JPS58207038A - Device for processing image by radiant ray - Google Patents

Abstract

PURPOSE:To provide both functions of fluoroscopy and photographing and space and density resolutions which are more effective than the film photographing, by commonly making operational processing on electric signals from a fluoroscopy apparatus and latent image recording device. CONSTITUTION:In the case of fluoroscopy, an image obtained by transmiting the X-ray of an X-ray tube 201 through an object 202 enters into an image intensifier 203 and is picked up by a TV camera 205 through a lens system 204. Then the image is displayed on a display 207 after it is processed by a digital signal processing system 206 and stored in a file for fluoroscopy 208 if required. In the case of photographing, an imaging plate 210 of a high sensitivity and a high resolution is put in front of the intensifier 203 by sliding. After a latent image by the X-ray is formed, the imaging plate 210 returns to the original position and scanned by a laser light 211. The scanned image is converted into electric signals and processed at the processing system 206, and then, stored in a file for photographing 213. Since a high sensitivity imaging plate is used, the difference in the radiation quantity between the fluoroscopy and photographing is small and, therefore, one set of X-ray tube can be used for both fluoroscopy and photographing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides radiation 1fslIli11#! The present invention relates to processing devices, particularly digital radiation image processing devices.

Why, f of the patient's X-ray image! From the M festival method rc onwards, there are methods of type 2a, fluoroscopy and photography. Fluoroscopy is a method in which, for example, you drink a radioactive substance such as barium and observe how the barium flows through the esophageal wall to discover the presence or absence of foreign objects in the esophageal wall. A device that combines the following is used. The disadvantage of this method is the relatively poor spatial resolution (10-20 line bears/cm). Photography is a method in which the X-rays that have passed through the patient are received by a film and the film is developed.The spatial resolution is relatively good (60 to 80 line bears/cm2), but there are problems with film storage space and the use of film. Problems such as the consumption of violets are arising. Also (Ik anonymous resolution is not good.

Devices are already known that are capable of digitally processing images to compensate for the drawbacks of film during imaging and further reduce the exposure dose. As shown in FIG. 1(A), this device first consists of a highly sensitive imaging plate 103? ]l
- to record an X-ray image of the subject 102 by X-rays emitted from X-ray #101 as an image. Next, as shown in Figure 1 CB), after moving the imaging plate to another location, irradiation with a laser 1104t is performed to
A fluorescent light 105 comparable to L is generated, and the fluorescent light 105 is
Guide to Photomaru 107 with e7 fiber 106, #I
After that, the digital processing system 108 performs digital processing. However, in this system, the scanning time by the laser beam 104 is long;
Since fluoroscopy is not possible, it is necessary to use another device for fluoroscopy.

On the other hand, with conventional fluoroscopic equipment, it is possible to make a hard copy of one screen at the moment when the subject appears, but the resulting image is far inferior to the spatial resolution of X-ray film, and in the end,
It was necessary to use a photographic device that used a good film klffi with a width of 4 mb.

- Also, in the combination of a conventional film TK tsuda imaging device and a low-cost fluoroscopic device, the X-ray source used is thicker (as described below), so it is possible to combine the X-ray t of two WJ units. This is VC, and the resolution in the case of photography is also not good, so we cannot expect much benefit.For example, the X-ray lid, which is necessary to underestimate a single photograph, is more than IV/togen,
Is it necessary to momentarily send a large current through the X-ray tube? For C,
In fluoroscopy, continuous Xm or continuous pulse X edge is used, ll
The 4k per A is less than that of Lundgen, and there is no need to instantaneously flow a large current, but it is characterized by the long time it takes to emit X-rays.

In the conventional method, it is necessary to have two devices for imaging and fluoroscopy, which results in high costs and requires a large installation space. In addition, there was a significant amount of time lost due to the movement of patients.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of conventional devices, to perform both fluoroscopy and photography with a single device, and to provide a spatial resolution higher than that of film in photography.

The object of the present invention is to provide a device capable of achieving high concentration resolution.

