JPH07204188A - X-ray radiographic system - Google Patents

Abstract

PURPOSE:To reduce the burden of a testee and an operator and to avoid the unrequired X-ray exposure in the X-ray radiographic system capable of moving the X-ray tube for stereo photographing and setting it to a stereo photographing position or a monolithic photographing position according to a stereo selecting signal or a monolithic selection signal. CONSTITUTION:This device is provided with an X-ray exposure interlock means (gates C-G) collating the type selection signals 41 and 42 and signals 33 and 34 detecting the position of setting the photographing position of the stereo/ monolithic photographing position movement control circuit and unabling the X-ray to exposure when no X-ray tube for stereo photographing is set at the position of setting the photographing position corresponding to the selected style.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of moving an X-ray tube device for stereo photographing to set the stereo photographing position setting position or the mono photographing position setting position according to a stereo operation type selection signal or a mono operation type selection signal. The present invention relates to an X-ray imaging apparatus.

[0002]

2. Description of the Related Art In a conventional X-ray imaging apparatus of this type, even if a stereoscopic X-ray tube apparatus is mounted on a holding device, a stereo / mono imaging position moving mechanism is not provided and the X-ray apparatus for stereo imaging
The X-ray tube device for stereo photography is moved to and set to the stereo photographing position setting position or the mono photographing position setting position even if the X-ray tube device is directly mounted on the holding device and held, or even if the stereo / mono photographing position moving mechanism is provided. X-ray exposure if the stereo X-ray tube device is not set to the stereo photographing position setting position or the mono photographing position setting position in response to the stereo technique selection signal or the mono technique selection signal. X-ray exposure interlock means that prohibits the above is not provided.

An outline of mono shooting at the mono shooting position setting position and stereo shooting at the stereo shooting position setting position will be described with reference to FIG. The X-ray tube apparatus 3 for stereo imaging in FIG. 4 is a modeled X-ray tube apparatus.

There are two focal points, an R focal point and an L focal point, on a target T of an X-ray tube (not shown) mounted and fixed inside the stereoscopic X-ray tube device 3. R focus and L
The focal points are arranged at an interval of approximately both eyes of a human in a full-scale (contact) stereoscopic X-ray tube device, and at an interval of about 40 mm in the enlarged stereoscopic X-ray tube device 3 shown in FIG. . At the mono photographing position setting position, one of the two focal points (R focal point and L focal point) (R focal point in FIG. 4) of the stereoscopic X-ray tube device 3 is set on the X-ray image receiving surface 2 of the X-ray image receiving device. The position is set on a line perpendicular to the center 2a.

In a normal state, a negative high voltage bias voltage is applied to both the R focus and the L focus of the stereoscopic X-ray tube device 3, and a high voltage is applied to the stereoscopic X-ray tube device 3. However, X-rays are not exposed. By applying a high voltage to the X-ray tube device for stereo photography 3 and simultaneously setting the bias voltage of the R focus to about 0V, the X focus from the R focus is reduced.
The radiation is emitted to the subject 1 and the X-rays attenuated by the subject 1 are applied to the X-ray image receiving surface 2 of the X-ray image receiving apparatus to be recorded and a mono image is taken.

The X-ray exposure is stopped by turning off the high voltage applied to the X-ray tube apparatus 3 for stereo photography and simultaneously applying a negative high-voltage bias voltage to the R focus. In the stereo photographing setting position, the X-ray tube device 3 for stereo photographing is used.
The centers of the two focal points (R focal point and L focal point) are set on a line perpendicular to the center 2a of the X-ray image receiving surface 2 of the X-ray image receiving apparatus.

Next, the procedure of stereo photography will be described with reference to FIG. Under normal conditions, X-ray tube device 3 for stereo photography
A negative high voltage bias voltage is applied to both the R focus and the L focus, and even if a high voltage is applied to the stereoscopic X-ray tube device 3, X-rays are not exposed.

By applying a high voltage to the stereoscopic X-ray tube device 3 and simultaneously setting the bias voltage of the R focus to about 0 V, X-rays are irradiated from the R focus and irradiate the subject 1. The X-rays attenuated by the subject 1 are radiated and recorded on the X-ray image receiving surface 2 of the X-ray image receiving apparatus, and an image is taken at the R focus. By turning off the high voltage applied to the stereoscopic X-ray tube device 3 and simultaneously applying a negative high voltage bias voltage to the R focus, the X-ray exposure is stopped.

