公开(公告)号：US2521663A

公开(公告)日：1950-09-05

申请号：US78387947

申请日：1947-11-04

Applicant: GEN ELECTRIC X RAY CORP

Inventor： ZUNICK MICHAEL J

IPC: H01J35/10

CPC classification number: H01J35/10

公开(公告)号：US2329317A

公开(公告)日：1943-09-14

申请号：US38415341

申请日：1941-03-19

Applicant: GEN ELECTRIC X RAY CORP

Inventor： ATLEE ZED J

IPC: H01J35/06 ,  H01J35/10

CPC classification number: H01J35/06 ,  H01J35/10 ,  H01J35/101

公开(公告)号：US2229152A

公开(公告)日：1941-01-21

申请号：US23091138

申请日：1938-09-21

Applicant: WESTINGHOUSE ELECTRIC & MFG CO

Inventor： JOHANNES WALSWEER

IPC: H01J35/00 ,  H01J35/10

CPC classification number: H01J35/10 ,  H01J35/00

公开(公告)号：US1962275A

公开(公告)日：1934-06-12

申请号：US46406730

申请日：1930-06-26

Applicant: PHILIPS NV

Inventor： GILLES HOLST ,  ALBERT BOUWERS

IPC: H01J35/10

CPC classification number: H01J35/10 ,  H01J35/101 ,  H01J2235/1026 ,  H01J2235/1266

公开(公告)号：US20240285977A1

公开(公告)日：2024-08-29

申请号：US18658290

申请日：2024-05-08

Applicant: Varian Medical Systems, Inc.

Inventor： James CLAYTON

IPC: A61N5/10 ,  G21K1/093 ,  G21K1/10 ,  H01J35/08 ,  H01J35/10 ,  H01J35/14 ,  H01J35/22 ,  H01J35/30 ,  H05G2/00 ,  H05H9/04

CPC classification number: A61N5/1077 ,  A61N5/1043 ,  A61N5/1045 ,  A61N5/1047 ,  A61N5/1081 ,  G21K1/093 ,  G21K1/10 ,  H01J35/10 ,  H01J35/116 ,  H01J35/153 ,  H01J35/22 ,  H01J35/30 ,  H05G2/00 ,  H05H9/048 ,  A61N2005/1089

Abstract: A radiotherapy system includes an X-ray target configured to convert an incident electron beam into a therapeutic X-ray beam, a purging magnet configured to redirect unwanted particles emitted from the X-ray target away from the therapeutic X-ray beam, and a particle collector configured to absorb the unwanted particles subsequent to redirection by the purging magnet. The particle collector may be configured to dissipate at least 50% of the energy of the incident electron beam.

公开(公告)号：US20180261420A1

公开(公告)日：2018-09-13

申请号：US15912723

申请日：2018-03-06

Applicant: Siemens Healthcare GmbH

Inventor： Florian HOLCH ,  Kai-Uwe TAUBENREUTHER ,  Thomas WEIDINGER

IPC: H01J35/30 ,  H01J35/10 ,  H05G1/52 ,  H01J35/14

CPC classification number: H01J35/305 ,  H01J35/10 ,  H01J35/14 ,  H01J2235/10 ,  H05G1/52

Abstract: An X-ray emitter includes an anode rotatably mounted arranged inside a vacuum housing. It can be set into rotation by an electric drive. In the region of a focal spot, the anode can be exposed to an electron beam emitted by a cathode. According to an embodiment of the invention, a control unit is configured to activate an electromagnetic deflection unit that deflects the electron beam as a function of at least one operating parameter of the electric drive such that a movement of the focal spot, caused by electromagnetic fields of the electric drive, can be at least partly compensated for. An embodiment of the invention further relates to a method for compensating for a focal spot movement when X-ray emitters in operation.

