JPH0754755B2 - X-ray fluoroscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to an X-ray diagnostic apparatus used in the medical field, and more particularly, to a continuous X-ray fluoroscopic imaging mode and a pulse X-ray fluoroscopic imaging mode. The present invention relates to an improvement of an X-ray fluoroscopic imaging apparatus of the type that uses both.

(Prior Art) When performing X-ray fluoroscopy, there are a method using continuous X-rays and a method using pulse X-rays, and both methods have come to be used together in recent years. In this case, the operation of starting the operation is performed by closing an opening / closing path (hereinafter referred to as a fluoroscopic switch) for starting X-ray irradiation, but in the conventional method, it is performed by two fluoroscopic switches that control the start of each operation. The method was used.

That is, in this method, in the case of fluoroscopic imaging with continuous X-rays, the fluoroscopic switch for continuous X-rays is closed while the fluoroscopic switch for pulsed X-rays is left open, and the fluoroscopic imaging with pulsed X-rays is performed. In this case, the operation method is to first open the fluoroscopic switch for continuous X-rays and then close the fluoroscopic switch for pulse X-rays.

(Problems to be Solved by the Invention) As described above, in the conventional operation method, the operation of the see-through switch becomes too complicated, which is a major drawback in using this type of device. Moreover, when continuous X-rays and pulse X-rays are continuously switched in this process,
Since the operation timing at the time of switching is not constant, the disadvantage that the X-ray control operation becomes temporarily unstable tends to occur.

On the other hand, when performing simultaneous two-direction fluoroscopy, pulse X-rays are used to prevent deterioration of image quality due to mutual scattering of X-rays. At this time, either simultaneous two-directions or one direction is selected. Since it is necessary to operate the opening / closing path to do so, there is a drawback in that those operations become more complicated in addition to the above-mentioned operations. Therefore, the emergence of improvement measures for these problems is strongly desired. The present invention has been made in view of the above circumstances, and an object thereof is to provide a new X-ray fluoroscopic imaging apparatus that improves the easiness of operation and the stability of X-ray control during a switching operation between both modes. To do.

[Structure of Invention]

(Means for Solving the Problems) According to the configuration of the present invention for achieving this object, the mode selecting means is used to switch between the continuous X-ray fluoroscopic imaging mode and the pulse X-ray fluoroscopic imaging mode. That is, the operation for starting the operation of the fluoroscopic imaging is not performed by the common fluoroscopic switch, and further, a constant delay time is set at the time of the switching operation between the both modes.

(Operation) The operation of the present invention based on this configuration improves the ease of operation by separately performing the operation for starting the operation of fluoroscopic imaging in both modes and the operation for switching between the two modes. This is to improve the stability of X-ray control during mode switching operation.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 is a block diagram showing an embodiment of an X-ray fluoroscopic imaging apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes an X-ray tube which is a radiation source of the X-ray fluoroscopic imaging apparatus, and a continuous X-ray fluoroscopic imaging mode. It is commonly used for both the X-ray imaging mode and the X-ray fluoroscopic imaging mode. Reference numeral 2 denotes a subject (examinee), and 3 denotes a photomultiplier tube (hereinafter, I) that receives X-rays transmitted through the subject 2 and visualizes them.
・ I), 4 is an X for capturing this visualized X-ray image
The line TV camera and 5 are TV monitors.

6 is a common see-through switch that controls the start of operation for both modes, 7 is a high voltage generator for supplying a high voltage to the X-ray tube 1, and 8 is the exposure time and exposure of the X-ray tube 1. In the X-ray control circuit that controls the operation of timing and the like, when the selection switch 10 described later is open, the high voltage generator 7 is instructed to output a relatively weak high voltage for continuous X-rays. Is configured in advance. Reference numeral 9 is a fluoroscopy control circuit, 10 is a selection switch (switch) which is a mode selection means for switching between a fluoroscopy imaging mode using continuous X-rays and a pulse X-rays, and 11 is a pulse X-ray imaging A control circuit, 12 is an X-ray delay time generation circuit, and 13 is a pulse X controlled by the X-ray control circuit 8.
This is for eliminating the phenomenon that the high voltage wave tail of the pulse X-ray remains in the line high voltage controller.

The operation of this configuration will be described below.

In the present invention, in both the continuous X-ray imaging mode and the pulse X-ray imaging mode, the operation of starting the fluoroscopic imaging is performed by closing the fluoroscopic switch 6. For example, as shown in the first illustration, the selection switch 10
When the X-ray is open, the X-ray fluoroscopic imaging mode is the continuous X-ray mode. Therefore, when the X-ray switch 6 is closed, the X-ray X-ray image of the continuous X-ray is obtained, and the selection switch 10 is closed. When the fluoroscopy switch 6 is closed at, an X-ray fluoroscopic image in the imaging mode by pulse X-rays is obtained.

That is, in the case of the continuous X-ray imaging mode, the X-ray control circuit 8 and the fluoroscopy control circuit 9 are actuated because the selection switch 10 is open, and the high voltage generator 7 outputs a comparatively continuous X-ray. A weak high voltage is output to the X-ray tube 1. for that reason,
X-rays of a predetermined intensity are continuously emitted from the X-ray tube 1, and the X-rays are transmitted through the subject 2 and photoelectrically converted by the I / I3 to form an X-ray fluoroscopic image. This X-ray perspective image is an X-ray TV camera 4
Is converted into an electric signal and is observed on the TV monitor 5.