Next, a high voltage is applied to the X-ray tube device 3 for stereo photography, and at the same time, the bias voltage of the L focus is set to about 0 V, so that the X-ray is irradiated from the L focus to the subject 1. The X-rays that have been irradiated and attenuated by the subject 1 are irradiated and recorded on the X-ray image receiving surface 2 of the X-ray image receiving apparatus, and the imaging with the L focus is performed. By turning off the high voltage applied to the X-ray tube apparatus for stereo photography 3 and simultaneously applying a negative high bias voltage to the L focus, the X-ray exposure is stopped. This means that one set of stereo photography was performed.

In an X-ray imaging apparatus having a holding device for directly mounting and holding the X-ray tube apparatus 3 for stereo imaging without a stereo / mono imaging position moving mechanism, an X-ray imaging apparatus for stereo imaging is used.
Since the X-ray tube device 3 is fixed at the stereo photographing position setting position, only stereo photographing is possible. In mono photographing, the center of the X-ray cone and the center of the X-ray image receiving device do not coincide, and the X-ray irradiation field on the movable diaphragm side is not. Since it is difficult to set, it cannot be practically performed, and in particular, an X-ray exposure interlock is not required.

However, when the stereo / mono photographing position moving mechanism is provided, the stereo / mono photographing position moving mechanism changes the stereo photographing X-ray tube device 3 to the stereo photographing position or the mono photographing position of the X-ray high voltage device. Since the X-ray exposure interlock means for disabling the X-ray exposure is not provided unless the movement is completed according to the selection signal of the stereo technique or the mono technique,
It is necessary for the operator to visually check by comparing the set position of the stereo / mono shooting position moving mechanism with the selected surgical method.

If this visual confirmation is not carried out,
There is a possibility that X-ray exposure may be performed in a state where the stereoscopic X-ray tube device 3 has not reached the stereo image capturing position setting position or the mono image capturing position setting position. If imaging is performed without reaching the position, contrast medium injection and X-ray exposure may be required again after resetting, which increases the burden on the subject and the operator and also increases the X-ray exposure. It also affects the safety of the human body by receiving unnecessary X-ray exposure.

[0013]

In the above-mentioned prior art, the X-ray tube apparatus for stereo photographing 3 does not send the stereo photographing position setting position detection signal or the mono photographing position setting position detection signal to the X-ray high voltage device. If the X-ray high-voltage device compares the stereo operation type selection signal or the mono operation type selection signal with the stereo image pickup position setting detection signal or the mono image pickup position setting position detection signal and they do not match, X-ray exposure is prohibited. The X-ray exposure interlock means is not provided.

Therefore, regardless of the setting position of the X-ray tube device 3 for stereo imaging, X-ray exposure corresponding to the surgical method selected on the X-ray high-voltage device side is performed, and the stereo imaging position setting position or mono imaging is performed. If X-ray irradiation is performed in a state where the position setting position has not been reached, it is necessary to re-inject contrast agent and X-ray irradiation again after setting again, thus burdening the subject and the operator. There is a problem in that the X-rays are increased and the X-ray safety is affected by the X-ray exposure which is originally unnecessary.

An object of the present invention is to provide an X-ray imaging apparatus which can reduce the burden on the subject and the operator and can prevent X-rays from being exposed to unnecessary X-rays. It is in.

[0016]

The above object is to provide an X-ray high voltage device for generating a high voltage, an X-ray tube device for stereo imaging, and an X-ray tube device for stereo imaging in stereo imaging position or mono imaging position. Movably mounted on the X-ray high-voltage apparatus, and sets the X-ray tube apparatus for stereo photographing to a stereo photographing position setting position or a mono photographing position setting position in accordance with a stereo operation type selection signal or a mono operation type selection signal of the X-ray high voltage apparatus. Stereo / mono photographing position moving mechanism, stereo / mono photographing position moving control circuit for controlling the stereo / mono photographing position moving mechanism, X-ray image receiving device, X-ray image receiving device and the stereo / mono photographing position moving mechanism And a holding device that holds the stereoscopic X-ray tube device facing the X-ray image receiving device, and a stereoscopic selection signal of the X-ray high-voltage device and the stereo. X-ray exposure when the stereoscopic X-ray tube device is not set at the shooting position setting position corresponding to the selected surgical method by comparing with the shooting position setting position detection signal of the mono shooting position movement control circuit. This is achieved by providing an X-ray exposure interlock means that makes it impossible.

