公开(公告)号：US20240234077A1

公开(公告)日：2024-07-11

申请号：US18616914

申请日：2024-03-26

Applicant: CANON ANELVA CORPORATION

Inventor： Yoichi ANDO

IPC: H01J35/30 ,  H01J35/14 ,  H05G1/32

CPC classification number: H01J35/30 ,  H01J35/153 ,  H05G1/32

Abstract: An X-ray generating apparatus includes an X-ray generating tube including an electron gun and a target configured to generate X-rays upon receiving an electron beam emitted from the electron gun, a deflector configured to deflect the electron beam, a driving circuit configured to apply an accelerating voltage between a cathode of the electron gun and the target, and an adjuster configured to adjust deflection of the electron beam by the deflector in accordance with the accelerating voltage or an amount of change in the accelerating voltage so as to reduce a change in incident position of the electron beam onto the target due to a change in the accelerating voltage.

公开(公告)号：US20240055215A1

公开(公告)日：2024-02-15

申请号：US18232418

申请日：2023-08-10

Applicant: X-SIGHT INCORPORATED

Inventor： Winston Chern

IPC: H01J35/14 ,  H01J35/06 ,  H01J35/16

CPC classification number: H01J35/153 ,  H01J35/065 ,  H01J35/16 ,  H01J35/147

Abstract: An X-ray source design for improved reliability by mitigating the impact of vacuum arcs, ion back bombardment and ion sputtering includes an X-ray source including one or more field emitter arrays and a circuit configured to control the one or more field emitter arrays. The one or more field emitter arrays include a gate and an emitter. The circuit is configured to apply a voltage between the gate and the emitter.

公开(公告)号：US11771382B2

公开(公告)日：2023-10-03

申请号：US17761574

申请日：2020-09-19

Applicant: ESSPEN GMBH

Inventor： Zahra Mohammadi

IPC: A61B6/03 ,  A61B6/00 ,  H01J35/30 ,  H01J35/14 ,  H01J35/06

CPC classification number: A61B6/035 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4021 ,  A61B6/4275 ,  H01J35/30 ,  A61B6/4488 ,  A61B6/542 ,  H01J35/064 ,  H01J35/153

Abstract: A computer tomograph operates by rigidly arranged x-ray tubes, which are components of emitter-detector elements, which form an emitter-detector ring opened by relocating one emitter-detector element. Each x-ray tube includes a cathode emitting electrons, and an anode arrangement having an anode. Each cathode has an orientation angle relative to the geometrical center axis of the computer tomograph. A tangential plane on the focal spot of the anode has a surface normal, which includes an anode angle with the center axis. X-ray radiation emitted from the focal spot is directed in a center radiation angle to an x-ray detector axially offset relative to the x-ray tubes. The quotient from the sum of the orientation angle, radiation angle and anode angle is between two ninths and two. Each cathode, interacting with an electrode arrangement of the x-ray tubes, produces a focal spot on one of selectable positions on the anode arrangement.

公开(公告)号：US20230293909A1

公开(公告)日：2023-09-21

申请号：US17697430

申请日：2022-03-17

Applicant: Varian Medical Systems, Inc.

Inventor： James CLAYTON

IPC: A61N5/10 ,  H01J35/22 ,  H01J35/14 ,  G21K1/10 ,  G21K1/093

CPC classification number: A61N5/1077 ,  A61N5/1043 ,  H01J35/22 ,  H01J35/153 ,  G21K1/10 ,  G21K1/093 ,  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：US11721515B2

公开(公告)日：2023-08-08

申请号：US17569686

申请日：2022-01-06

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Atsushi Ishii ,  Ginji Sugiura ,  Akihito Kobayashi

IPC: H01J35/14 ,  H05G1/02

CPC classification number: H01J35/153 ,  H05G1/025 ,  H01J2235/1216 ,  H01J2235/1245 ,  H01J2235/1291

Abstract: An X-ray module includes a housing; an electron gun that emits an electron beam inside the housing; a target disposed inside the housing and fixed to the housing, to generate an X-ray when the electron beam is incident on the target; and a deflection unit including a permanent magnet and disposed outside the housing, to deflect the electron beam by means of a magnetic force of the permanent magnet. The deflection unit includes a heat insulating member disposed at least between the permanent magnet and the housing. A thermal conductivity of the heat insulating member is lower than a thermal conductivity of the permanent magnet.

