Kabushiki Kaisha Toshiba

Toshiba Electron Tubes & Devices Co., Ltd.

Canon Electron Tubes & Devices Co., Ltd.

Toshiba Electron Tubes & Devices

Tokyo Shibaura Denki Kabushiki Kaisha

Hidero Anno

Katsuhiro Ono

Takayuki Kitami

Hiroyuki Sugiura

Hironori Nakamuta

Koichi Kitade

Manabu Sato

Tomonari Ishihara

Hiroaki Tazawa

Tetsuya Yonezawa

Naoki Takahashi

Hiroyuki Kumadaki

Hitoshi Hattori

Shin Saito

Masaji Kanagami

Makoto Tanaka

Norio Harao

Takashi Shimono

Hideki Ide

Harunobu Fukushima

Chiharu Tadokoro

Tetsu Sano

Masahiko Tezuka

Yukinari Yoshida

Tomonobu Saito

Miki Watanabe

Hidetaka Nakabayashi

Naoki Akahori

Hideo Yagoshi

Murashi Shinto

Minoru Shida

Yuichiro Kume

According to one embodiment, an X-ray tube, including a cathode including a filament including a leg portion extending from a coil to a distal portion and including a corner portion at the distal portion, a support terminal including a gap, and including an opening portion in which the gap is opened and a bottom portion located on a side opposite to the opening portion, and a cathode cup being connected to the support terminal, the distal portion being located in the gap, the support terminal including a protruding portion protruding in the gap, being located more closely to the bottom portion side than the distal portion, and being joined to the corner portion of the leg portion.

X-ray tube and method of manufacturing the same

According to one embodiment, a rotating anode X-ray tube including a rotating cylinder, a rotating shaft fixed to the inside of the rotating cylinder, an anode fixing body arranged between the rotating cylinder and the rotating shaft, extending in the axial direction, and constituted of one of a magnetic substance member formed of a magnetic substance and a heat-transfer enhancing member heat conductivity of which is higher than surrounding members, ball bearings, and an inner member, connected to the anode fixing body by a connecting member, and constituted of one of the magnetic substance member and the heat-transfer enhancing member, one being different from the member constituting the anode fixing body.

Rotating anode x-ray tube

According to one embodiment, an X-ray tube includes a cathode including a filament, an anode target, and an envelope. The cathode includes a metal lead wire supporter which is exposed outside the envelope, which is configured as a part of the envelope, and to which a lead wire as a power supplier to the filament is attached such that the lead wire passes both inside and outside of the envelope, and a metal filament supporter fixed on the lead wire supporter, being in contact with the lead wire supporter, and supporting the filament.

X-ray tube including support for latitude supply wires

According to one embodiment, a rotating-anode X-ray tube assembly includes a rotating-anode X-ray tube, a housing, a coolant, a first shell, an X-ray shielding member, a second shell and an air introduction unit. The first shell is provided apart from the housing and an envelope of the rotating-anode X-ray tube, and surrounds the envelope. The X-ray shielding member is provided between the first shell and the housing and apart from the housing. The second shell is provided apart from the housing to cause an airway to be formed between the second shell and the housing. The air introduction unit produces a flow of air in the airway.

Rotating-anode X-ray tube assembly with cooling system

According to one embodiment, an X-ray tube assembly includes a cathode includes a first non-magnetic metal member having high electrical conductivity, an anode target includes a second non-magnetic metal member having high electrical conductivity, a vacuum envelope having depressed portion depressed, and a first magnetic deflector provided outside the vacuum envelope, includes first magnetic pole pair generating the alternating magnetic field, the first magnetic pole pair being provided in close vicinity to a wall surface of the depressed portion.

X-ray tube assembly

According to one embodiment, an X-ray tube includes an envelope with an opening, an X-ray transmission assembly mounted on the envelope and vacuum-tightly blocking the opening, a cathode and an anode target. The X-ray transmission assembly includes a window frame, an X-ray transmission window, an X-ray-resistive resin film, a sealing member and a dry gas. The X-ray transmission window is formed of a beryllium thin plate, accommodated in the window frame, and configured to maintain, along with the window frame, a vacuum-tight state inside the envelope. The X-ray-resistive resin film forms a space inside along with the window frame and the X-ray transmission window. The dry gas fills the space.

According to one embodiment, an X-ray tube includes an anode target, a cathode including a filament and a convergence electrode which includes a groove portion, and an envelope. The groove portion includes a pair of first bottom surfaces which are located in the same plane as the filament and between which the filament is interposed in a width direction of the groove portion, and a pair of second bottom surfaces between which the filament and the pair of first bottom surfaces are interposed in a length direction of the groove portion and which are located closer to an opening of the groove portion than the pair of first bottom surfaces.