[0017]

When the stereo operation type selection signal or the mono operation type selection signal is input from the X-ray high voltage device to the stereo / mono photographing position movement control circuit, the stereo / mono photographing position movement control circuit moves to the stereo / mono photographing position movement. The X-ray tube for stereo photography is controlled when the mechanism is controlled to move the stereo photography X-ray tube device toward the stereo photography position setting position or the mono photography position setting position and reach the stereo photography position setting position or the mono photography position setting position. Stop the device and stop the movement.

At this time, the stereo / mono photographing position movement control circuit sends a stereo photographing position setting position detection signal or a mono photographing position setting position detection signal to the X-ray high voltage device. The X-ray exposure interlock means is a stereo selection signal and stereo /
The signals sent from the mono imaging position movement control circuit are compared, and if they match, a signal that enables X-ray irradiation is sent to the X-ray irradiation control circuit in the X-ray high-voltage device, and X-ray irradiation is performed. It will be possible,
If they do not match, a signal that enables X-ray irradiation is not transmitted, so that X-ray irradiation is not performed. As a result, it is possible to reduce the burden on the subject and the operator, and also to prevent the X-rays from being exposed to X-rays that are originally unnecessary.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a stereo / radio of an X-ray imaging apparatus according to the present invention.
It is a figure which shows an example of a mono photographing position moving mechanism, (a) is a side view, (b) is a top view. In FIG. 2, a stereo photographing X-ray tube device 3 to which a stereo photographing movable diaphragm 4 (only a part of which is shown in the figure) is fixed is fixed to a support (holding device) 8. The support 8 is held by a linear guide (not shown) attached to a support frame (not shown) of the stereo / mono shooting position moving mechanism 10 so as to be movable in the arrow direction in the figure.

A feed nut 13 having a feed screw 12 rotatably passed through is fixedly connected to the support 8. The feed screw 12 is attached to a support frame (not shown) of the stereo / mono photographing position moving mechanism 10 so that one end thereof can rotate. The pulley 16 is attached and fixed to the feed screw 12, is connected to the pulley 14 via a belt 15, and is also connected to the pulley 18 via a belt 17.

The pulley 18 is attached and fixed to the shaft of a potentiometer 19 which is attached and fixed to a support frame (not shown) of the stereo / mono photographing position moving mechanism 10. The pulley 14 is a stereo / mono photographing moving mechanism 10
Is fixed to an output shaft of a motor 11 having a motor / speed reducer integrated structure which is fixed to a support frame (not shown).

When the output shaft of the motor 11 rotates, the rotation is transmitted by the pulley 14, the belt 15 and the pulley 16, and the feed screw 12 rotates and the stereo image is fixedly mounted on the support 8 connected and fixed to the feed nut 13. The X-ray tube device 3 for stereo and the movable diaphragm 4 for stereo imaging attached to and fixed to the X-ray tube device 3 for stereo imaging move along the arrow direction in the figure. At this time, at the same time, the rotation is transmitted by the pulley 14, the belt 15, the pulley 16, the belt 17, and the pulley 18, and the shaft of the potentiometer 19 rotates, so that the stereo imaging position of the X-ray tube device 3 for stereo imaging can be changed.
The mono shooting position setting position is detected.

FIG. 3 is a block diagram showing an outline of an example of a control system of the stereo / mono photographing position moving mechanism 10 of the X-ray photographing apparatus according to the present invention. The stereo / mono photographing position moving mechanism control system will be described below. 2 will be described together. Here, the initial state is assumed as follows.

(1) The stereo technique is selected in the X-ray high voltage device 30, and the stereo technique selection signal output 31 is asserted (meaning to make a signal logically active. The same applies hereinafter). The mono operation type selection signal output 32 is negated (meaning to make a signal logically inactive. The same applies hereinafter).

(2) The stereo photographing X-ray tube device 3 is set to the stereo photographing position setting position by the stereo / mono photographing position moving control circuit 20, and the stereo photographing position setting of the stereo / mono photographing position moving control circuit 20 is performed. Position detection signal 3
3 is asserted, and the mono photographing position set position detection signal 34 is negated.

Under the above assumptions, the X-ray high voltage device 30
Negates the stereo technique selection signal output 31 when the mono photography technique is selected, and asserts the mono technique selection signal output 32. Stereo / mono shooting position movement control circuit 20
When the mono operation type selection signal output 32 is input, the stereo shooting position setting position detection signal 33 is negated, and at the same time, the motor driving output 21 in the mono shooting position setting direction is generated and applied to the motor 11. Start rotating in the mono shooting position setting direction.

