WO2018092174A1 - X線発生装置及びx線撮影システム - Google Patents
X線発生装置及びx線撮影システム Download PDFInfo
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- WO2018092174A1 WO2018092174A1 PCT/JP2016/004908 JP2016004908W WO2018092174A1 WO 2018092174 A1 WO2018092174 A1 WO 2018092174A1 JP 2016004908 W JP2016004908 W JP 2016004908W WO 2018092174 A1 WO2018092174 A1 WO 2018092174A1
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- optical fiber
- fiber cable
- ray
- coating
- drive circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/02—Constructional details
- H05G1/04—Mounting the X-ray tube within a closed housing
- H05G1/06—X-ray tube and at least part of the power supply apparatus being mounted within the same housing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4417—High voltage aspects, e.g. in cladding
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4417—High voltage aspects, e.g. in cladding
- G02B6/442—Insulators
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/26—Measuring, controlling or protecting
- H05G1/30—Controlling
- H05G1/32—Supply voltage of the X-ray apparatus or tube
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/26—Measuring, controlling or protecting
- H05G1/30—Controlling
Definitions
- the present invention relates to an X-ray generator and an X-ray imaging system.
- An X-ray imaging system is known as one of industrial nondestructive inspection devices.
- an X-ray inspection apparatus equipped with a microfocus X-ray tube is used for inspection of electronic devices typified by a semiconductor integrated circuit substrate.
- the X-ray tube emits X-rays from the target by applying a high voltage with a predetermined potential difference according to the X-ray energy between the anode and the cathode and irradiating the target with electrons accelerated by this high voltage.
- X-ray source is known as one of industrial nondestructive inspection devices.
- an X-ray inspection apparatus equipped with a microfocus X-ray tube is used for inspection of electronic devices typified by a semiconductor integrated circuit substrate.
- the X-ray tube emits X-rays from the target by applying a high voltage with a predetermined potential difference according to the X-ray energy between the anode and the cathode and irradiating the target with electrons accelerated by this high voltage.
- the microfocus X-ray tube is an X-ray tube having a plurality of grid electrodes on the cathode side, and has a function of converging an electron beam trajectory by controlling an electrostatic lens with a voltage applied to the grid electrodes. Yes.
- the X-ray tube grounding method and the control signal supply method are devised because of the necessity of controlling the voltage applied to the grid electrode.
- a negative high voltage is applied to the cathode of the X-ray tube by supplying a control signal of the grid voltage applied to the grid electrode via an optical fiber cable. Can be applied.
- the voltage applied between the envelope and the anode by adopting a neutral point grounding method in which the envelope of the X-ray tube is set to the ground potential and a positive and negative high voltage is applied to the anode and the cathode. Is reduced to about half.
- a control unit that communicates with a circuit, and at least the X-ray tube, the drive circuit, and the voltage generation circuit are arranged in a storage container filled with insulating oil. And at least a part of a path connecting the drive circuit and the control unit is configured by an optical fiber cable disposed in the storage container, and the optical fiber cable is configured to drive the voltage generation circuit.
- an X-ray generator having a coating that suppresses rocking due to the convection of the insulating oil that sometimes occurs.
- An X-ray generator manufacturing method in which at least a part of a path connecting the drive circuit and the control unit is configured by an optical fiber cable disposed in the storage container, The step of installing the X-ray tube, the drive circuit, the voltage generation circuit, and the optical fiber cable, and the step of curing the coating of the optical fiber cable installed in the storage container. Manufacturing method of wire generator There is provided.
- the oscillation of the optical fiber cable due to the convection of the insulating oil can be suppressed, and malfunction of the control system can be reduced.
- the X-ray generator can be further downsized and the applied voltage can be increased.
- a highly reliable X-ray imaging system capable of stably acquiring a captured image can be realized.
- FIG. 1 is a block diagram showing a schematic configuration of the X-ray generator according to the present embodiment.
- FIG. 2 is a schematic view showing an example of the structure of an optical fiber cable.
- FIG. 3 is a flowchart showing the manufacturing method of the X-ray generator according to the present embodiment.
- the X-ray generator 100 includes an X-ray tube 20, a high voltage generation circuit 30, an electron gun drive circuit 40, and a control unit 50.
