JP2015198840A - Radiation generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a smaller radiation generating device by preventing a power supply part from being enlarged in the radiation generating device.SOLUTION: A radiation generating device comprises a radiation generating part which generates a radiation, an arm which supports the radiation generating part, a column which supports the arm, a battery which outputs DC voltage, and a generation part which generates voltage to be supplied to the radiation generating part by boosting the DC voltage output from the battery. The generation part is arranged in the column.

Description

  The present invention relates to a reduction in size and weight of a radiation generation apparatus having a radiation generation unit that generates radiation.

  In the medical field, a radiographic system that performs image diagnosis using radiation is used. In general, radiation imaging is performed in a radiation room in a hospital. Recently, in order to meet the needs of home medical care, there is a radiation generating apparatus that can perform imaging at a patient's home. Usually, when performing imaging using a radiation generating apparatus, the radiation generating unit is installed at a high position and at a position that matches the imaging region of the patient. Therefore, an apparatus for generating radiation has been proposed that includes an arm that supports the radiation generating unit and a support column that supports the arm (see Patent Document 1).

JP 2012-070885 A

  However, in the radiation generating apparatus of Patent Document 1, a power source for a radiation generating unit (hereinafter referred to as a power source), which is a high-pressure generator for generating radiation, is configured separately from a structure on which the radiation generating unit is mounted. Therefore, the wiring and installation work of the radiation generating unit and the power source are complicated, and the wiring cable and the like are also obstructive.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a radiation generating apparatus that is more convenient to use.

In order to achieve the above object, an apparatus for generating radiation according to one aspect of the present invention comprises the following arrangement. That is,
A radiation generator for generating radiation;
An arm for supporting the radiation generating unit;
A column supporting the arm;
A battery that outputs a DC voltage;
Generating means for boosting a DC voltage output from the battery and generating a voltage to be supplied to the radiation generating unit;
The generating means is disposed inside the support column.

  ADVANTAGE OF THE INVENTION According to this invention, the complexity of the operation | work resulting from a power supply is prevented, and the radiation generating apparatus which is easier to use is provided.

The figure which shows the external appearance of the apparatus for radiation generation which concerns on embodiment. The figure which shows the mode of photographing when a patient is image | photographed with the apparatus for radiation generation which concerns on embodiment. The block diagram which shows the example of an internal structure of the apparatus for radiation generation which concerns on embodiment. It is a side view of the support | pillar lower part of the apparatus for radiation generation which concerns on embodiment.

  Hereinafter, one preferred embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1A to FIG. 1C are views showing an external appearance of a radiation generating apparatus according to the embodiment. The radiation generating apparatus of the present embodiment includes a radiation generating unit 1 that generates radiation (for example, X-rays), an arm 2 that supports the radiation generating unit, a support column 3 that supports the arm 2, and a battery that outputs a DC voltage. 8 is a portable radiation generating device 16 mounted on the carriage 5. The radiation generating device 16 is easily configured to move by the carriage 5 on which the front wheels 6 and the rear wheels 4 are installed. A support 5 and a battery 8 are mounted and fixed on the carriage 5. The support column 3 is vertically installed with respect to the moving surface of the carriage 5, the arm 2 is installed to be rotatable with respect to the support column 3, and the radiation generating unit 1 is installed to be rotatable with respect to the arm 2. ing. In addition, the radiation generation unit 1 is provided with a control circuit 15 that provides a user interface unit for setting radiation irradiation conditions and performs various controls of the radiation generation unit 1.

  The front wheel 6 and the rear wheel 4 installed on the carriage 5 rotate with respect to the floor surface. The front wheel 6 and the rear wheel 4 are a plurality of tires or casters and are always in contact with the floor surface. By rotating the front wheel 6 and the rear wheel 4, the radiation generating device 16 can be moved.

  At the upper end of the column 3, a handle 7 is installed for an operator to hold when the radiation generating device 16 is carried. The operator can move the radiation generating apparatus 16 by grasping the handle 7 and pushing it in the traveling direction. A battery 8 for supplying power to the radiation generating unit 1 and the control circuit 15 is installed at the lower end of the column 3. The battery 8 is configured to be detachable, and an operator can freely replace the battery 8. The output voltage of the battery 8 is set to 60 V or less that can be replaced by the operator.

  Inside the support column 3, a generating unit that generates a voltage that boosts the DC voltage output from the battery 8 and supplies the DC voltage to the radiation generating unit 1 is disposed. The generation unit includes, for example, a booster circuit 9 for boosting a DC voltage supplied from the battery 8 and an inverter 11 that converts the DC voltage boosted by the booster circuit 9 into an AC voltage. The battery 8 is electrically connected to the booster circuit 9, and the booster circuit 9 is electrically connected to the inverter 11.