X-ray tube

According to one embodiment, a cooler includes a casing, a radiator unit which is installed in a circulation path, where a coolant is circulated, and is configured to externally discharge heat of the coolant, and a fan unit housed in the casing to generate an air flow passing through the radiator unit. A windward side of the radiator unit is exposed to an outer side of the casing.

Cooler, X-ray computed tomography apparatus, and maintenance method of X-ray computed tomography apparatus

According to one embodiment, an X-ray tube including an electron emission source which emits an electron, an anode target which comprises a target layer emitting an X-ray by the electron from the electron emission source, and a substrate supporting the target layer and composed from a carbide-strengthened molybdenum alloy, an evacuated outer surrounding envelope which contains the electron emission source and the anode target, a diffusion barrier layer which is integrally formed with the substrate by a powder metallurgy method on a part of a top surface of the substrate and is composed of a high-melting-point metal lacking of carbon-element content compared with carbon-element content in the substrate, and a thermal radiation film which is formed on at least a part of a top surface of the diffusion barrier layer and composed of metallic oxide.

X-ray tube and anode target

According to one embodiment, an X-ray tube assembly includes a housing, an X-ray tube, a coolant to which at least a part of heat generated by the X-ray tube is transferred, a circulation channel through which the coolant is circulated, a circulation pump, a radiator, an air filter and a fan unit. The air filter is formed of a three-dimensional nonwoven fabric that is formed of irregularly tangled resin fibers and provides a three-dimensional structure having a spatial volume ratio of not less than 93%. The air filter permits air to pass therethrough to eliminate dust from the air.

X-ray tube assembly and X-ray computerized tomography scanner

There is disclosed a rotating anode X-ray tube assembly includes a vacuum envelope integrated with an anode target, a housing receiving at least the vacuum envelope, and rotatably holding it, a circulation path circulating a cooling medium in a state of closing to at least anode target of the vacuum envelope, a cathode received and arranged in the vacuum envelope, a cathode support member supporting the cathode, a bearing mechanism and a vacuum sealing mechanism interposed between the vacuum envelope, and the housing or a stationary member direct or indirectly fixed to the housing, and a driver unit for rotating the vacuum envelope.

Rotating anode X-ray tube assembly

A supporting member supports an anode target at one end thereof and is provided with an attachment portion around the outer circumference of the other end. The attachment portion is attached to the inner circumferential surface of the cylindrical portion of the second vacuum envelope member so that the heat conductivity from the supporting member to the second vacuum envelope member can be improved by means of the attachment portion. A terminal is provided at the end surface portion on the side of the other end of the second vacuum envelope member for applying a voltage to the anode target. The terminal is positioned away from the attachment portion so that the temperature of the insulating material that insulates the terminal can be kept low and the insulating characteristics can be ensured over the long term.

An X-ray apparatus includes a rotation-anode type X-ray tube which is configured such that a rotatable anode target and a cathode that is disposed to be opposed to the anode target are accommodated within a vacuum envelope, a stator which generates an induction electromagnetic field for rotating the anode target, a housing which accommodates and holds at least the rotation-anode type X-ray tube, a circulation path which is provided near at least a part of the rotation-anode type X-ray tube, and through which a water-based coolant is circulated, and a cooling unit including a circulation pump, which is provided at a position along the circulation path and forcibly feeds the water-based coolant, and a radiator which radiates heat of the water-based coolant, wherein at least a part of a surface of a metallic component is coated with a coating member to prevent contacting with the water-based coolant.

X-ray apparatus

An X-ray examination method comprises setting a tube voltage of an X-ray tube to a tube voltage that makes an X-ray absorptance difference between a first X-ray propagation medium and a second X-ray propagation medium in an object become not more than 10%, applying an X-ray beam from the X-ray tube to the object while a tube voltage of the X-ray tube is set to the tube voltage, and detecting a transmitted X-ray image including an X-ray refraction image formed in a region along a contour of a boundary surface between the first X-ray propagation medium and the second X-ray propagation medium by refraction of the X-ray beam by the boundary surface in superimposition on an X-ray absorption image reflecting the X-ray absorbing power difference between the first X-ray propagation medium and the second X-ray propagation medium.

X-ray examination method and apparatus

An X-ray apparatus includes a rotation-anode type X-ray tube which is configured such that a rotatable anode target and a cathode that is disposed to be opposed to the anode target are accommodated within a vacuum envelope, a stator which generates an induction electromagnetic field for rotating the anode target, a housing which accommodates and holds at least the rotation-anode type X-ray tube, a circulation path which is provided near at least a part of the rotation-anode type X-ray tube, and through which a water-based coolant is circulated, and a cooling unit including a circulation pump, which is provided at a position along the circulation path and forcibly feeds the water-based coolant, and a radiator which radiates heat of the water-based coolant, wherein an amount of dissolved oxygen at 25&#xb0; C. in the water-based coolant is 5 mg/liter or less.

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Otawara, Japan

Hidero Anno