The rotation of the motor 11 is transmitted through the pulley 14, the belt 15 and the pulley 16 so that the feed screw 1
Rotate 2 and support 8 connected to feed nut 13
The X-ray tube apparatus for stereo photography 3 fixed to the position moves in the mono photography position setting direction. At this time, the rotation of the motor 11 is simultaneously controlled by the pulley 14, the belt 15, the pulley 16, and the belt 1.
7 and the pulley 18, and the shaft of the potentiometer 19 rotates.

The output signal 22 of the potentiometer 19 is
It is input to the stereo / mono shooting position movement control circuit 20. The stereo / mono shooting position movement control circuit 20 continues to apply the motor drive output 21 to the motor 11 while the output signal 22 of the potentiometer 19 does not reach the mono shooting position setting position.

When the X-ray tube device 3 for stereo photography moves,
When the output signal 22 of the potentiometer 19 reaches the mono photographing position setting position, the stereo / mono photographing position movement control circuit 2
0 turns off the motor drive output 21, the motor 11 stops rotating, and the stereoscopic X-ray tube device 3 stops at the mono imaging position setting position. In addition, the stereo / mono shooting position movement control circuit 20 is configured to detect the mono shooting position set position detection signal 34 at this time.
Assert.

The X-ray high voltage device 30 negates the mono-operation method selection signal output 32 when the stereo operation method is selected, and asserts the stereo operation method selection signal output 31. When the stereo technique selection signal output 31 is input, the stereo / mono shooting position movement control circuit 20 negates the mono shooting position setting position detection signal 34 and simultaneously generates the motor driving output 21 in the stereo shooting position setting direction. The voltage is applied to the motor 11, and the motor 11 starts rotating in the stereo photographing position setting direction.

The rotation of the motor 11 is transmitted through the pulley 14, the belt 15 and the pulley 16 to rotate the feed screw 12, and the X-ray tube apparatus for stereo photography fixed to the support 8 connected to the feed nut 13. 3 moves in the stereo photographing position setting direction.

At the same time, the rotation of the motor 11 is transmitted through the pulley 14, the belt 15, the pulley 16, the belt 17 and the pulley 18, and the shaft of the potentiometer 19 rotates.

Stereo / mono shooting position movement control circuit 20
Continues to apply the motor drive output 21 to the motor 11 while the output signal 22 of the potentiometer 19 has not reached the stereo photographing position setting position. When the stereo imaging X-ray tube device 3 moves and the output signal 22 of the potentiometer 19 reaches the stereo imaging position setting position, the stereo / mono imaging position movement control circuit 20 turns off the motor drive output 21,
The motor 11 stops rotating, and the X-ray tube apparatus 3 for stereo imaging stops at the stereo imaging position setting position. At this time, the stereo / mono shooting position movement control circuit 20 asserts the stereo shooting position set position detection signal 34.

FIG. 1 is a diagram showing an example of a main part of an internal circuit of an X-ray high voltage device 30 of an X-ray imaging apparatus according to the present invention.
In FIG. 1, when the monoscopic technique is selected, the stereo technique selection signal 41 is negated, and the stereo technique selection signal output 31, which is the output of the inverter gate A, is also negated. At this time, the mono technique selection signal 42, which is the output of the inverter gate B, is also asserted. At this time, the stereo photographing position set position detection signal 33 of the stereo / mono photographing position movement control circuit 20 is negated.

Further, the mono photographing position setting position detection signal 34 is
The rotation of the motor 11 driven by the motor drive output 21 of the stereo / mono imaging position movement control circuit 20 is negated until the stereo imaging X-ray tube device 3 reaches the mono imaging position setting position. Output 35 and inverter gate D output 36 are also negated.

Therefore, the output 43 of the AND gate E and the output 44 of the AND gate F are negated, and the output 45 of the exclusive OR gate G is also negated. Therefore, the output 4 of the AND gate H of the X-ray exposure control circuit 50
7 maintains the negated state, the X-ray exposure control circuit 50 does not send the control signal to the high voltage circuit (not shown) even when the X-ray exposure timing signal 46 is asserted, and the X-ray is emitted. Not done.

