JPH0625097Y2 - X-ray TV device - Google Patents

Description

Detailed Description of the Invention A. TECHNICAL FIELD The present invention relates to an X-ray television apparatus.

B. 2. Description of the Related Art In an X-ray image diagnostic apparatus using an X-ray television, an X-ray image captured in an image memory during X-ray irradiation can be displayed on a television monitor even when X-rays are not emitted.

This function eliminates unnecessary X-ray exposure,
The diagnostic accuracy can be improved.

C. However, since the X-ray image is displayed on the TV monitor even when the X-ray is not irradiated, it is not possible to know whether or not the X-ray is irradiated only by looking at the TV monitor.

For this reason, there is a risk of misunderstanding that X-rays have not been emitted even when X-rays are being emitted, resulting in excessive exposure.

D. Means for Solving the Problem An X-ray generated by an X-ray generator is radiated, and an X-ray fluoroscopic image transmitted through a subject is stored in an image memory.
In an X-ray television device configured to display on a television monitor until the next X-ray irradiation, an image addition circuit connected between the image memory and the television monitor, and an image addition circuit connected to the image addition circuit, A message signal generating circuit for outputting a display signal notifying that the X connection is being irradiated, and detecting that the X-ray generator has generated X-rays and adding the fluoroscopic image signal and the display signal. And an X-ray irradiation detection circuit that outputs a command signal.

E. When the X-ray generator informs the interface of the X-ray television apparatus that the X-ray irradiation is being performed, the X-ray television apparatus displays a message indicating that the X-ray irradiation is being performed on the television monitor together with the X-ray fluoroscopic image. .

F. Embodiment Hereinafter, an embodiment of the present invention will be described based on an embodiment shown in the drawings. In FIG. 1, the subject M is irradiated with X-rays from an X-ray tube 2 connected to a high voltage generator 1. Then, the X-ray fluoroscopic image at the time of X-ray irradiation is stored in the image memory 6 via the image intensifier 3, the X-ray television camera 4, and the A / D converter 5. This stored image is D
It is displayed on the television monitor 8 via the / A converter 7 until the next X-ray irradiation. 9 is an X-ray generation switch.
Now, here, an image adding circuit 11 is connected between the image memory 6 and the D / A converter 7. The message signal generating circuit 12 is connected to the image adding circuit and outputs a display signal notifying that the X connection is being irradiated.

An X-ray irradiation detection circuit 13 is connected between the X-ray generator 1 and the image addition circuit 11, detects that the X-ray generator 1 has generated X-rays, and detects the fluoroscopic image signal and the display. A command signal is output to add the signal. Further, the X-ray irradiation detection circuit 13 includes an X-ray tube voltage measurement circuit 13a for detecting the X-ray generation voltage of the X-ray generator 1, a voltage setter 13b for determining a reference value of the X-ray generation voltage, and If the signal is larger than the set value, the command signal is output to the adding circuit 11.

The image writing switch 14 includes the A / D converter 5 and the image memory 6.
And a signal from it is connected to the image addition circuit 11.

Next, the operating state is shown. When the X-ray generation switch 9 is turned on, the X-ray tube 2 irradiates the subject M with X-rays. The X-rays that have passed through the subject M are I.I. I. 3 is converted into light, and further converted into a video signal by the X-ray television camera 4. This video signal is digitized by the A / D converter 5 and stored in the image memory 6.

If the X-ray is being irradiated now, a signal indicating that the X-ray is being irradiated is input from the X-ray generator 1 to the image addition circuit 11 via the X-ray irradiation detection circuit 13. When this signal is input, the message image generated by the message image generation circuit 12 and the X-ray fluoroscopic image output from the image memory 6 are superimposed and output to the television monitor 8 via the D / A converter 7. To do. Figure 2 shows the situation.

When the X-ray irradiation is stopped, the image memory 6 outputs the X-ray image stored during the X-ray irradiation to the image addition circuit 11. The image addition circuit 11 knows that the X-ray irradiation has stopped via the X-ray irradiation detection circuit 13, and the message image generation circuit 12
The X-ray image alone is output to the television monitor 8 via the D / A converter 7 without synthesizing the message image generated by.

The X-ray irradiation detection circuit 13 is used in the TV camera 4
Connected to the camera controller and frame setting device of
The signal may be retrieved from there.

The present invention is not limited to the embodiments and embodiments described above, and includes various modifications without departing from the spirit and scope of the utility model registration request.

G. Effect of the Invention Even if an X-ray image is constantly displayed on the TV monitor regardless of whether or not X-ray irradiation is performed, it is possible to know whether or not X-ray irradiation is performed by looking at the TV monitor, thereby eliminating the risk of accidental exposure.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a television monitor. 1 ... X-ray generator, 2 ... X-ray tube, 3 ... I. I, 4 ... X-ray T
V camera, 5 ... A / D converter, 6 ... Image memory, 7 ... D
/ A converter, 8 ... Television monitor, 9 ... X-ray generation switch, 11 ... Image addition circuit, 12 ... Message image generation circuit, 13 ... X-ray irradiation detection circuit, 13a ... X-ray tube voltage measurement circuit, 13b ... X Wire tube voltage setting device, 13c ... Comparison circuit 14 ... Image writing switch

Claims (1)

[Scope of utility model registration request] 1. An X-ray fluoroscopic image radiated by an X-ray generator and transmitted through an object is stored in an image memory, and the stored image is displayed on a television monitor before the next X-ray irradiation. In the X-ray television device configured to display, an image addition circuit connected between the image memory and the television monitor, and a display signal connected to the image addition circuit and notifying that X connection irradiation is being performed. An output message signal generation circuit and an X-ray irradiation detection circuit that detects that the X-ray generator has generated X-rays and outputs a command signal to add the fluoroscopic image signal and the display signal. An X-ray television set characterized by including.