Further, a cable 13 for supplying the AC voltage converted by the inverter 11 to the radiation generating unit 1 is wired through the inside of the column 3 and the inside of the arm 2. The cable 13 is temporarily routed to the outside of the column 3 at the rotating portion between the column 3 and the arm 2, and then wired inside the arm 2. Further, the cable 13 is routed to the outside of the arm 2 again at the rotating portion between the arm 2 and the radiation generating unit 1 and then wired to the radiation generating unit 1.
In the booster circuit 9 and the inverter 11 arranged inside the column 3, heat radiating portions (heat radiating metal plates) 10 and 12 are installed. Circuit parts or the like that generate heat during driving, such as a power control IC, are attached to the heat radiating units 10 and 12. The heat radiating units 10 and 12 are installed on one surface of the booster circuit 9 and the inverter 11. The heat radiating units 10 and 12 are installed on a surface different from the side surface on which the battery 8 is installed in the booster circuit 9 and the inverter 11 so that the battery 8 is not affected by heat. Specifically, the heat radiating units 10 and 12 are installed on the side opposite to the side on which the battery 8 is installed in the booster circuit 9 and the inverter 11. Further, a heat insulating part (heat insulating member) 14 is installed between the booster circuit 9 and the battery 8. The heat insulation part 14 can block the heat of the booster circuit 9 and the battery 8 from each other.

  FIG. 2 is a diagram showing a configuration for imaging a patient using the radiation generating apparatus 16. The operator rotates the arm 2 of the radiation generating device 16 to place the radiation generating unit 1 above the patient 23 in a bed state and an FPD 24 (Flat Panel Detector) below the patient 23. The operator adjusts the radiation irradiation position, the position of the FPD 24 and the imaging region of the patient 23, operates a radiation exposure button (not shown), and irradiates and performs imaging. The FPD 24 detects a radiographic image transmitted through the patient 23 and obtains radiographic image data.

  FIG. 3 is a block diagram showing an internal electrical configuration of the radiation generating apparatus 16. The booster circuit 9 boosts the DC voltage supplied from the battery 8 to a higher DC voltage and outputs it. Specifically, the voltage of DC 60V or less output from the battery is boosted to, for example, DC 250V and output. The inverter 11 converts the DC voltage input from the booster circuit 9 into an AC voltage. Specifically, the DC voltage boosted by the booster circuit 9 is converted into an AC voltage having a frequency of 40 kHz, for example, and output. The AC voltage output of the inverter 11 is supplied to the high voltage generator 26 inside the radiation generator 1.

  In the high voltage generator 26, the AC voltage output from the inverter 11 is boosted to a higher voltage using a high voltage transformer, and then converted into a DC voltage (tube voltage) by a rectifier circuit. The DC voltage value output from the rectifier circuit is fed back to the control circuit 15 and controlled so that the DC voltage output from the high voltage generator 26 becomes the tube voltage set in the control circuit 15. The high voltage generator 26 also controls a circuit that generates thermoelectrons such as filaments inside the radiation tube 25 (for example, an X-ray tube), and the tube current value is fed back to the control circuit 15 so that the control circuit can be used during radiation irradiation. It is controlled so that the tube current set to 15 is obtained.

  For example, if the imaging conditions are set to a tube voltage of 125 kV and a tube current of 32 mA, the radiation output is 4 kW. If the power loss is 20% and the battery voltage is 50V, the current flowing through the cable 13 is 100A. When the output voltage of the battery is set to 60 V or less that can be replaced by the operator, a very large current must be supplied to the radiation generator 1 as described above. In order to supply a large current, it is necessary to use a thick cable to reduce voltage drop and heat generation, and it is difficult to secure the wiring place, and it hinders the movement of moving parts, etc. Will occur. Therefore, in the present embodiment, the booster circuit 9 is disposed near the battery 8 and the output of the battery 8 is boosted by the booster circuit 9 to suppress the current value flowing through the cable. For example, when the output of the booster circuit 9 is 250 V, the value of the current flowing through the cable 13 can be reduced to 20A.

  With the configuration as described above, the cable 13 that transmits a long distance can be thinned, so that wiring to the inside of the column and the arm is facilitated, and the hindrance to the movement of the movable portion can be reduced. . Further, by arranging the booster circuit 9 and the inverter 11 inside the support column 3, since the wiring does not go outside, the movement and installation work of the radiation generating device 16 becomes easy. Furthermore, since the booster circuit 9 and the inverter 11 that are heavy objects are arranged at the lower end inside the support column 3, the weight balance is improved, and the mechanism for stabilizing the support column 3 can be simplified.

  Next, the arrangement of the booster circuit 9 and the inverter 11 inside the support column 3 of the radiation generating apparatus 16 of this embodiment will be described in more detail.

