WO2018078676A1 - 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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- WO2018078676A1 WO2018078676A1 PCT/JP2016/004771 JP2016004771W WO2018078676A1 WO 2018078676 A1 WO2018078676 A1 WO 2018078676A1 JP 2016004771 W JP2016004771 W JP 2016004771W WO 2018078676 A1 WO2018078676 A1 WO 2018078676A1
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- Prior art keywords
- optical fiber
- fiber cable
- ray
- ray generator
- drive circuit
- Prior art date
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Images
Classifications
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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
-
- 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
- H05G1/54—Protecting or lifetime prediction
-
- 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
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- 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
- G02B6/4429—Means specially adapted for strengthening or protecting the 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
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
-
- 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
-
- 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
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4274—Electrical aspects
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
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 by 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.
- an X-ray tube a drive circuit that drives the X-ray tube, a voltage generation circuit that generates an electron acceleration voltage to be applied to the X-ray tube, and a control that communicates with the drive circuit
- An X-ray generator wherein at least the X-ray tube, the drive circuit, and the voltage generation circuit are arranged in a storage container filled with insulating oil, wherein the drive At least a part of a path connecting the circuit and the control unit is configured by an optical fiber cable disposed in the storage container, and the optical fiber cable is provided between the drive circuit and the control unit.
- an X-ray generator having an electric field relaxation means for suppressing an electric field generated by a potential difference from being locally concentrated along the length direction of the optical fiber cable.
- the present invention local concentration of the electric field along the length direction of the optical fiber cable that propagates the control signal for controlling the X-ray tube can be suppressed, and malfunction of the control system can be reduced. This makes it possible to further reduce the size of the X-ray generator and increase the applied voltage. In addition, by using such an X-ray generator, 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 diagram showing a structure of a connection portion of an optical fiber cable that connects the control circuit and the electron gun drive circuit.
- FIG. 3 is a diagram for explaining the influence of residual gas in the optical fiber cable.
- FIG. 4 is a schematic view showing the structure of the optical fiber cable 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 negative high voltage generated by the high voltage generation circuit 30 is applied 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.
- the optical fiber cable 60 is configured by the optical fiber cable 60 in order to maintain electrical insulation.
- the 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 the reference potential by the 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 optical fiber cable 60 has electric field relaxation means for suppressing local concentration of the electric field along the length direction thereof.
- electric field relaxation said here means relaxation of electric field strength.
- the optical fiber cable 60 includes an optical connector 62 at an end thereof, and is optically connected to an optical connector 72 provided on the circuit board 70.
- the optical connector 72 provided on the circuit board 70 includes a photoelectric conversion element 74, which converts an electrical signal into an optical signal and outputs the optical signal to the optical fiber cable 60, or an optical signal from the optical fiber cable 60. Convert to electrical signal.
- the sealing structure 76 is provided so as to seal a connection portion between the optical connector 62 provided on the optical fiber cable 60 and the optical connector 72 provided on the circuit board 70.
- the sealing structure 76 is for preventing the insulating oil from penetrating into the optical connection portion between the optical fiber cable 60 and the photoelectric conversion element 74 and the inside of the coating of the optical fiber cable 60.
- the sealing structure 76 provided in this way corresponds to the electric field relaxation means in the optical fiber cable 60 of the present embodiment.
- the sealing structure 76 can be formed by applying and curing a resin material such as an epoxy resin.
- a typical optical fiber cable has a structure in which a coating is provided on the outer periphery of an optical fiber composed only of a core and a clad.
- a gas may exist between the optical fiber and the coating.
- gas is present in the primary coating.
- the insulating oil 80 permeates into the inside of the coating of the optical fiber cable 60, and the inside of the optical fiber cable 60. In some cases, gas remains locally.
- the electric field concentrates on the portion and a partial discharge is generated, and a high-frequency current following a sudden change in capacity is controlled through the circuit board 70 on the ground potential side. It flows to the circuit 52 and causes a malfunction of the control system.
- FIG. 3 is a diagram schematically showing an electric field distribution along the length direction of the optical fiber cable 60 when a residual gas is locally present in the optical fiber cable 60.
- FIG. 3A shows a state in which the insulating oil 80 is infiltrated between the optical fiber 64 and the coating 66 of the optical fiber cable 60 and the gas 82 remains in part.
- FIG. 3B shows an equivalent circuit at this time.
- the X-ray generator seals the connection portion between the optical connector 62 provided on the optical fiber cable 60 and the optical connector 72 provided on the circuit board 70 so as to be sealed.
- a stop structure 76 is provided.
- the material constituting the coating (outer skin) of the optical fiber cable 60 and the sealing structure 76 has a high voltage in the insulating oil 80. It is desirable that the material does not change even when added.
- the material that does not change even when a high voltage is applied in the insulating oil 80 include a resin material that does not contain a plasticizer, such as a fluororesin such as an epoxy resin or polytetrafluoroethylene.
