single continuous original fiber bundle (band) is used, the image distribution device is easy to manufacture and can be combined with optical fiber bundles. Alignment with the original image can be easily performed.

In the above, an example was explained in which four output images are obtained and these are reconstructed. However, it is also possible to obtain N output images of 5 or more and convert them into one image corresponding to the original image and with an increased number of pixels. It can also be reconfigured.

In this case, similarly to the configuration examples shown in FIGS. 2 and 3, the original fiber band is made up of optical fiber bundles having minute diameters arranged closely in parallel in the radial direction, with one end being common and the other end being N pieces. Separately stacked one after the other to form N-type end faces, etc., one common end is used as an image input part, the other end faces of N pieces are used as N image output parts, and N image output type image A distribution device is configured, an imaging system is configured corresponding to the N output images, and reconstruction is performed.

In addition, various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, in the present invention, one end face of N original fiber bundles is made to correspond to one end face of N original fiber bundles per pixel for the entire input image in one image input unit, and a plurality of original 7 The optical fiber bundle is divided into N pieces in the X direction or Y direction of the image guide consisting of a bundle of optical fibers, and the other end faces are divided into N pieces.
an image distribution device having a plurality of image output units is provided such that one image input unit thereof faces an optical image output unit of the image intensifier, and the images appearing on the plurality of image output units are respectively divided and imaged. As a result, the output optical image of the image intensifier is transmitted to the input side of the image distribution device by the image distribution device. The image is divided into N images with the same number of pixels as the input image of Diagnostic information can be generated.

Therefore, according to the present invention, it is possible to obtain high-resolution X-ray diagnostic information without improving the characteristics of the imaging system.
A radiation diagnostic device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of an X-ray diagnostic apparatus according to the present invention, FIGS. 2 and 3 are diagrams explaining the principle and operation of an image distribution device used in the same embodiment, and FIG. 5 is a diagram illustrating image reconstruction in the same embodiment, and FIG. 5 is a diagram illustrating a conventional example. 1... X-ray source, 2...1.1. ．． 3...Optical system,
4... Image pickup element, 5... Amplifier, 6... A/D conversion section, 7... Video signal processing section, 8... D/A conversion section, 9... Monitor section, 10 ... 4 image output type image distribution device, 11... reconstruction unit.

Claims (1)

[Claims] In an X-ray diagnostic apparatus equipped with an X-ray source, an image intensifier, and an imaging system, one end surface of N optical fiber bundles is made to correspond to all pixels of an input image in one image input unit, and An image distributing device that divides an image guide made of a plurality of optical fiber bundles into N pieces in the X direction or Y direction with the optical fiber bundle as a unit, and uses the other end faces as N image output units, is used to generate one image. The input section is provided so as to face the optical image output section of the image intensifier, and a plurality of imaging systems are provided to separately capture images appearing on the plurality of image output sections, and imaging by the plurality of imaging systems is provided. An X-ray diagnostic apparatus characterized in that high-resolution X-ray diagnostic information is obtained by reconstructing signals.