JP2000030890A - X-ray high-voltage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray high-voltage device automatically closing a collimator when selecting the X-ray condition for aging an X-ray tube with an operation panel. SOLUTION: When the X-ray condition for aging an X-ray tube 3 is selected via a selector switch group 2 on an operation panel 1, a CPU 7 reads out the data of the X-ray condition for aging from a memory 10 and feeds the control signal for closing a collimator 4 to a collimator controller 9 via an interface 8. The CPU 7 also feeds a signal to a high-voltage generator 12 via an interface 11 and applies a high voltage to the X-ray tube 3 to radiate X-rays. The collimator 4 is closed at this time, and no useless X-rays are radiated in an inspection room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an X-ray high-voltage device, and more particularly to an X-ray high-voltage device having an operation panel capable of presetting X-ray conditions for aging an X-ray tube.

[0002]

2. Description of the Related Art An X-ray high-voltage apparatus is used for an X-ray fluoroscopic apparatus. In this case, as shown in FIG. 2, an X-ray fluoroscopic apparatus XD is provided in an examination room, and a stand console is provided in an operation room. Type X-ray high voltage device HD is installed. Imaging by such a device is performed in the following procedure. First, the subject is placed on the imaging table 5 in the examination room, and the field of view of the imaging site is positioned by manually adjusting the aperture with the light of the sight of the collimator 4. Then, the operator enters the operation room, selects the X-ray condition of the selection switch group 2 of the operation panel 1 of the control device 13 from the program, and presses the X-ray exposure switch.
Thus, the affected part can be photographed under the automatically selected condition.

The control unit 13 in the X-ray high voltage device HD
The upper operation panel 1 includes a switch for inputting various parameters for the operator to control the X-ray system, and a display for notifying the operator of the state of the system. When setting various parameters, instead of setting for each parameter, set a plurality of combinations of these patterns in advance for each purpose to be photographed, and quickly set them with simple operation when necessary A program controller that can be used is used. The operator may set a program or the like in which the aging X-ray conditions of the X-ray tube 3 are set.

A collimator 4 (movable diaphragm for X-rays) attached to an emission port of an imaging table 5 adjusts an X-ray irradiation field, so that X-rays can be applied only to a portion necessary for fluoroscopy or imaging.
The primary purpose is to reduce the exposure dose to the subject by irradiating the radiation. Furthermore, it is equipped with an out-of-focus X-ray reduction blade, a light projecting sight for aiming the irradiation field with a light, an additional filter, a scale plate, and the like. The collimator aperture is adjusted manually to set the required irradiation field. In the case of remote control, a fluoroscopic image is observed on a monitor, and a collimator aperture is manually adjusted with a handle on an operation panel. At the time of shooting, the aperture of the collimator can be automatically opened to the required film size.

On the other hand, in order to maintain the performance of the X-ray tube 3 on the imaging table 5, the X-ray tube 3 is aged by the X-ray high-voltage device HD. This is a series of running-in operations performed when the X-ray tube 3 is used for the first time and is not used for a certain period of time but is used again. If the X-ray tube 3 is left without being used, the internal state deteriorates. For example, even if the X-ray tube 3 has a maximum working voltage of 150 kV, it can only withstand a voltage of several tens of kV. It may be. In such a state, if a high voltage is applied suddenly, the same phenomenon as an overvoltage occurs, and the X-ray tube 3 becomes defective. There are various aging methods. First, a low voltage is applied, the voltage is gradually increased, and then the rated value is increased to a normal state. After a certain time, the voltage is decreased. If an abnormal phenomenon such as tube current instability occurs while the voltage is increasing, the voltage is reduced until the abnormality stops, and the voltage is increased again after the voltage is stabilized. The period during which the X-ray tube 3 is at rest, the method of applying the tube voltage, and the tube current value differ depending on the type of the X-ray tube 3.
As described in the instruction manual, a person who manages and operates the X-ray fluoroscopic apparatus XD is aging the X-ray tube 3.

[0006]

The conventional X-ray high-voltage apparatus HD is constructed and used as described above. However, in order to prevent unnecessary X-ray radiation into the examination room, when aging is performed, X-rays are used. It is usual to close the irradiation field limiting collimator 4 attached to the emission opening of the tube 3. The operator performing aging selects the preset aging X-ray condition with the control device 13 of the X-ray high-voltage device HD on the operation room side, enters the examination room, and sets the emission port of the X-ray tube 3 to the aging position. The operation of opening and closing the collimator 4 to close the aperture of the collimator 4 and then exiting the examination room and performing an X-ray emission operation for aging is a troublesome operation.