- the sealing structure 76 is provided at the connection portion between the optical connector 62 and the optical connector 72, local concentration of the electric field along the length direction of the optical fiber cable 60 is reduced. It is possible to suppress the malfunction of the control system. As a result, the X-ray generator can be further downsized and the applied voltage can be increased.
- FIG. 5 is a schematic view showing the structure of the optical fiber cable of the X-ray generator according to the present embodiment.
- the optical fiber cable 60 is configured to prevent infiltration of the insulating oil 80 into the optical fiber cable 60.
- the configuration is such that the gas in the optical fiber cable 60 is positively replaced with the insulating oil 80. By doing so, local concentration of the electric field can be suppressed.
- the coating 66 is provided with an opening 68 that plays a role of exhausting gas and infiltrating the insulating oil 80. Yes.
- the opening 68 provided in this way corresponds to the electric field relaxation means in the optical fiber cable 60 of the present embodiment.
- the opening 68 in the coating 66 of the optical fiber cable 60 By providing the opening 68 in the coating 66 of the optical fiber cable 60, the exhaust of the gas in the optical fiber cable 60 and the penetration of the insulating oil 80 into the optical fiber cable 60 are promoted. It is possible to suppress the gas from remaining. Since the electric field concentration in the optical fiber cable 60 is caused by the residual gas locally, the residual gas in the optical fiber cable 60 is reduced, thereby suppressing the electric field concentration in the optical fiber cable 60 and thus controlling. System malfunction can be prevented.
- the location of the opening 68 is not particularly limited as long as the gas can be discharged from the optical fiber cable 60 and the insulating oil 80 can penetrate into the optical fiber cable 60.
- position in the middle of the optical fiber cable 60 may arrange
- the number and size of the openings 68 are within a range that does not impair the strength required for the optical fiber cable 60 so that the gas in the optical fiber cable 60 is quickly discharged and the insulating oil 80 can be easily infiltrated. It can be selected appropriately.
- the opening 68 is not necessarily provided in a part of the optical fiber cable 60 and may be provided so as to expose the entire optical fiber 64. That is, the coating 66 of the optical fiber cable 60 may be omitted.
- the insulating oil 80 is filled into the storage container 10 after the inside of the storage container 10 is evacuated. It is preferable to apply a vacuum impregnation method. By using the vacuum impregnation method, the gas in the optical fiber cable 60 can be easily and reliably replaced with the insulating oil 80.
- the formation method of the opening 68 is not particularly limited, and for example, it can be performed by a general method such as cutting the cover 66 with a cutter.
- the opening 66 that plays a role of gas discharge and infiltration of the insulating oil 80 is provided in the coating 66 of the optical fiber cable 60, and therefore, along the length direction of the optical fiber cable 60. Therefore, local concentration of the electric field can be suppressed, and malfunction of the control system can be reduced. As a result, the X-ray generator can be further downsized and the applied voltage can be increased.
- FIG. 6 is a schematic view showing the structure of the optical fiber cable of the X-ray generator according to the present embodiment.
- the coating (coating 66a) of the optical fiber cable 60 is made of a high resistance material.
- the electric field in the length direction of the optical fiber cable 60 can be made uniform by the electric field formed by the current flowing through the coating.
- the coating 66a made of a high resistance material corresponds to the electric field relaxation means in the optical fiber cable 60 of the present embodiment.
- the coating 66a is made of a high resistance material, a current corresponding to a value obtained by dividing the acceleration voltage of the electron beam by the resistance value of the coating 66a can flow through the coating 66a. It is possible to make the electric field uniform.
- the resistance value of the material constituting the coating 66a is set within a desirable range from the potential regulation and the power consumption.
- the sheet resistance of the coating 66a is preferably 10 14 ⁇ / ⁇ or less, more preferably 10 12 ⁇ / ⁇ or less, and most preferably 10 11 ⁇ / ⁇ or less from the viewpoint of potential regulation.
- the lower limit of the sheet resistance of the coating 66a because it depends on the length of the accelerating voltage and the optical fiber cable 60, to suppress the power consumption, preferably at 10 5 ⁇ / ⁇ or more, 10 7 ⁇ / ⁇ More preferably.
- the sheet resistance of the coating 66a can be set to about 5 ⁇ 10 10 ⁇ / ⁇ .
- the current that flows when the acceleration voltage is 100 kV is about 1 ⁇ A, which is also appropriate from the viewpoint of potential regulation and power consumption.
- the coating 66a made of a high resistance material is not particularly limited, and examples thereof include a resin material in which a carbon-based material such as carbon black is kneaded.
- the resistance value can be adjusted by adding the carbon-based material.
- the coating 66a of the optical fiber cable 60 is made of a high resistance material, local concentration of the electric field along the length direction of the optical fiber cable 60 is suppressed, and the control system Malfunction can be reduced. As a result, the X-ray generator can be further downsized and the applied voltage can be increased.