- the X-ray tube 20, the high voltage generation circuit 30, and the electron gun drive circuit 40 are disposed in the storage container 10.
- the storage container 10 is filled with an insulating oil 80 in order to ensure a withstand voltage between the parts disposed therein.
- the insulating oil 80 is preferably an electric insulating oil such as mineral oil, silicone oil, or fluorine oil. Mineral oil that is easy to handle is preferably applied to the X-ray generator using the X-ray tube 20 having a rated tube voltage of about 100 kV.
- the X-ray tube 20 includes an electron source 22, a grid electrode 26, and an anode 28.
- the electron source 22 and the grid electrode 26 are connected to an electron gun drive circuit 40, and a desired control voltage is applied to each.
- the anode 28 is connected to the storage container 10 held at the ground potential.
- the anode 28 is provided with a target (not shown) that generates X-rays when irradiated with an electron beam. Although only one grid electrode 26 is shown in FIG. 1, a plurality of grid electrodes 26 are typically provided.
- the electron source 22 is not particularly limited.
- a hot cathode such as a tungsten filament or an impregnated cathode, or a cold cathode such as a carbon nanotube can be applied.
- the material constituting the target is preferably a material having a high melting point and high X-ray generation efficiency.
- tungsten, tantalum, molybdenum, and alloys thereof can be applied.
- the electron source 22 and the grid electrode 26 may be collectively referred to as an “electron gun”.
- X-rays are emitted from the target by accelerating the electrons emitted from the electron source 22 with a high voltage between the electron source 22 and colliding with the target provided on the anode 28.
- the X-ray dose radiated from the target can be controlled by the electron dose applied to the target, that is, the current supplied in the case of the hot cathode type electron source 22.
- the trajectory of the electron beam applied to the target can be controlled by the grid voltage applied to the grid electrode 26. In this sense, the electron source 22 and the grid electrode 26 are control mechanisms that control the electron beam emitted from the electron gun.
- the high voltage generation circuit 30 includes a step-up transformer 32 and a step-up circuit 34.
- the booster circuit 34 is, for example, a cockcroft circuit.
- the high voltage generation circuit 30 generates a negative high voltage with respect to the storage container 10 held at the ground potential.
- the high voltage generation circuit 30 is connected to the electron gun drive circuit 40.
- the electron gun drive circuit 40 includes a rectifier circuit 42, a logic circuit 44, an electron source drive circuit 46, and a grid voltage control circuit 48.
- the rectifier circuit 42 is connected to the logic circuit 44, the electron source drive circuit 46, and the grid voltage control circuit 48.
- the voltage supplied to the rectifier circuit 42 via the high-insulation transformer 36 can be rectified and supplied to the logic circuit 44, the electron source drive circuit 46, and the grid voltage control circuit 48.
- One input terminal of the rectifier circuit 42 is connected to the output terminal of the high voltage generation circuit 30. That is, in each circuit of the electron gun drive circuit 40, the negative potential supplied from the high voltage generation circuit 30 becomes the reference potential of the electron gun drive circuit 40.
- the electron source drive circuit 46 controls the voltage or current supplied to the electron source 22 in accordance with a control signal supplied from the control circuit 52 via the logic circuit 44.
- the grid voltage control circuit 48 controls the grid voltage applied to the grid electrode 26 in accordance with a control signal supplied from the control circuit 52 via the logic circuit 44.
- the control unit 50 includes a control circuit 52 and an inverter circuit 54.
- the control circuit 52 is connected to the electron gun drive circuit 40 and the inverter circuit 54.
- the inverter circuit 54 includes an inverter 56 connected to the step-up transformer 32 disposed in the storage container 10 and an inverter 58 connected to the high-insulation transformer 36 disposed in the storage container 10.
- the control circuit 52 supplies a predetermined control signal to the electron gun drive circuit 40 and the inverter circuit 54.
- the inverter circuit 54 controls the inverters 56 and 58 according to the control signal supplied from the control circuit 52, and supplies a predetermined drive voltage to the step-up transformer 32 and the high-insulation transformer 36.
- the control circuit 52 monitors the output voltage of the high voltage generation circuit 30, and controls the drive voltage of the step-up transformer 32 by a control signal supplied to the inverter circuit 54 so that the output voltage of the high voltage generation circuit 30 becomes a predetermined voltage. adjust.