In order to achieve the above object, the present invention is characterized by comprising a fluoroscopic device and a latent image recording device, and in which electrical signals from the fluoroscopic device and the latent image recording device are commonly subjected to arithmetic processing.

Hereinafter, one embodiment of the present invention will be described with reference to FIG. 2. When performing fluoroscopy, the X-rays emitted from X-ray '1201 are
The image after passing through 02 first enters an image intensifier 203 and is imaged by a television camera 205 through a lens system 204. Thereafter, the signal is processed by a digital signal processing system 206, displayed on a display device 207, and stored in a file 208 for viewing on an optical disk or the like if necessary. Using a TV camera with 1024 scanning lines and a high-performance image intensifier, the spatial resolution is 0.5 mm, the armpit resolution is 8 to 9 bits, and the image transfer rate is 1 second. You can expect about 930 images.

Next, in the case of photography, the high-sensitivity M
The functional imaging plate 21O is slid in front of the image intensifier 7 fire 203 as shown by the arrow. After the latent image is formed by the X-rays, the imaging plate 210 returns to the position before sliding, and the laser beam 211 captures υ? m1jI is read,
゛Converted into an electrical signal. This electricity number 1 is processed by a digital IN number processing device 206 and stored in a photographing file 213 such as an optical disc. After that, 1p and bart:f are displayed on the display device 207 as necessary.
The hard copy of the file, etc. is sent to the f heat storage ff 212.

Since an imaging plate with high sensitivity is used, the difference in dose between imaging and fluoroscopy is smaller than before, making it relatively easy to use one X-ray camera for both fluoroscopy and imaging, making it easier to use X# tube. Voltage, 1st stream is digital image 1 station processing device fi
A control unit in 206 allows switching between viewing, fluoroscopy, and imaging.

The above imaging system can be expected to have a spatial resolution of about 0.1, a density resolution of 8 to 10 in focus, and an imaging time of about 50 to 100 InS.

In addition, when performing fluoroscopy, image intensity 7 fire 2
If you install a slit in front of 03, the influence of defeated trout will be less, and you will be able to obtain an image with better WI performance.

Furthermore, in the apparatus according to the present invention, mutual calculations (for example, calculation of differences between images) between the fluoroscopic image stored in the fluoroscopy file 208 and the photographed image stored in the photographing file 213 are performed using a digital 1IIlli# processing device. Step 206: - Create a display device 2 and create a display device 2.
It can be displayed on 07.

According to the present invention, one device can perform both the functions of fluoroscopy device and imaging device M.
1) Only one X-ray source, patient bed, etc. is required, which saves cost and time.

2) There is no need to move the patient, which saves time.

3) By inserting the imaging plate in front of the image/tensifier, high-resolution static 11-speed data can be recorded at the time of the pressure of Toshokushin.

4) A new image can be created by performing mutual calculation between a perspective image and a photographed image.

You can enjoy effects such as:

[Brief explanation of drawings]

Figures 1 (Al and (B) are bronch diagrams of the conventional radiation channel processing device, and Figure 2 is an actual diagram of the radiation channel processing device according to the present invention. 102.210...Imaging plate, 2
03...Image intensifier, 104°21
1...Laser light, 108,206...Digital image one-image processing device. Part II￥] Continuation of page 1 of 2 B 0 Inventor: Hideki Kono, Hitachi, Ltd. Central Research Laboratory, 1-280 Higashi Koigakubo, Kokubunji City, 0 Inventor: Hitachi Medeico Research Co., Ltd., 2-2-2 Shinjuyo, Takarou, Education, City Inside the Development Center @Applicant Hitachi Medical Co., Ltd. 1-14 Uchikanda-chome, Chiyoda-ku, Tokyo

Claims (1)

[Claims] A radiation image processing device comprising an X-ray source, a radiation-resistant imaging device that receives X-rays from the X-ray source, and a device that digitally processes electrical signals from the radiation foot imaging device, the radiation image processing device comprising: The radiographic imaging device is a real-time image display device, as well as the real-time imaging device described above.
A radiation image processing device comprising a latent image recording device disposed as necessary between an image display device and a subject, and a tif&: reading device of the latent image recording device.