- FIG. 7 is a block diagram showing 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 coating 66 of the optical fiber cable 60 of the X-ray generator according to the first or second embodiment may be configured by the coating 66a of the third embodiment.
- 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 present invention can be widely applied to an X-ray generator having a configuration in which an optical fiber cable is included in a part of a propagation path of a control signal and a potential difference between both ends of the optical fiber cable is large.
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Abstract
Description
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4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、制御回路と電子銃駆動回路とを接続する光ファイバケーブルの接続部分の構造を示す図である。図3は、光ファイバケーブル内の残留気体の影響を説明する図である。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。
本発明の第2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。図5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。
本発明の第3実施形態によるX線発生装置について、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。
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7を用いて説明する。図7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
62,72…光コネクタ
64…光ファイバ
66,66a…被覆
68…開口部
74…光電変換素子
76…封止構造体
80…絶縁油
82…気体
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、前記駆動回路と前記制御部との間の電位差によって発生する電界が、前記光ファイバケーブルの長さ方向に沿って局所的に集中することを抑制するための電界緩和手段を有する
ことを特徴とするX線発生装置。 - 前記光ファイバケーブルは、光ファイバと、前記光ファイバを覆う被覆とを有し、
前記電界緩和手段は、前記被覆に設けられた開口部を有する
ことを特徴とする請求項1記載のX線発生装置。 - 前記開口部は、前記光ファイバケーブル内の気体の排出と、前記光ファイバケーブル内への前記絶縁油の滲入とを促進するように構成されており、前記光ファイバケーブル内の気体が前記絶縁油に置換されている
ことを特徴とする請求項2記載のX線発生装置。 - 前記経路は、前記光ファイバケーブルに光学的に接続された光電変換素子を有し、
前記電界緩和手段は、前記光ファイバケーブルと前記光電変換素子との接続部を密閉する封止構造体を有する
ことを特徴とする請求項1記載のX線発生装置。 - 前記光ファイバケーブルは、光ファイバと、前記光ファイバを覆う被覆とを有し、
前記封止構造体は、前記光ファイバケーブル内に前記絶縁油が滲入するのを防止する
ことを特徴とする請求項4記載のX線発生装置。 - 前記光ファイバケーブルは、光ファイバと、前記光ファイバを覆う高抵抗材料からなる被覆とを有し、
前記電界緩和手段は、前記被覆である
ことを特徴とする請求項1記載のX線発生装置。 - 前記被覆の抵抗値は、前記長さ方向に沿って前記被覆を流れる電流によって前記光ファイバケーブル内の電界の局所的な集中を緩和するように設定されている
ことを特徴とする請求項6記載のX線発生装置。 - 請求項1乃至7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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EP16919595.5A EP3534680A4 (en) | 2016-10-31 | 2016-10-31 | X-RAY GENERATOR AND RADIOGRAPHY SYSTEM |
KR1020197012859A KR102252811B1 (ko) | 2016-10-31 | 2016-10-31 | X선 발생 장치 및 x선 촬영 시스템 |
CN201680090535.XA CN109892018B (zh) | 2016-10-31 | 2016-10-31 | X射线产生装置和x射线拍摄系统 |
JP2018513562A JP6355876B1 (ja) | 2016-10-31 | 2016-10-31 | X線発生装置及びx線撮影システム |
PCT/JP2016/004771 WO2018078676A1 (ja) | 2016-10-31 | 2016-10-31 | X線発生装置及びx線撮影システム |
TW106137300A TWI653910B (zh) | 2016-10-31 | 2017-10-30 | X射線產生裝置及x射線攝影系統 |
US16/170,274 US10433410B2 (en) | 2016-10-31 | 2018-10-25 | X-ray generation apparatus and X-ray photography system |
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EP3997966A1 (en) * | 2019-07-09 | 2022-05-18 | Varex Imaging Corporation | Electron gun driver |
US11864300B2 (en) | 2021-04-23 | 2024-01-02 | Carl Zeiss X-ray Microscopy, Inc. | X-ray source with liquid cooled source coils |
US11961694B2 (en) * | 2021-04-23 | 2024-04-16 | Carl Zeiss X-ray Microscopy, Inc. | Fiber-optic communication for embedded electronics in x-ray generator |
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EP3534680A4 (en) | 2020-06-17 |
US10433410B2 (en) | 2019-10-01 |
US20190069384A1 (en) | 2019-02-28 |
JP6355876B1 (ja) | 2018-07-11 |
TWI653910B (zh) | 2019-03-11 |
TW201820935A (zh) | 2018-06-01 |
CN109892018A (zh) | 2019-06-14 |
JPWO2018078676A1 (ja) | 2018-10-25 |
EP3534680A1 (en) | 2019-09-04 |
KR102252811B1 (ko) | 2021-05-18 |
CN109892018B (zh) | 2023-06-09 |
KR20190058617A (ko) | 2019-05-29 |
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