Canon Kabushiki Kaisha

Kazuyuki Ueda

Miki Tamura

Ichiro Nomura

Shuji Aoki

Takao Ogura

Yasue Sato

Yoshihiro Yanagisawa

Koji Yamazaki

Kenji Niibori

Kazuya Tsujino

Nobuhiro Ito

Jun Yamamoto

Nobuyuki Takahashi

Takashi Shiozawa

Osamu Tsujii

Satoshi Mogi

Yasushi Shioya

Yasuo Ohashi

Kazushige Utsumi

Toru Nakakubo

Osamu Takamatsu

Shinya Koyama

Koichiro Nakanishi

Akira Morita

Taihei Mukaide

Shinichi Kawate

Masahiro Tagawa

Shigeki Matsutani

Tamayo Hiroki

Masaaki Shibata

Kazuya Miyazaki

Akiyoshi Yokoi

Kazuhiro Sando

Koichi Tsunoda

Shoji Ihara

Ryoji Tanaka

A thickness of a bonding material () is varied in a radial direction orthogonal to a central axis (P) of the tubular anode member (), the bonding material () being used for bonding a transmitting substrate () for supporting a target layer () and a tubular anode member () in a direction along the central axis (P). Thus, a region in which a circumferential tensile stress of the bonding material () is alleviated is formed in the direction along the central axis (P) to prevent a crack from developing in the bonding material ().

Anode, and x-ray generating tube, x-ray generating apparatus, and radiography system using the same

Provided is an X-ray generating apparatus, which includes: an X-ray generating tube configured to emit X-rays through a first window; an outer case configured to contain the X-ray generating tube and provided with a second window transmitting the X-rays at a position facing the first window; an insulating fluid with which an unoccupied space of the outer case is filled; an insulating member located between the first window and the second window and provided with an opening in an irradiation area of the X-ray through the first window; and an insulating third window removably fit into the opening of the insulating member, wherein a linear expansion coefficient of the third window is greater than a linear expansion coefficient of the insulating member, and the third window and the first window face each other via a gap through which the insulating fluid is flowable.

X-ray generating apparatus and radiography system

A radiographic apparatus includes a target array and an X-ray detecting unit. The target array includes a plurality of targets and a forward shielding member. The X-ray detecting unit includes a detecting portion. The X-ray detecting unit further includes a shielding portion extending toward an outer side of the detecting portion along an array direction in which the targets are arrayed.

Radiographic apparatus

A radiographic apparatus including a target array and an X-ray detecting unit. The target array includes a plurality of targets and a forward shielding member. The forward shielding member includes a plurality of partitions. The X-ray detecting unit includes a detecting portion. The partitions each have sloping surfaces whose angles of inclination change along an array direction.

X-ray generating unit and radiographic apparatus

An X-ray generating tube including a transmission target having a minute focal spot. The X-ray generating tube includes a transmission target having a first surface configured to be irradiated with an electron beam; an electron emitting source configured to irradiate the transmission target with the electron beam obliquely; and a tubular forward shield member to define an extraction angle of an extracted X-ray beam. The forward shield member is disposed such that a central axis of the electron beam and a central axis of the X-ray beam whose extraction angle is defined are located at the same side with respect to a virtual normal plane perpendicular to the surface and a projection of the central axis of the electron beam to the surface.

X-ray generating tube, X-ray generating apparatus, and radiography system

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

An anode member includes a first metal tube and a second metal tube having a coefficient of thermal expansion that is larger than that of the first metal tube. A peripheral portion of a target is bonded to the anode member via a bonding material that is arranged so as to extend over the first metal tube and the second metal tube.

X-ray generating tube, X-ray generating apparatus, X-ray imaging system, and anode used therefor

A radiation generating apparatus includes a radiation generation tube including an electron emitting source having an electron emitting member, a transmission type target, a tubular backward shielding member having an electron passing hole facing the target layer at one end, located at the electron emitting source side of the transmission type target, and connected to the periphery of the base member. The radiation generating apparatus further includes a collimator having an opening for defining an angle for extracting the radiation at the opposite side of the electron emitting source side of the transmission type target, and an adjusting device connected to the collimator, and configured to vary an opening diameter of the opening, wherein the target layer has a portion separated from a connection portion of the base member and the backward shielding member at the periphery.

Radiation generating tube and radiation generating apparatus including radiation generation tube

Provided is an X-ray generator including an electron passage in an electron-passage forming member; and a target on an insulative substrate. The transmission X-ray generator irradiates the target with electrons that have passed through the electron passage to generate X-rays. The target is provided at a central region of the substrate; the electron passage accommodates a secondary-X-ray generating section that generates X-rays by irradiation with electrons reflected from the target; the secondary-X-ray generating section and the target are disposed so that both of X-rays generated by direct irradiation of the target with the electrons and X-rays generated by irradiation of the secondary-X-ray generating section with the electrons reflected from the target are radiated to the outside; and at least part of the peripheral region of the substrate has higher transmittance for the X-rays generated at the secondary-X-ray generating section than the central region of the substrate.

X-ray generator and X-ray imaging apparatus

A radiation generating apparatus includes: an envelopehaving a first windowthrough which a radiation is transmitted; and a radiation tubebeing held within the envelope, and having a second windowwhich is arranged in opposition to the first window, and through which the radiation is transmitted; and a radiation shielding memberthermally connected to the second window, having a radiation transmitting holearranged in communication with the second window, and having a protruding portion protruding from the second windowtoward the first window. A thermally conductive memberhaving a higher thermal conductivity rather than that of the radiation shielding memberis connected to the protruding portion of the radiation shielding member. The radiation generating apparatus can shield an unnecessary radiation and cool a target with a simple structure and is entirely reduced in weight.

Radiation generating apparatus and radiation 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

A multi-source radiation generator in which plural radiation sources are arranged in series includes a control unit that controls a dose of radiation emitted from each of the radiation sources depending on positions of the radiation sources, and reduces variation in a radiation dose resulting from differences in positions of the radiation sources by changing an irradiation time, an anodic current value of each of the radiation sources depending on a distance from each of the radiation sources to a subject.

Multi-source radiation generator and radiography system

A radiation generating apparatus of the present invention includes an envelopeincluding a first windowallowing radiation to pass; a radiation tubethat is accommodated in the envelope, and includes a second windowallowing radiation to pass, at a position opposite to the first window; a radiation passing holethat is thermally connected to the second windowand communicates with the second window; and a radiation shielding memberprotruding from the second windowtoward the first window. In this apparatus, a thermally conductive memberhaving a higher thermal conductivity than the radiation shielding memberis connected to an outer periphery of the protruding portion of the radiation shielding member. The simple configuration can shield unnecessary radiation, and cool the target, while facilitating reduction in weight.

Provided is a high-output X-ray generation tube in which thermal damage to a target is reduced. The X-ray generation tube includes a target, an electron source, and a grid electrode having multiple electron passage apertures disposed between the target and the electron source. A source-side electron beam on the electron source side with respect to the grid electrode has a current density distribution, and the grid electrode has an aperture ratio distribution so that a region of the source-side electron beam in which a current density is largest is aligned with a region of the grid electrode in which an aperture ratio is smallest.

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Tokyo, Japan

Kazuyuki Ueda