- control unit 50 and the high voltage generation circuit 30 are connected via a step-up transformer 32, that is, insulated.
- the control unit 50 and the electron gun drive circuit 40 are connected, that is, insulated, via a high-insulation transformer 36.
- the control unit 50 is connected to the ground potential.
- the electron gun drive circuit 40 is connected to the high voltage generation circuit 30. Therefore, a potential difference corresponding to the negative high voltage generated by the high voltage generation circuit 30 is generated between the control unit 50 and the electron gun drive circuit 40 via the step-up transformer 32. That is, an electric field is generated between the control unit 50 and the electron gun drive circuit 40.
- At least a part of the path within the storage container 10 is configured by the optical fiber cable 60 in order to maintain electrical insulation.
- an electron source drive circuit 46 in the electron gun drive circuit 40 that operates using the negative potential supplied from the high voltage generation circuit 30 as a reference voltage by a control signal from the control circuit 52 that operates using the ground potential as the reference potential.
- the grid voltage control circuit 48 can be controlled.
- the optical fiber cable 60 is connected to the control circuit 52 and the logic circuit 44 via the photoelectric conversion element 74.
- the reference potential is a potential treated as a reference in each circuit.
- the coating material of the optical fiber cable 60 suppresses the swing of the optical fiber cable 60 due to the convection of the insulating oil 80 when the X-ray generator 100 is driven. It is made of a material having sufficient rigidity.
- the insulating oil 80 around the high voltage generating circuit 30 is locally charged and electrically Convection by hydrodynamic (EHD: Electro Hydro Dynamics) effect.
- EHD Electro Hydro Dynamics
- This convection increases as the electric field strength increases, that is, with the progress of miniaturization of the X-ray generator and higher applied voltage.
- the flow rate of the insulating oil 80 increases, the swing of the flexible optical fiber cable 60 increases, and in some cases, a communication error between the control unit 50 and the electron gun drive circuit 40 occurs. Since the convection of the insulating oil 80 is randomly generated in the storage container 10, it is difficult to suppress the influence of the convection by devising the arrangement of the optical fiber cable 60.
- the coating of the optical fiber cable 60 is sufficiently swung by the convection of the insulating oil 80 when the X-ray generator 100 is driven. It is comprised with the material which has the rigidity which can be restrained to.
- the optical fiber cable 60 is not flexible at the time of manufacturing the X-ray generator 100, it is difficult to install each part in the storage container 10 and to connect the optical fiber cable 60, which hinders assembly. Is also envisaged.
- the coating material of the optical fiber cable 60 is made of a material that has flexibility at the time of assembly but can be cured by subsequent processing. Then, the coating material is cured after assembly to increase the rigidity of the optical fiber cable 60, thereby suppressing the swing of the optical fiber cable 60 due to the convection of the insulating oil 80.
- the coating material of the optical fiber cable 60 after curing is substantially the same as the configuration of the optical fiber cable 60 when the high voltage generation circuit 30 is not driven, and the configuration of the optical fiber cable 60 when the high voltage generation circuit 30 is driven. It is comprised so that it may maintain in the same form.
- the substantially same form is the form when the high voltage generation circuit 30 is driven and the form when the high voltage generation circuit 30 is not driven, and the influence on the signal propagating through the optical fiber cable 60, for example, the occurrence rate of communication errors It means that etc. do not change.
- a resin material containing a plasticizer is used as a covering material for the optical fiber cable 60 having such properties.
- a resin material containing a plasticizer loses flexibility and is cured by leaching of the plasticizer.
- the X-ray generator is assembled in a state where the resin material constituting the coating material of the optical fiber cable 60 includes a plasticizer and has flexibility, and then the plasticizer is removed and cured without causing any trouble in the assembly.
- the rigidity of the optical fiber cable 60 can be increased during driving.
- the plasticizer added to the resin material is leached, generally, a countermeasure is taken so that the plasticizer is not leached to the outside.
- the plasticizer added to the resin material is deliberately leached into the insulating oil, so that the optical fiber cable 60 is cured and the optical fiber cable 60 is swung by the convection of the insulating oil 80. Is suppressed.
- the optical fiber cable 60 includes an optical fiber 70 in which an optical fiber 66 composed of a core 62 and a cladding 64 is coated with a resin material 68, and a primary coating composed of tensile strength fibers such as glass fiber. 72 and a secondary coating 74 made of a resin material.
