Canon Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Yasue Sato

Ichiro Nomura

Toshiyuki Komatsu

Kazuyuki Ueda

Masaru Kamio

Takao Ogura

Shinichi Kawate

Miki Tamura

Hisanori Tsuda

Kazuyuki Seino

Hiromasa Mitani

Ihachiro Gofuku

Shin-Ichi Kawate

Yoshihiro Yanagisawa

Shuji Aoki

Toshihiko Takeda

Takashi Nishimura

Kazuhiro Sando

Noritaka Ukiyo

Yoshiyuki Shimada

Tetsuya Kaneko

Takayuki Yagi

Hidetoshi Suzuki

Koji Yamazaki

Naoto Nakamura

Keisuke Yamamoto

Toshihiko Miyazaki

Toshikazu Ohnishi

Masataka Yamashita

Takeo Ono

Hitoshi Oda

Kohei Nakata

Hideshi Kawasaki

Kazuhiro Jindai

Hisaaki Kawade

Masato Yamanobe

Nobuhiro Ito

Shinya Mishina

Yoshiyuki Osada

Kazuya Miyazaki

Makoto Kojima

Aoji Isono

Yoichi Ando

Eiji Yamaguchi

Yasuhiro Hamamoto

Hisanobu Azuma

Yuji Kasanuki

Hiroaki Toshima

Kota Iwasaki

Noritake Suzuki

Yasuyuki Todokoro

Takayuki Sekine

Tomoko Narusawa

The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.

Radiation generating tube, radiation generating apparatus, radiography system and manufacturing method thereof

Provided is an X-ray generating tube with improved withstand voltage property by a simple structure, the X-ray generating tube including a cathode connected to one opening of an insulating tube and an anode connected to the other opening, in which a resistive film having a lower sheet resistance value than that of the insulating tube is disposed on an outer periphery of the insulating tube, and the cathode and the anode are electrically connected to each other via the resistive film.

X-ray generating tube, X-ray generating apparatus and X-ray imaging system using the same

Provided is an X-ray generator which includes: an electron path; a targetdisposed on a substrate, in which electrons having passed through the electron pathare made to emit at the targetand to generate an X-ray, wherein: the targetis disposed at the central area of the substrate; at least a part of a peripheral area of the substratewhich is not covered with the targethas higher transmittance than that of the central area of the substratecovered with the target, with respect to the X-ray generated when electrons having reflected from the target enter an inner wall of the electron path. X-ray generation efficiency may be improved by effectively using electrons reflected off the target

X-ray generator and X-ray imaging apparatus

In a target structure according to the present invention, a target is provided on a central area of an insulating substrate, and a first conductive member for supplying a voltage to the target is provided on a peripheral area of the insulating substrate which is exclusive of an area overlapping the target and is not covered by the target, so that the first conductive member is in contact with and electrically connected to the peripheral portion of the target. Consequently, it is possible to easily form a voltage supply line to the target without preventing diffusion of a heat generated in the target to the substrate and while suppressing emission of an unnecessary X-ray.

Target structure and X-ray generating apparatus

Provided is a radiation generating tube in which an insulating tube is prevented from being damaged by heat generation of a target or an electron emitting source during drive. Extending portions extending along an outer periphery of an insulating tube are provided to a cathode and an anode, respectively, and the insulating tube is joined to the extending portions to enhance the strength of joint portions. At the same time, the insulating tube can be deformed easily by setting a tube wall thickness of the insulating tube at a central portion in a longitudinal direction to be smaller than a tube wall thickness of an opening end, and thus the concentration of thermal stress on the joint portions caused by an increase in temperature of the cathode and the anode is alleviated.

Radiation generating tube, and radiation generating apparatus and radiation imaging system using the same

There is provided a radiation generating apparatus having a simple structure and capable of shielding unnecessary radiation, cooling a target, reducing the size and weight of the apparatus, and achieving higher reliability, and a radiation imaging apparatus having the same. A transmission type radiation tube is held inside a holding container filled with a cooling medium. The transmission type radiation tube includes an envelope having an aperture, an electron source arranged inside the envelope so as to face the aperture of the envelope, a target unit for generating a radiation responsive to an irradiation with an electron emitted from the electron source, and a shield member for shielding a part of the radiation emitted from the target unit. The cooling medium contacts at least a part of the shield member.