公开(公告)号：US09960003B2

公开(公告)日：2018-05-01

申请号：US15544854

申请日：2016-01-18

Applicant: SIEMENS AKTIENGESELLSCHAFT

Inventor： Andreas Geisler ,  Svetlana Goβmann ,  Oliver Heid

IPC: H01J1/304 ,  H01J35/06 ,  H01J35/10 ,  H01J9/02 ,  H01J35/14 ,  H01J31/08 ,  H01J3/02

CPC classification number: H01J1/304 ,  H01J3/021 ,  H01J9/025 ,  H01J31/08 ,  H01J35/065 ,  H01J35/10 ,  H01J35/14

Abstract: An apparatus is provided for generating X-ray radiation in an outer magnetic field, which may be generated by a magnetic field device. The apparatus includes a cathode configured to generate an electron beam and an anode configured to retard the electrons of the electron beam and generate an X-ray beam. The apparatus further includes a device configured to generate an electric field orientated from the anode in the direction of the cathode and substantially collinear to the outer magnetic field, wherein the cathode, as an electron emitter, includes a cold cathode that passively provides free electrons by field emission.

公开(公告)号：US20180033583A1

公开(公告)日：2018-02-01

申请号：US15220158

申请日：2016-07-26

Applicant: Neil Dee Olsen

Inventor： Neil Dee Olsen

IPC: H01J35/08

CPC classification number: H01J35/08 ,  H01J35/10 ,  H01J2235/081

Abstract: An anode for an X-ray tube can include a ceramic body, e.g., material that includes yttrium-oxide derivatives. Upon collision with an anode, the kinetic energy of an electron beam in an X-ray tube is converted to high frequency electromagnetic waves, i.e., X-rays. An anode with a ceramic body can reduce costs and/or weight, extend the life of the anode or associated components (e.g., bearings) and simultaneously provide a high heat storage capacity.

公开(公告)号：US09870892B2

公开(公告)日：2018-01-16

申请号：US14360425

申请日：2012-10-24

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Rolf Karl Otto Behling

IPC: H01J35/00 ,  H01J35/10

CPC classification number: H01J35/10 ,  H01J2235/086

Abstract: In order to provide an increased, i.e. faster, periodic modulation of X-ray intensity, an anode disk (28) for a rotating anode in an X-ray tube includes a circumferential target area (34) with a target surface area (36), a focal track center line (38), and a beam-dump surface area (40). The target surface area when hit by an electron beam generates X-rays. The beam-dump surface area when hit by an electron beam generates no useful X-rays Target portions and beam-dump portions are arranged alternatingly along the focal track center line. A focal spot is centered on the focal track center line. Structures on both sides of the focal track center line are arranged such that same radiation intensities are provided by the both sides when being hit by a homogenous electron beam.

公开(公告)号：US20170352518A1

公开(公告)日：2017-12-07

申请号：US15616342

申请日：2017-06-07

Applicant: Toshiba Medical Systems Corporation

Inventor： Yuki TOTSUKA ,  Masaharu SOYA ,  Katsuo TAKAHASHI ,  Kansei TAKAHASHI ,  Akira MOCHIDUKl ,  Katsunori KOJIMA ,  Daisuke SATO ,  Hisayuki UEHARA ,  Hiroyoshi KOBAYASHI ,  Akio TETSUKA

IPC: H01J35/10 ,  A61B6/06 ,  A61B6/00

CPC classification number: H01J35/10 ,  A61B6/06 ,  A61B6/40 ,  A61B6/4441 ,  A61B6/465 ,  A61B6/487 ,  A61B6/54 ,  H01J35/26

Abstract: An X-ray diagnostic apparatus comprises an X-ray tube and processing circuitry. The X-ray tube includes a rotary anode. The processing circuitry is configured to derive an acquiring condition from a fluoroscopic image, and start to increase, in accordance with the acquiring condition derived, a rotating speed of the anode from a low rotating speed to a high rotating speed before the X-ray tube finishes emitting an X-ray to acquire the fluoroscopic image.