- the secondary coating 74 as the outer cover can be made of a resin material containing a plasticizer.
- the outer sheath (secondary coating 74) of the optical fiber cable 60 may be coated with a resin material containing a plasticizer.
- the resin material constituting the coating material of the optical fiber cable 60 is not particularly limited, and for example, a polyvinyl chloride resin can be applied. Further, the plasticizer added to the resin material is not particularly limited as long as it can promote leaching from the resin material by the treatment described later. As a plasticizer added to the polyvinyl chloride resin, for example, DEHP (dioctyl phthalate) or DINP (diisononyl phthalate) of phthalates can be applied.
- DEHP dioctyl phthalate
- DINP diisononyl phthalate
- the rigidity required for the optical fiber cable 60 depends on the flow velocity of the insulating oil 80 that changes in accordance with the voltage applied to the X-ray tube 20, the length of the optical fiber cable 60, and the like. Can not. It is desirable to check the flow rate of the insulating oil 80 at the time of driving in advance, and to select an appropriate coating material for the optical fiber cable so that rigidity that does not swing can be realized by the cured optical fiber cable 60 at that time. .
- the rigidity of the optical fiber cable after curing can be adjusted by, for example, the resin material, the thickness of the coating, the amount of plasticizer added in advance, and the like.
- the rigidity at which the optical fiber cable 60 does not swing means sufficient rigidity to prevent a communication error in communication via the optical fiber cable 60. As long as a communication error due to the swing of the optical fiber cable 60 does not occur, the swing of the optical fiber cable 60 may not be completely prevented.
- a method of removing the plasticizer from the resin material constituting the coating material of the optical fiber cable 60 and curing it a method of applying a high voltage to the optical fiber cable 60 in the insulating oil 80 can be suitably used.
- a high voltage is applied to a resin material containing a plasticizer in insulating oil, leaching of the plasticizer from the resin material is promoted. That is, the optical fiber cable 60 can be cured by applying a voltage to the optical fiber cable 60 for a predetermined time in the storage container filled with the insulating oil 80.
- a potential difference is generated between the electron gun drive circuit 46 and the control circuit 52 which are connection paths by the optical fiber cable 60 during operation. Since a voltage is applied to the optical fiber cable 60 disposed between the electron gun drive circuit 46 and the control circuit 52 due to the potential difference between the electron gun drive circuit 46 and the control circuit 52, the plasticizer is leached from the resin material of the optical fiber cable 60 by this voltage. Can be promoted. That is, in the X-ray generator according to the present embodiment, the covering material of the optical fiber cable 60 can be cured by using the function of the X-ray generator as it is without using any additional means.
- the manufacturing method of the X-ray generator according to the present embodiment will be described with reference to FIG.
- the X-ray generator according to the present embodiment can be manufactured according to the flow shown in FIG.
- each part of the X-ray generator is prepared (step S101).
- the optical fiber cable 60 one in which the coating material is made of a resin material containing a plasticizer is prepared.
- step S102 the coating material of the optical fiber cable 60 is made of a resin material including a plasticizer and has flexibility, each part can be easily installed and the optical fiber cable 60 can be easily connected.
- the storage container 10 is filled with insulating oil 80 (step S103).
- insulating oil 80 it is preferable to apply a vacuum impregnation method in which the insulating oil 80 is injected after the storage container 10 is evacuated.
- the high voltage generating circuit 30 is driven, and a potential difference is formed between the electron gun driving circuit 46 and the control circuit 52. Due to this potential difference, a voltage is applied to the optical fiber cable 60, the plasticizer is dissolved out of the resin material covering the optical fiber cable 60, and the coating of the optical fiber cable 60 is cured (step S104).
- the coating treatment of the optical fiber cable 60 can be performed at the same time as the aging of the X-ray generator and the driving for the function inspection of each part.
- the voltage applied between the electron gun drive circuit 46 and the control circuit 52 when the optical fiber cable 60 is cured is not necessarily between the electron gun drive circuit 46 and the control circuit 52 when X-rays are generated. It need not be the same as the applied voltage.
- the voltage applied between the electron gun drive circuit 46 and the control circuit 52 can be appropriately set to a value suitable for curing the optical fiber cable 60 and generating X-rays.