The present invention has been made in view of such circumstances, and the control device 13 of the X-ray high-voltage device HD uses
When X-ray conditions for aging of the tube 3 are set, the collimator 4 automatically closes the X-ray high-voltage device HD.
The purpose is to provide.

[0008]

In order to achieve the above object, an X-ray high voltage apparatus according to the present invention has an operation panel capable of presetting X-ray conditions for aging an X-ray tube. In the X-ray high-voltage device, a control circuit is provided which automatically closes an aperture of a collimator attached to an emission port of the X-ray tube with a signal for setting an X-ray condition for aging of the X-ray tube. Therefore, an operation panel capable of presetting the X-ray conditions for aging of the X-ray tube is transmitted to a control circuit that automatically closes the aperture of the collimator by transmitting a signal for setting the X-ray conditions to the collimator. Close the iris and put unnecessary X in the inspection room during aging.
Does not emit lines.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the X-ray high-voltage device of the present invention will be described with reference to FIG. FIG. 1 shows in particular the control circuit of the high-voltage device according to the invention in detail. The X-ray high-voltage device HD includes an operation panel 1, an X-ray irradiation condition selection switch group 2 arranged on the operation panel 1, an X-ray tube 3, a collimator 4, and an imaging table 5. The control circuit of the CPU 7, the memory 10 and the peripheral interface 6,
8 and 11, a collimator controller 9, and a high voltage generator 12.

When X-ray exposure conditions for fluoroscopy or radiography are selected on a group of selection switches 2 arranged on the operation panel 1 of the X-ray high-voltage device HD, the signals are input to the CPU 7 via the interface 6. Is done. The CPU 7 stores the X-ray exposure conditions selected by the selection switch group 2 in the memory 1
Data is read from 0, and enters the high voltage generator 12 via the interface 11 to apply a high voltage to the X-ray tube 3 to emit X-rays. At this time, the CPU 7 does not send a signal for closing the collimator 4 to the collimator controller 9 via the interface 8. Therefore, the collimator 4 is used by being opened to a size required for fluoroscopy or imaging.

On the other hand, when the X-ray condition for aging the X-ray tube 3 is selected on the selection switch group 2, the CPU 7 reads out the data of the aging X-ray condition from the memory 10 and controls the collimator through the interface 8. A control signal for closing the collimator 4 is sent to the vessel 9. At the same time, a signal is sent to the high voltage generator 12 via the interface 11 to apply a high voltage to the X-ray tube 3 to emit X-rays. At this time, since the collimator 4 is closed, no unnecessary X-rays are emitted into the inspection room. As described above, the operator sets the X-ray condition for aging the X-ray tube 3 in the operation room.
By selecting from the selection switch group 2 on the operation panel 1 of the line high voltage device, a control signal for closing the collimator 4 is sent to the collimator controller 9 and the collimator 4 is automatically closed.

In the above embodiment, the case where the controller mechanism of the X-ray high-voltage device HD is connected to one X-ray tube 3 is described. By selecting X-ray conditions for X-ray tube selection and aging from the selection switch group 2 of the operation panel 1, the same can be applied.

[0013]

The X-ray high-voltage apparatus of the present invention is configured as described above, and the X-ray conditions for aging the X-ray tube are selected on the operation panel which is preset. Then, the signal is sent to the collimator control circuit,
Since the aperture of the collimator is automatically closed, the operator can safely perform an aging operation without entering the X-ray examination room.

[0014]

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of an X-ray high voltage device of the present invention.

FIG. 2 is a diagram showing a conventional X-ray high voltage device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Operation panel 2 ... Selection switch group 3 ... X-ray tube 4 ... Collimator 5 ... Imaging stand 6 ... Interface 7 ... CPU 8 ... Interface 9 ... Collimator controller 10 ... Memory 11 ... Interface 12 ... High voltage generator 13 ... Control Equipment XD: X-ray fluoroscope HD: X-ray high-voltage equipment

Claims (1)

[Claims] A signal for setting an X-ray condition for aging of an X-ray tube in an X-ray high-voltage device having an operation panel capable of presetting an X-ray condition for aging of the X-ray tube. And a control circuit for automatically closing a stop of a collimator attached to an emission port of the X-ray tube.