JPH02195943A - X-ray stereo-photographing device - Google Patents

Abstract

PURPOSE:To obtain an X-ray stereo-photographing device which can three- dimensionally view the blood vessel running state on a TV monitor by providing a spectacle controller observing the right and left field images in turn with stereoscopic spectacles. CONSTITUTION:A DSA device 10 is utilized as a digital memory device, and the DSA device 10 outputs the X-ray exposure pulse signal to an X-ray device 12. A stereo-controller 14 distributes the exposure signal to the right focal point exposure and the left focal point exposure of a stereo-focal point tubular bulb 16. X-rays radiated from right and left focal points permeate a person under test 18, and its X-ray permeation image is converted into a visible image by an image intensifier 20 and read out by a TV camera 22. The scanning timing of the TV camera 22 is sent by a synchronization signal generator incorporated in the DSA device 10 via a CCU 24. X-ray images from the right and left focal points of an X-ray tube are displayed on a TV monitor 26 in turn timewise, and they are stereoscopically observed through shuttered spectacles.

Description

[Detailed description of the invention] [Industrial application field] This invention is utilized in the field of X-ray photography.

The present invention relates to an X-ray stereo imaging apparatus, and more particularly to a novel X-ray digital image stereo imaging useful for image diagnosis.

[Prior Art] Conventionally, the running state of blood vessels, the position of a catheter, etc. in angiography examinations have been determined from simple projection images in X-ray fluoroscopy, or from two images obtained by two-way fluoroscopy with 90° different projection directions.

[Problems to be Solved by the Invention] In these images, blood vessels running in a complicated manner are projected overlappingly, making it difficult to simply grasp the blood vessel running.

Therefore, an X-ray image diagnostic device that can provide stereoscopic vision was proposed, and a cine-stereo imaging method using cine film is known, but since it uses film, it requires complicated operations for recording and playback, so it was not practical. .

An object of the present invention is to provide an X-ray stereo imaging device that allows stereoscopic visualization of blood vessel running conditions on a TV monitor without requiring special skills or anatomical knowledge on the part of the observer.

[Means for Solving the Problems] The above object is to configure an X-ray system using a stereo focus X-ray tube and a digital memory device, and to generate images on a TV camera by emitting X-rays from each of the right and left focal points of the X-ray tube. A means for scanning and imaging in an interlaced mode, and storing each odd and even field scanned image taken by right and left focal point X-ray exposure in the memory of the digital subtraction device, This is achieved by providing a means for reading field images and displaying them on a TV monitor in synchronization with a TV camera, and a glasses controller for alternately observing right and left field images using stereoscopic glasses.

[Operations] In recent angiographic examinations, system configurations using X-ray digital subtraction techniques have become widespread.

By utilizing the functions of this digital subtraction angiography device (DSA device), stereo imaging or stereoscopic fluoroscopy becomes possible very easily.

Note that a digital memory device can be used instead of the DSA device, and in both cases, the TV camera and TV monitor are operated in an interlace mode, that is, frame images of the right and left focal images are stored in the digital memory. Only the respective same field images are read out and displayed on a TV monitor, and observed using stereoscopic glasses.

(Embodiments) Preferred embodiments of the present invention will be explained based on the drawings.

FIG. 1 is a configuration block diagram showing one embodiment thereof,
An example is shown in which the DSA device is used as a digital memory device within the device.

In this drawing, reference numeral 12 denotes an X-ray device or an X-ray high voltage device, which is composed of an X-ray high voltage generator and an X-ray controller. 14 is a stereo controller for the stereo focal X-ray tube 16, 118 is a subject, 20 is an X-ray image intensifier (1, 1,), 22 is a TV camera, and 24 is a TV camera control unit (CCU).
), 26 is T monitor, 28 is glasses controller, 3
0 is glasses.

The DSA device 10 sends an X-ray exposure pulse signal (
R-EXP, L-EXP).