- the curing process of the optical fiber cable 60 it is not always necessary to dissolve all the plasticizers contained in the coating of the optical fiber cable 60.
- the hardness of the coating increases with the progress of leaching of the plasticizer, and a desired rigidity may be realized by leaching only a part of the plasticizer.
- the plasticizer may remain in the coating after the curing treatment.
- the curing process of the optical fiber cable 60 may be performed while monitoring the shaking (hardness) of the optical fiber cable 60, and the curing process may be stopped when the desired hardness is exceeded.
- the time required for the curing process of the optical fiber cable 60 varies depending on the voltage applied to the optical fiber cable 60, the composition of the coating, etc., but cannot be generally specified, but is typically about several hours.
- the X-ray generator may be controlled so as to stop the generation of X-rays.
- a drive mode for driving the high voltage generation circuit 30 without generating X-rays is installed as a drive mode of the X-ray generator executed under the control of the control unit 50. You may make it do.
- the state in which X-rays are not generated can be controlled by, for example, a voltage applied to the grid electrode 26.
- a voltage applied to the grid electrode 26 For example, by switching the voltage applied to the grid electrode 26, electrons generated in the electron source 22 can stay between the electron source 22 and the grid electrode 26 or reach the anode.
- the state in which X-rays are not generated can be realized by performing control to remain between the electron source 22 and the grid electrode 26.
- the rigidity of the optical fiber cable 60 is increased and the swing of the optical fiber cable 60 due to the convection of the insulating oil 80 is suppressed, so that the malfunction of the control system can be reduced.
- the X-ray generator can be further downsized and the applied voltage can be increased.
- FIG. 4 is a schematic view showing the structure of the optical fiber cable of the X-ray generator according to the present embodiment.
- FIG. 5 is a flowchart showing the manufacturing method of the X-ray generator according to the present embodiment.
- the X-ray generator according to the present embodiment is the same as the X-ray generator according to the first embodiment except that the configuration of the optical fiber cable 60 is different. That is, in the X-ray generator according to the present embodiment, the outer peripheral portion of the optical fiber cable 60 is provided with a coating made of an epoxy resin.
- An epoxy resin is a thermosetting resin that cures when mixed with a curing agent. Immediately after mixing the epoxy resin and the curing agent, it has flexibility, but it is rigid enough to withstand the oscillation of the optical fiber cable 60 due to the convection of the insulating oil 80 by curing over time. The cured epoxy resin has oil resistance and does not react with the insulating oil 80 and become soft. Therefore, by coating the optical fiber cable 60 with an epoxy resin, it is possible to suppress the oscillation of the optical fiber cable 60 due to the convection of the insulating oil 80 during the operation of the X-ray generator, and to prevent the control system from malfunctioning. .
- the coating 76 made of epoxy resin may be provided so as to cover the outer sheath (secondary coating 74) of the optical fiber cable 60, or the outer sheath (for example, the secondary coating 74) of the optical fiber 66. ) May be provided.
- the epoxy resin coating 76 is not necessarily provided on the entire outer peripheral portion of the optical fiber cable 60 as long as desired rigidity can be imparted to the optical fiber cable 60. Further, it is not always necessary to be provided over the entire length of the optical fiber cable 60.
- the manufacturing method of the X-ray generator according to the present embodiment will be described with reference to FIG.
- the X-ray generator according to the present embodiment can be manufactured according to the flow shown in FIG.
- each part of the X-ray generator is prepared (step S201).
- step S202 the optical fiber cable 60 is installed in a predetermined place of the storage container 10 after the epoxy resin mixed with the curing agent is coated and before the epoxy resin is cured. Since the optical fiber cable 60 has flexibility before the epoxy resin is cured, each part can be easily installed and the optical fiber cable 60 can be connected.
- the coating of the epoxy resin provided on the optical fiber cable is cured by the progress of the cross-linking network by the epoxy group over time (step S203).
- the container 10 is filled with insulating oil 80 (step S103).
- insulating oil 80 it is preferable to apply a vacuum impregnation method in which the insulating oil 80 is injected after the storage container 10 is evacuated.
- the optical fiber cable 60 By curing the optical fiber cable 60 in this way, the swing of the optical fiber cable 60 due to the convection of the insulating oil 80 during the operation of the X-ray generator can be suppressed, and malfunction of the control system can be prevented.