  FIG. 4 is a diagram for explaining the arrangement state of the booster circuit 9, the inverter 11, and the battery 8 inside the lower end of the column 3. The battery 8 is disposed outside the support column 3 and at a position adjacent to the booster circuit 9. Further, the booster circuit 9 and the inverter 11 are arranged inside the column 3 so that the heat generated when driving them is radiated to the column 3. For example, in the booster circuit 9, a power supply control IC 18 that generates heat when voltage is output and a heat radiating portion (heat radiating metal plate) 10 are arranged on the opposite surface of the battery 8. Similarly, in the inverter 11, a power supply control IC 20 that generates heat during voltage output and a heat radiating portion (heat radiating metal plate) 12 are disposed on the opposite surface of the battery 8.

  The heat radiating portions 10 and 12 have a structure in which the heat radiating portions 10 and 12 are brought into contact with the inner surface of the support column 3 via a heat conductive sheet or the like so that the heat conductivity is increased. By using a material having high thermal conductivity for the column 3, heat generated in the booster circuit 9 and the inverter 11 can be efficiently radiated.

  The cable 22 is a cable that connects the battery 8 and the booster circuit 9. Since a large current flows through the cable 22, it is necessary to shorten the wiring length in order to reduce the loss. Therefore, the battery 8 and the booster circuit 9 are disposed at adjacent positions so that the cable length is as short as possible. Further, a heat insulating portion 14 is disposed between the booster circuit 9 and the battery 8. By disposing the heat insulating portion 14, it is possible to prevent or reduce heat generated from the booster circuit 9 from being conducted to the battery 8. Further, since the heat dissipating portions (heat dissipating metal plates) 10 and 12 functioning as heat dissipating portions when the booster circuit 9 and the inverter 11 are driven are disposed so as to be in contact with the column surface opposite to the battery 8, The heat generated from the circuit components is difficult to be transmitted to the battery 8.

  The above is the description regarding the arrangement of the booster circuit 9, the inverter 11, and the battery 8 of the radiation generating apparatus 16 in the present embodiment.

  With the above configuration, the configuration of the radiation generating device 16 can be further simplified, and it is not necessary to provide a dedicated cooling mechanism for the booster circuit 9 and the inverter 11 that are the power source for the radiation generating unit. The generator power supply can be made smaller and lighter. Furthermore, it is possible to prevent the battery 8 from being deteriorated due to the heat generated by the power supply control IC being transmitted to the adjacently arranged battery 8.

  Note that the above-described embodiment is merely an example of the implementation of the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

DESCRIPTION OF SYMBOLS 1: Radiation generation part, 2: Arm, 3: Support | pillar, 8: Battery, 9: Booster circuit, 11: Inverter, 13: Cable, 14: Heat insulating material, 25: Radiation tube, 26: High voltage generation circuit

Claims (10)

A radiation generator for generating radiation;
An arm for supporting the radiation generating unit;
A column supporting the arm;
A battery that outputs a DC voltage;
Generating means for boosting a DC voltage output from the battery and generating a voltage to be supplied to the radiation generating unit;
An apparatus for generating radiation, wherein the generating means is disposed inside the support column. The generating means includes
A booster circuit for boosting a DC voltage output from the battery;
An inverter that converts the DC voltage boosted by the booster circuit into an AC voltage;
The apparatus for generating radiation according to claim 1, wherein an alternating voltage generated by the inverter is supplied to the radiation generating unit.   The radiation generating unit according to claim 2, wherein a cable for supplying the AC voltage from the inverter to the radiation generating unit is wired to the radiation generating unit through the arm and the inside of the support column. apparatus.   4. The radiation generating apparatus according to claim 2, wherein the booster circuit and the inverter are arranged inside the support column so that heat generated by the booster circuit and the inverter is dissipated to the support column. 5. .   The radiation generating apparatus according to claim 4, wherein the booster circuit and the inverter are in contact with an inner surface of the support through a heat conductive sheet.   The radiation generating apparatus according to claim 2, wherein the battery is disposed outside the support column and at a position adjacent to the booster circuit.   The heat-dissipating part that dissipates heat generated by the booster circuit and the inverter is provided, and the heat-dissipating part is installed on a surface different from the side where the battery is installed in the booster circuit and the inverter. Item 7. The radiation generating apparatus according to any one of Items 2 to 6.   The radiation generating apparatus according to claim 7, wherein the heat radiating unit is installed on a side surface opposite to a side surface on which the battery is installed in the booster circuit and the inverter.   The radiation generating apparatus according to claim 2, wherein a heat insulating part is provided between the booster circuit and the battery.   The radiation generating apparatus according to claim 1, further comprising a carriage on which the support column and the battery are mounted.

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