When the fluoroscopy switch 6 is closed while the selection switch 10 is closed, the pulse X-ray imaging control circuit 11 is also activated, and when the selection switch 10 is opened or closed, the X-ray delay time generation circuit 12 is predetermined. To output a delayed pulse having a fixed time width to the fluoroscopic control circuit 9,
The X-ray exposure command issued by the fluoroscopic control circuit 9 is restricted (stopped) during this delay time. That is, as shown in the timing chart of FIG. 2, during this delay time, X-ray irradiation is not performed even if the fluoroscopic switch 6 is closed. Therefore, the switching control between the continuous X-ray and the pulse X-ray by the X-ray control circuit 8 is surely executed.

The pulse X-ray is generated when the selection switch 10 is closed and the perspective switch 6 is closed, as shown in the timing chart of FIG. 2, but the high voltage wave tail of the pulse X-ray generated at this time is shown. Since the remaining phenomenon is removed by the pulse X-ray high voltage controller 13, unnecessary X-ray exposure can be prevented.

The embodiment shown in FIG. 3 and FIG. 4 shows an embodiment in which simultaneous two-direction fluoroscopic imaging is performed. In the case of fluoroscopic imaging, the fluoroscopic direction when performing fluoroscopic imaging from only one direction is “ If it is defined as "front direction", the other perspective direction can be defined as "side direction", and it is so-called simultaneous 2
This is called direction perspective photography. In this embodiment, for convenience of explanation, the perspective direction in the case of the embodiment shown in FIG. 1 is defined as “front direction”, and the same symbols as those in FIG. 1 are common to those in the same figure. The description will proceed with the details omitted.

In the figure, 21 to 33 are constituent members provided for "lateral direction" respectively, 21 is an X-ray tube, 22 is a subject, 23 is a photomultiplier tube, 24 is an X-ray TV camera, 25 is a TV monitor, 26 is a see-through switch, 27 is a high voltage generator, 28 is an X-ray control circuit, 29 is a see-through control circuit, 32 is an X-ray delay time generation circuit, and 33 is a pulse X.
It is a line high voltage control device.

The operation of this embodiment will be described below. When the perspective switch 26 in the side direction is closed, the fluoroscopy control circuit 29 moves to the X-ray control circuit.
A fluoroscopic X-ray exposure signal is emitted to 28, and a high voltage generator 27 is controlled to apply a high voltage to the X-ray tube 21. Therefore, as in the case of the previous embodiment, a predetermined fluoroscopic X-ray is irradiated and the fluoroscopic image photoelectrically converted by I · I23 can be observed on the TV monitor 25. In this case, if this operation is performed with the selection switch 10 closed, the operation of the X-ray delay time generation circuit 32 switches to the pulse X-ray with the X-ray exposure being temporarily stopped. Then, at this time, the high voltage wave tail is removed by the action of the pulse X-ray high voltage controller 33, but these are the same as in the case of the previous embodiment (front direction).

When both the front perspective switch 6 and the side perspective switch 26 are closed at the same time, the pulse X-ray imaging control circuit 11 detects that both are closed at the same time, and the selection switch 10 is opened or closed. Regardless of the above, an attempt is made to generate a pulse X-ray. However, at this time, the X-ray control circuit 8 in the front direction sends an X-ray pulse signal to the X-ray control circuit 28 in the side direction, and as shown in the timing chart of FIG. Since both X-rays are prevented from being exposed at the same time, both X-rays are controlled to be emitted alternately.

Although two embodiments have been described above, the present invention is not limited to these, and it should be noted that various modifications can be made without departing from the scope of the invention.

〔The invention's effect〕

As described above, when the present invention is used, it becomes extremely easy to operate the fluoroscopic switch when the fluoroscopic imaging mode using continuous X-rays and the fluoroscopic imaging mode using pulsed X-rays are used together, and moreover, when switching between both modes. There is an effect that it is possible to provide an X-ray fluoroscopic imaging apparatus in which the stability of X-ray control is remarkably improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment according to the present invention, FIG. 2 is a timing chart diagram thereof, and FIG. 3 is a block diagram showing another example of the present invention applied when performing simultaneous two-direction fluoroscopic imaging. , FIG. 4 is a timing chart thereof. 1,21 …… X-ray tube, 2,22 …… Subject, 3,23 …… Photomultiplier tube, 4,24 …… X-ray TV camera, 5,25 …… TV monitor, 6,26
...... Transparent switch, 7,27 ...... High voltage generator, 8,28 ......
X-ray control circuit, 9,29 ... Fluoroscopic control circuit, 12, 32 ... X-ray delay time generation circuit, 10 ... Selection switch, 13, 33 ... Pulse X-ray high voltage control device, 11 ... Pulse X Radiographic control circuit.

Claims (2)

[Claims] 1. A continuous X-ray fluoroscopic imaging mode and pulse X
In an X-ray fluoroscopic imaging apparatus of a type that uses a fluoroscopic imaging mode using a line, the mode selection means can be used to switch between the two modes, and a fluoroscopic imaging operation start operation in both modes can be performed with a common fluoroscopic switch. An X-ray fluoroscopic imaging apparatus characterized in that it is configured so as to perform a constant delay time when switching between both modes. 2. The X-ray fluoroscopic imaging apparatus according to claim 1, wherein the X-ray fluoroscopic imaging apparatus is a two-direction fluoroscopic imaging apparatus, and the delay time is set in any of the fluoroscopic directions. Imaging device.