- the rigidity of the optical fiber cable 60 is increased and the swing of the optical fiber cable 60 due to the convection of the insulating oil 80 is suppressed, so that the malfunction of the control system can be reduced.
- the X-ray generator can be further downsized and the applied voltage can be increased.
- FIG. 5 is a flowchart showing the manufacturing method of the X-ray generator according to the present embodiment.
- the X-ray generator according to this embodiment is the same as the X-ray generator according to the first and second embodiments except that the configuration of the optical fiber cable 60 is different. That is, in the X-ray generator according to the present embodiment, the outer peripheral portion of the optical fiber cable 60 is provided with a coating made of a photocurable resin.
- Photo-curing resin is a resin material that cures when irradiated with energy rays such as ultraviolet rays. Although it has flexibility before irradiation with energy rays, it has sufficient rigidity to suppress oscillation of the optical fiber cable 60 due to convection of the insulating oil 80 by curing. Therefore, by coating the optical fiber cable 60 with a photo-curing resin, it is possible to suppress the oscillation of the optical fiber cable 60 due to the convection of the insulating oil 80 during the operation of the X-ray generator, and to prevent the control system from malfunctioning. it can.
- the coating 76 made of a photo-curing resin may be provided so as to cover the outer sheath (secondary coating 74) of the optical fiber cable 60, or the outer sheath (for example, secondary coating) of the optical fiber 66. 74).
- the coating of the photo-curing resin is not necessarily provided on the entire outer peripheral portion of the optical fiber cable 60 as long as desired rigidity can be imparted to the optical fiber cable 60. Further, it is not always necessary to be provided over the entire length of the optical fiber cable 60.
- the manufacturing method of the X-ray generator according to the present embodiment will be described with reference to FIG.
- the X-ray generator according to the present embodiment can be manufactured according to the flow shown in FIG.
- each part of the X-ray generator is prepared (step S201).
- step S202 the optical fiber cable 60 is installed in a predetermined place of the storage container 10 after coating the photo-curing resin and before curing the photo-curing resin. Since the optical fiber cable 60 has flexibility before the photo-curing resin is cured, each part can be easily installed and the optical fiber cable 60 can be connected.
- the optical fiber cable installed in the storage container 10 is irradiated with a predetermined energy ray, for example, ultraviolet rays, and the coating photo-curing resin is cured (step S203).
- a predetermined energy ray for example, ultraviolet rays
- the container 10 is filled with insulating oil 80 (step S103).
- insulating oil 80 it is preferable to apply a vacuum impregnation method in which the insulating oil 80 is injected after the storage container 10 is evacuated.
- the optical fiber cable 60 By curing the optical fiber cable 60 in this way, the swing of the optical fiber cable 60 due to the convection of the insulating oil 80 during the operation of the X-ray generator can be suppressed, and malfunction of the control system can be prevented.
- the rigidity of the optical fiber cable 60 is increased and the swing of the optical fiber cable 60 due to the convection of the insulating oil 80 is suppressed, so that the malfunction of the control system can be reduced.
- the X-ray generator can be further downsized and the applied voltage can be increased.
- FIG. 6 is a block diagram illustrating a schematic configuration of the X-ray imaging system according to the present embodiment.
- an X-ray imaging system using the X-ray generator according to the first to third embodiments is shown.
- the X-ray imaging system 200 includes an X-ray generation device 100, an X-ray detection device 110, a system control device 120, and a display device 130, as shown in FIG.
- the X-ray generator 100 is an X-ray generator according to any one of the first to third embodiments, and includes an X-ray tube 20 and an X-ray tube drive circuit 102.
- the X-ray tube drive circuit 102 includes a high voltage generation circuit 30, an electron gun drive circuit 40, a control unit 50, and the like in the X-ray generators of the first to third embodiments.
- the X-ray detection apparatus 110 includes an X-ray detector 112 and a signal processing unit 114.
- the system control device 120 controls the entire system including the X-ray generation device 100 and the X-ray detection device 110.
- the display device 130 displays the image signal processed by the system control device 120 on the screen.
- the X-ray tube drive circuit 102 of the X-ray generator 100 outputs various control signals to the X-ray tube 20 under the control of the system controller 120.