公开(公告)号：US20230238204A1

公开(公告)日：2023-07-27

申请号：US17923259

申请日：2021-04-29

Applicant: Excillum AB

Inventor： Björn HANSSON ,  Julius HÅLLSTEDT ,  Tomi TUOHIMAA ,  Ulf LUNDSTRÖM ,  Daniel NILSSON

IPC: H01J35/14 ,  H01J35/30 ,  G01N23/04

CPC classification number: H01J35/153 ,  H01J35/30 ,  G01N23/04 ,  G01N2223/204

Abstract: An X-ray imaging system, including a target; an electron beam source configured to provide an electron beam for interaction with the target to generate X-ray radiation; electron optics configured to alternately direct the electron beam to at least a first and a second location on the target; an X-ray detector array configured to receive X-ray radiation generated at the first and second locations on the target; a sample position region for receiving a sample to be exposed to generated X-ray radiation, the sample position region being located in a region where X-ray radiation generated at the first location overlaps with X-ray radiation generated at the second location; and a processing unit coupled to the X-ray detector array, the processing unit being configured to create an image of a sample, positioned in the sample position region, based on the X-ray radiation originating from the first location and from the second location.

公开(公告)号：US12125662B2

公开(公告)日：2024-10-22

申请号：US17657692

申请日：2022-04-01

Applicant: GE Precision Healthcare LLC

Inventor： John M Boudry ,  Ryan J Lemminger ,  Adam Israel Cohen ,  Jean-Francois Larroux

IPC: H01J35/14 ,  A61B6/03 ,  A61B6/40 ,  G01N23/046

CPC classification number: H01J35/153 ,  A61B6/032 ,  A61B6/4028 ,  G01N23/046 ,  H01J35/147 ,  H01J2235/086

Abstract: Systems/techniques that facilitate correction of intra-scan focal-spot displacement are provided. In various embodiments, a system can access a first gantry angle of a medical scanner. In various aspects, the system can determine a first displacement of a focal-spot of the medical scanner based on the first gantry angle, by referencing a mapping that correlates gantry angles to focal-spot displacements. In various instances, the system can compensate, via one or more focal-spot position adjusters of the medical scanner, for the first displacement.

公开(公告)号：US12106927B2

公开(公告)日：2024-10-01

申请号：US18509608

申请日：2023-11-15

Applicant: CANON ANELVA CORPORATION

Inventor： Yoichi Ando

IPC: H01J35/14 ,  H01J35/08 ,  H01J35/16 ,  H01J35/24 ,  G01N23/046

CPC classification number: H01J35/153 ,  H01J35/116 ,  H01J35/16 ,  H01J35/24 ,  G01N23/046 ,  H01J35/112

Abstract: An X-ray imaging apparatus includes an X-ray generation apparatus including an X-ray generation tube having an electron gun and a target configured to receive an electron beam from the electron gun to generate X-rays, a support structure supporting the tube, and a deflector configured to deflect the electron beam, an X-ray detector configured to detect the X-rays from the X-ray generation apparatus, and a control apparatus configured to control the X-ray generation apparatus. The support structure supports the tube to permit at least the target to be pivoted in a state in which the deflector is fixed, and the control apparatus determines, based on use amount of the X-ray generation apparatus and/or change of the X-rays generated by the X-ray generation apparatus, whether it is necessary to pivot the target.

公开(公告)号：US12080508B2

公开(公告)日：2024-09-03

申请号：US17628615

申请日：2020-07-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Rolf Karl Otto Behling ,  Steffen Holzapfel

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

CPC classification number: H01J35/153 ,  H01J35/10 ,  H01J35/30 ,  H01J2235/088

Abstract: An X-ray source (100) for generating X-ray radiation of first and second energy spectra is proposed, wherein the X-ray intensity imbalance between the first and second energy spectra is reduced as compared to conventional X-ray sources. The reduction of the X-ray intensity imbalance is achieved by configuring a smaller electron impact angle (141) onto the anode (102) when the higher tube voltage is applied as compared to when the lower tube voltage is applied.

公开(公告)号：US20240285976A1

公开(公告)日：2024-08-29

申请号：US18587377

申请日：2024-02-26

Applicant: AcceleRAD Technologies, Inc.

Inventor： Curtis Allen

IPC: A61N5/10 ,  H01J35/14

CPC classification number: A61N5/1077 ,  H01J35/153

Abstract: Vacuum electron devices (VEDs) include an electron accelerator that generates an electron beam from an electron source along a central axis. Targets are arranged on a circular arc and generate photons upon impact by the electron beam. A controllable magnetic field generator generates a magnetic field to change a trajectory of the electron beam, including a first field region that causes the electron beam to diverge from the central axis and a second field region that causes the electron beam to converge toward the central axis to impact a selected target.