When the X-ray tube apparatus for stereo photographing 3 reaches the mono photographing position setting position and stops, the mono photographing position setting position detection signal 34 of the stereo / mono photographing position movement control circuit 20 is asserted, and the output of the inverter gate D is output. 36 is also asserted, so that the two inputs of the AND gate F (mono operation selection signal 42 and the output 36 of the inverter gate D)
Are both asserted and AND gate F
Output 44 is asserted.

At this time, since the two inputs of the AND gate E (stereo technique selection signal 41 and the output 35 of the inverter gate C) are both negated, the output 43 of the AND gate E is also negated. Two inputs of exclusive OR gate G (output 4 of AND gate E)
3 and the output 44) of the AND gate F become the above state, the output 45 of the exclusive OR gate G is asserted.

In this state, the X-ray exposure timing signal 46
Is asserted and then negated, the output 47 of the AND gate H of the X-ray exposure control circuit 50 is asserted in association with the assertion of the X-ray exposure timing signal 46 and the subsequent negation of the X-ray exposure timing signal 46. Will be negated.

The X-ray exposure control circuit 50 has an AND gate H
A high voltage circuit (not shown) is controlled so as to irradiate X-rays at the timing when the output 47 of the X.
X-rays are radiated from one focus of the X-ray tube device 3, and X-rays are radiated and recorded on the image receiving surface of the X-ray image receiving device to perform mono imaging.

When the stereo photography technique is selected, the mono technique selection signal 42 is negated and the inverter gate B
The mono operation type selection signal output 32, which is the output of, is also negated. At this time, the stereo technique selection signal 41 is asserted, and the stereo technique selection signal output 31, which is the output of the inverter gate A, is also asserted.

At this time, the mono photographing position set position detection signal 34 of the stereo / mono photographing position movement control circuit 20 is negated. In addition, the stereo photographing position setting position detection signal 33
Is the rotation of the motor 11 driven by the motor drive output 21 of the stereo / mono shooting position movement control circuit 20,
The stereoscopic X-ray tube device 3 is negated until the stereoscopic photographing position setting position is reached, and the output 35 of the inverter gate C and the output 36 of the inverter gate D are also negated.

Therefore, the output 43 of the AND gate E and the output 44 of the AND gate F are negated, and the output 45 of the exclusive OR gate G is also negated. Therefore, the output 47 of the AND gate H of the X-ray emission control circuit 50 maintains the negated state, and even if the X-ray emission timing signal 46 is asserted, the X-ray emission control circuit 50 is not operated by the high voltage circuit (not shown). No control signal is sent to (x), so that no X-ray is emitted.

When the X-ray tube apparatus for stereo photographing 3 reaches the stereo photographing position setting position and stops, the stereo photographing position setting position detection signal 33 of the stereo / mono photographing position movement control circuit 20 is asserted and the output of the inverter gate C is output. When 35 is also asserted, the two inputs of the AND gate E (stereo technique selection signal 41 and inverter gate C
Output 35) of the AND gate E becomes asserted, and the output 43 of the AND gate E is asserted. At this time,
Since the two inputs of the AND gate F (mono operation selection signal 42 and the output 36 of the inverter gate D) are both negated, the output 44 of the AND gate F is negated.

When the two inputs of the exclusive OR gate G (the output 43 of the AND gate E and the output 44 of the AND gate F) are in the above states, the output 45 of the exclusive OR gate G is asserted. In this state, X
When the line exposure timing signal 46 is asserted and then negated, the output 47 of the AND gate H is asserted in association with the assertion of the X-ray exposure timing signal 46 and negated in accordance with the subsequent negation of the X-ray exposure timing signal 46. To be done.

The X-ray exposure control circuit 50 has an AND gate H
A high voltage circuit (not shown) is controlled so as to irradiate X-rays at the timing when the output 47 of the X.
X-rays are radiated from one focus of the X-ray tube device 3, and the image-receiving surface of the X-ray image receiving device is irradiated with X-rays for recording. By the next assertion of the X-ray exposure timing signal 46 and subsequent negation, the X-ray exposure control circuit 50 causes the high voltage circuit (not shown) to emit the X-ray at the asserted timing of the output 47 of the AND gate H. X) for stereo shooting
A high voltage is applied to the X-ray tube device 3 to irradiate X-rays from the other focal point of the X-ray tube device 3 for stereo photography, and the X-rays are radiated and recorded on the image receiving surface of the X-ray image receiving device. Will be taken in stereo.