- the emission state of the X-rays emitted from the X-ray generator 100 is controlled by the control signal output from the system controller 120.
- the X-ray 104 emitted from the X-ray generator 100 passes through the subject 106 and is detected by the X-ray detector 112.
- the X-ray detector 112 includes a plurality of detection elements (not shown) and acquires a transmitted X-ray image.
- the X-ray detector 112 converts the acquired transmitted X-ray image into an image signal and outputs the image signal to the signal processing unit 114.
- a slit, a collimator, or the like may be arranged.
- the signal processing unit 114 performs predetermined signal processing on the image signal under the control of the system control device 120, and outputs the processed image signal to the system control device 120. Based on the processed image signal, the system control device 120 outputs a display signal to the display device 130 in order to display an image on the display device 130.
- the display device 130 displays a captured image of the subject 106 based on the display signal on the screen.
- the present embodiment it is possible to stably acquire a captured image by using the X-ray generator 100 according to the first to third embodiments that is small and has excellent discharge withstand voltage characteristics.
- a highly reliable X-ray imaging system 200 can be realized.
- the grounding method of the X-ray tube 20 is the anode grounding method, but the grounding method of the X-ray tube 20 is not limited to the anode grounding method.
- a neutral point grounding system in which positive and negative high voltages are respectively applied to the anode and cathode of the X-ray tube may be employed.
- the electron gun drive circuit 46 is not necessarily used.
- the control circuit 52 need not be configured to generate a potential difference.
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Abstract
Description
また、本発明の他の一観点によれば、X線管と、前記X線管を駆動する駆動回路と、前記X線管に印加する電子加速電圧を生成する電圧発生回路と、前記駆動回路及び前記電圧発生回路と通信する制御部と、を有し、少なくとも、前記X線管と、前記駆動回路と、前記電圧発生回路とが、絶縁油が充填された収納容器内に配されており、前記駆動回路と前記制御部とを接続する経路の少なくとも一部が、前記収納容器内に配された光ファイバケーブルにより構成されたX線発生装置の製造方法であって、前記収納容器内に、前記X線管と、前記駆動回路と、前記電圧発生回路と、前記光ファイバケーブルとを設置するステップと、前記収納容器内に設置した前記光ファイバケーブルの被覆を硬化するステップとを有するX線発生装置の製造方法が提供される。
本発明の第1実施形態によるX線発生装置について、図1乃至図3を用いて説明する。図1は、本実施形態によるX線発生装置の概略構成を示すブロック図である。図2は、光ファイバケーブルの構造の一例を示す概略図である。図3は、本実施形態によるX線発生装置の製造方法を示すフローチャートである。
本発明の第2実施形態によるX線発生装置について、図4及び図5を用いて説明する。第1実施形態と同様の構成要素には同一の符号を付し、説明を省略し或いは簡潔にする。図4は、本実施形態によるX線発生装置の光ファイバケーブルの構造を示す概略図である。図5は、本実施形態によるX線発生装置の製造方法を示すフローチャートである。
本発明の第3実施形態によるX線発生装置について、図5を用いて説明する。第1及び第2実施形態と同様の構成要素には同一の符号を付し、説明を省略し或いは簡潔にする。図5は、本実施形態によるX線発生装置の製造方法を示すフローチャートである。