Radiation generating apparatus and radiation imaging apparatus

A radiation generating apparatus has a radiation generating tube held in a holding containerand a cooling medium between the holding container and the radiation generating tube. The radiation generating tube includes an envelope with an aperture, an electron emitting source arranged in the envelope, a target arranged facing the source, for generating radiation responsive to irradiation with an electron beam emitted from the source, and a tubular shield for holding the target by an inner wall thereof and shielding part of the radiation emitted from the target. The shield is arranged to protrude outward of the envelope so that the target is positioned on an outer side of the aperture, and the cooling medium contacts at least a part of the shield.

An X-ray emitting target including a diamond substrate, a first layer disposed on the diamond substrate and including a first metal, and a second layer disposed on the first layer and including a second metal whose atomic number is 42 or more and which has a thermal conductivity higher than that of the first metal. Carbide of the first metal is present at a boundary between the diamond substrate and the first layer. The target is prevented from overheating, so that output variation due to rising temperature is suppressed. Thus it is possible to emit stable and high output X-rays.

X-ray emitting target and X-ray emitting device

A radiation generating tubeincludes: an electron emitting sourcea targetspaced from the electron emitting sourcefor generating radiationresponsive to irradiation with an electron beam from the electron emitting sourceand a tubular shielding memberhaving an electron passing holewherein the electron passing holehas an electron incident aperture at one end thereof and has a target supporting surfacesupporting the targetat the other end thereof, wherein the target supporting surfaceis connected through a brazing fillerto a periphery of a surface of the target at a side on which the electron is incident, and an opening size of the other end of the electron passing holeis larger than an opening size of the electron incident aperture at the one end thereof.

Radiation generating tube and radiation imaging apparatus using the same

A radioactive ray generating apparatus includes a second shielding member, a target, and a first shielding member, which are sequentially disposed from an electron emission source side. A shortest distance from a maximum radiation intensity portion of the target to the first shielding member is shorter than a shortest distance from the maximum radiation intensity portion of the target to the second shielding member.

Radioactive ray generating apparatus and radioactive ray imaging system

Provided is an X-ray generator comprising an X-ray tube including a cylindrical body; an electron source in the body; a target at an end of the X-ray tube facing the electron source, the target generating X-rays by irradiation with electrons; a container in which the X-ray tube is arranged; insulating liquid filled between the X-ray tube and the container; and

X-ray generator tube having improved cooling container and X-ray imaging apparatus including the same

A radiation generating tube includes an electron emitting source configured to emit an electron beam; a target configured to generate radiation when the target is irradiated with the electron beam; a rear shield body having a tube-shaped electron passage with openings thereof at each end of the passage, and being located at the side of the electron emitting source with respect to the target, a first opening of the passage facing the electron emitting source and being separated from the electron emitting source, a second opening of the passage facing the target; and a brazing material joining the rear shield body with a peripheral edge of the target, at a position separated from the second opening. A closed space isolated from the electron passage is provided between the target and the rear shield body.

Radiation generating tube, and radiation generating device and apparatus including the tube

An inverter circuit is shared by respective drive circuits that supply a predetermined voltage to a lens electrode and a grid electrode, or to a lens electrode and a cathode electrode. A DC voltage obtained by full-wave rectifying a pulse train output from the inverter circuit is supplied to the lens electrode, a DC voltage obtained by half-wave rectifying a pulse train output from the inverter circuit is supplied to the grid electrode or cathode electrode. At times of a first operation and a last operation of the inverter circuit during a period of generating X-rays, operations of the inverter circuit are controlled such that a trans circuit outputs a negative polarity voltage to the full-wave rectifying circuit and the half-wave rectifying circuit, respectively.

X-ray generating apparatus and method of driving X-ray tube

Growing community of inventors

Machida, Japan

Yasue Sato