When the X-ray tube apparatus 3 for stereo photographing does not reach the stereo photographing position setting position or the mono photographing position setting position, both the stereo photographing position setting position detection signal 33 and the mono photographing position setting position detection signal 34 are negated. Output 47 of the AND gate H of the X-ray exposure control circuit 50.
Is maintained in a negated state, the X-ray exposure control circuit 5 does not operate even if the X-ray exposure timing signal 46 is asserted.
Since 0 does not send a control signal to a high voltage circuit (not shown), X-rays are not exposed. That is, X-ray exposure is interlocked.

In the above-mentioned embodiment, the X-ray irradiation for photographing is explained as an example, but it goes without saying that the same is true when X-ray irradiation other than photographing such as fluoroscopy is performed. . Further, in the above-described embodiment, the X of the movable diaphragm for stereo photography is used.
The stereo shooting position setting irradiation field detection signal or the mono imaging setting irradiation field detection signal of the line irradiation field setting is not input to the X-ray exposure interlock means, but the X of the movable diaphragm for stereo imaging is used.
Even more effective X-ray interlock means can be obtained by adding the setting of the radiation field to the interlock condition. In addition, when X-ray irradiation is not possible, it is possible to notify the operator of the cause by generating sound, displaying characters, icons, etc., and blinking in response to the operator's X-ray irradiation operation. Is.

[0049]

As described above, according to the present invention, the stereoscopic X-ray tube device is moved to the photographing position setting position corresponding to the stereo surgical technique or the mono surgical technique selected before photographing. It is not necessary for the surgeon to visually confirm that the shooting position setting position corresponds to the surgical method while moving to the stereo shooting position setting position or the mono shooting position setting position or the stereo / mono shooting position moving mechanism malfunctions. If the X-ray tube device for stereo imaging cannot be moved, X-rays are not exposed,
Since there is no need to perform contrast agent injection and X-ray irradiation again, unnecessary burden is not imposed on the subject and the operator,
In addition, with respect to the safety of X-rays, there is an effect that it is possible to prevent exposure to X-rays that is originally unnecessary.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a main part of an internal circuit of an X-ray high-voltage device of an X-ray imaging apparatus according to the present invention.

FIG. 2 is a diagram showing an example of a stereo / mono shooting position moving mechanism of the same apparatus.

3 is a block diagram showing an outline of an example of a control system of the stereo / mono shooting position moving mechanism shown in FIG.

FIG. 4 is a schematic explanatory diagram of mono photography and stereo photography.

FIG. 5 is an explanatory diagram of a procedure of stereo photography.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Subject 2 X-ray image receiving surface of X-ray image receiving apparatus 2a X-ray image receiving surface center 3 X-ray tube device for stereo imaging 4 Movable diaphragm for stereo imaging 8 Support (holding device) 10 Stereo / mono imaging position moving mechanism 11 Motor 12 Feed screw 13 Feed nut 14, 16, 18 Pulley 15, 17 Belt 19 Potentiometer 20 Stereo / mono shooting position movement control circuit 30 X-ray high voltage device 31 Stereo technique selection signal output 32 Mono technique selection signal output 33 Stereo photography Position setting position detection signal 34 Mono shooting position setting position detection signal 41 Stereo technique selection signal 42 Mono technique selection signal A to D Inverter gate E, F AND gate G Exclusive OR gate H AND gate 50 X-ray exposure control circuit

Claims (1)

[Claims] 1. An X-ray high voltage device for generating a high voltage, a stereo imaging X-ray tube device, and the stereo imaging X-ray tube device movably mounted in a stereo imaging position or a mono imaging position. A stereo / mono photographing position moving mechanism for setting the stereo photographing X-ray tube device to a stereo photographing position setting position or a mono photographing position setting position in accordance with a stereo technique selection signal or a mono technique selection signal of the linear high voltage device. , A stereo / mono photographing position movement control circuit for controlling the stereo / mono photographing position moving mechanism, an X-ray image receiving device, and the X-ray for stereo photographing holding the X-ray image receiving device and the stereo / mono photographing position moving mechanism. An X-ray imaging apparatus including a holding device that holds a X-ray tube device facing the X-ray image receiving device, wherein an operation selection signal of the X-ray high-voltage device and an image of the stereo / mono imaging position movement control circuit are captured. An X-ray exposure that prohibits X-ray exposure when the stereoscopic X-ray tube device is not set at the imaging position setting position corresponding to the selected surgical method by comparing with the position setting position detection signal. An X-ray imaging apparatus comprising interlock means.