本発明の第4実施形態によるX線撮影システムについて、図6を用いて説明する。図6は、本実施形態によるX線撮影システムの概略構成を示すブロック図である。
本発明は、上記実施形態に限らず種々の変形が可能である。
20…X線管
22…電子源
26…グリッド電極
28…陽極
30…高電圧発生回路
40…電子銃駆動回路
50…制御部
52…制御回路
60…光ファイバケーブル
66…光ファイバ
72…1次被覆
74…2次被覆
76…被覆
80…絶縁油
Claims (8)
- X線管と、前記X線管を駆動する駆動回路と、前記X線管に印加する電子加速電圧を生成する電圧発生回路と、前記駆動回路及び前記電圧発生回路と通信する制御部と、を有し、少なくとも、前記X線管と、前記駆動回路と、前記電圧発生回路とが、絶縁油が充填された収納容器内に配されたX線発生装置であって、
前記駆動回路と前記制御部とを接続する経路の少なくとも一部が、前記収納容器内に配された光ファイバケーブルにより構成されており、
前記光ファイバケーブルは、前記電圧発生回路の駆動時に生じる前記絶縁油の対流により揺動することを抑制する被覆を有する
ことを特徴とするX線発生装置。 - 前記被覆は、可塑剤を含む樹脂材料から、前記可塑剤の少なくとも一部を溶脱することにより硬化したものであり、
前記制御部は、X線を発生させない状態で、前記電圧発生回路を駆動して、前記光ファイバケーブルに所定時間電圧を印加することにより、前記可塑剤の溶脱を促すように構成されている
ことを特徴とする請求項1記載のX線発生装置。 - 前記被覆は、エポキシ樹脂又は光硬化樹脂からなる
ことを特徴とする請求項1記載のX線発生装置。 - X線管と、前記X線管を駆動する駆動回路と、前記X線管に印加する電子加速電圧を生成する電圧発生回路と、前記駆動回路及び前記電圧発生回路と通信する制御部と、を有し、少なくとも、前記X線管と、前記駆動回路と、前記電圧発生回路とが、絶縁油が充填された収納容器内に配されており、前記駆動回路と前記制御部とを接続する経路の少なくとも一部が、前記収納容器内に配された光ファイバケーブルにより構成されたX線発生装置の製造方法であって、
前記収納容器内に、前記X線管と、前記駆動回路と、前記電圧発生回路と、前記光ファイバケーブルとを設置するステップと、
前記収納容器内に設置した前記光ファイバケーブルの被覆を硬化するステップと
を有することを特徴とするX線発生装置の製造方法。 - 前記被覆を硬化するステップの前に、前記収納容器内に前記絶縁油を充填するステップを更に有し、
前記被覆を硬化するステップでは、前記駆動回路を駆動しない状態で、前記電圧発生回路を駆動し、可塑剤を含む樹脂材料からなる被覆を有する前記光ファイバケーブルに所定時間電圧を印加し、前記被覆から前記可塑剤を溶脱することにより、前記被覆を硬化する
ことを特徴とする請求項4記載のX線発生装置の製造方法。 - 前記光ファイバケーブルを設置するステップは、前記光ファイバケーブルに、エポキシ樹脂の被覆を形成するステップと、前記エポキシ樹脂が硬化する前に前記光ファイバケーブルを前記収納容器内に設置するステップと、を有し、
前記被覆を硬化するステップは、前記エポキシ樹脂を硬化するステップである
ことを特徴とする請求項4記載のX線発生装置の製造方法。 - 前記光ファイバケーブルを設置するステップは、前記光ファイバケーブルに、光硬化樹脂の被覆を形成するステップと、前記被覆を形成した前記光ファイバケーブルを前記収納容器内に設置するステップと、を有し、
前記被覆を硬化するステップでは、前記被覆に、前記光硬化樹脂を硬化するエネルギー線を照射する
ことを特徴とする請求項4記載のX線発生装置の製造方法。 - 請求項1乃至3のいずれか1項に記載のX線発生装置と、
前記X線発生装置から放出されて被検体を透過したX線を検出するX線検出装置と、
前記X線検出装置により検出された前記被検体の透過X線像を画像信号に変換する信号処理部と
を有することを特徴とするX線撮影システム。
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EP16921967.2A EP3544390B1 (en) | 2016-11-17 | 2016-11-17 | X-ray generator and method of manufacturing thereof |
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TW106138241A TWI645746B (zh) | 2016-11-17 | 2017-11-06 | X光產生裝置及x光攝影系統 |
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EP3544390A4 (en) | 2020-06-17 |
US9980357B1 (en) | 2018-05-22 |
US10631390B2 (en) | 2020-04-21 |
US20180139828A1 (en) | 2018-05-17 |
JPWO2018092174A1 (ja) | 2018-11-15 |
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EP3544390A1 (en) | 2019-09-25 |
CN109983847A (zh) | 2019-07-05 |
US20180242439A1 (en) | 2018-08-23 |
CN109983847B (zh) | 2023-02-17 |
JP6190563B1 (ja) | 2017-08-30 |
KR102252812B1 (ko) | 2021-05-18 |
EP3544390B1 (en) | 2021-09-22 |
TWI645746B (zh) | 2018-12-21 |
TW201828777A (zh) | 2018-08-01 |
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