The stereo controller 14 distributes this exposure signal to the right focus exposure and left focus exposure of the stereo focus tube 16.
The X-rays emitted from the right and left focal points pass through the subject 18, and the X-ray transmitted image is transmitted through the image intensifier (1,
1, ) 20 into a visible image, which is read by a TV camera 22.

The scanning timing (Vsync) of this TV camera 22 is also controlled by the CCU 2 using a synchronization signal generator built into the DSA device.
Sent via 4.

On the TV monitor 26, X-ray images from the right and left focal points of the X-ray tube are displayed alternately in time. This is observed stereoscopically through glasses 30 with shutters (or glasses using polarized light).

FIG. 2 is a time chart showing an example of the operation of the main parts of the apparatus.

The TV camera 22 is a standard type 525 cameras/60H.
2/Interlace mode is set.

The synchronization signal (Vsync) every 1/30 seconds is
2. Via the stereo controller 14, the X-ray pulses are changed into X-ray pulses R1, R2...Ll, L2... as right and left focus X-ray exposure signals (R-EXP, L-EXP).

The TV camera 22 receives R1-odd by the X-ray pulse R1.
The image (odd field image) and the R1-EVEN image (even field image) are read, and then the pulse L1 is further imaged sequentially as pulses R2 and L2.

The same image is stored in the memory within the DSA device 10 via an A/D converter (not shown).

The contents of this memory are as shown in the monitor display line shown in the figure.
In the interlace mode, for example, an R-odd image is displayed during the odd scanning period, and an L-odd image is displayed during the even scanning period, and the opening and closing of the glasses controller or the glasses shutter 30 is controlled in synchronization with this display.

In this way, the TV camera 22 and TV monitor 26 operate in the current standard mode, and the DSA device 10 can easily create stereo images by simply rearranging the images to be displayed using the built-in digital memory and performing D/A conversion. can get. Furthermore, although there is a two-frame delay as in the illustrated example, real-time display is achieved.

According to the embodiment described above, although the time between R and L in X-ray exposure is 1/30 seconds, the time between R and L on the display screen is 1/60 seconds, and flickering is extremely reduced.

However, the number of scanning lines is 1/2, 262.
There will be 5 pieces.

Incidentally, since the number of TV vertical scanning lines determines the vertical resolution, in the above-mentioned embodiment, the resolution is assumed to be 1/2 that of a normal television. To avoid this, the TV camera should be 525/30H.
z Non-interlaced scanning, R in 1/30 seconds
image or L image and the other 1050 lines/60 Hz
TV monitor in interlace mode (double speed monitor)
If you use
It can also be displayed every /60 seconds, and an example of operation in this case is shown in FIG.

[Effects] Although a switching device (shutter glasses, etc.) is required to view the right and left images separately, a regular angiography examination system can be used, and stereoscopic real-time or moving images can be easily obtained. This makes it very easy to understand blood vessels.

Stereo fluoroscopy and stereo imaging using a TI-TV system are possible, and digital cine-stereo imaging can also be performed.

[Brief explanation of the drawing]

FIG. 1 is a configuration block diagram showing one embodiment of the present invention,
FIG. 2 is a time chart showing an example of operation according to the present invention, and FIG. 3 is a time chart showing another example of operation. Patent Applicant Shimadzu Corporation Representative Patent Attorney Ike 1) Sadao・Huo Figure 1 Figure 3 5 ync Figure 2 Almost Qsec. interlace

Claims (1)

[Claims] 1. It consists of an X-ray system using a stereo focal X-ray tube and a digital memory device, and means for scanning and imaging a TV camera in an interlace mode by emitting X-rays from each focal point on the right and left sides of the X-ray tube, and The respective odd and even field scanned images captured by focal X-ray irradiation are stored in the memory of the digital subtraction device, and the same field images are read out from each of the right and left focal frame images.
An X-ray stereo imaging device characterized by comprising means for displaying on a TV monitor in synchronization with a V camera, and a glasses controller for alternately observing right and left field images using stereoscopic glasses.