公开(公告)号：US10832884B2

公开(公告)日：2020-11-10

申请号：US16485733

申请日：2017-08-16

Applicant: VALUE SERVICE INNOVATION CO., LTD.

Inventor： Dae Jun Kim ,  Kwan Soo Park ,  Ji Eun Kim ,  Dong il Kim ,  Chung Yeol Lee ,  Do Yun Kim

IPC: H01J35/06 ,  H01J35/16

Abstract: A cylindrical X-ray tube having an outer insulating layer, a cathode electrode and an anode electrode disposed at both ends of the outer insulating layer, a gate electrode disposed between the cathode and anode electrodes, an emitter, and a target, comprises an inner insulating layer which is disposed between the cathode electrode and the outer insulating layer, is formed to extend downward in a coaxial direction with the outer insulating layer, and is pre-adjusted in order to secure an insulating distance between the cathode electrode and the gate electrode. Thus, by providing a separate internal insulating layer extending coaxially with the external insulating layer between the cathode electrode and the external insulating layer, the insulating distance between the cathode electrode and the gate electrode, the insulating distance between the cathode electrode and the anode electrode may be easily adjusted, so that a desired insulating capability can be secured.

公开(公告)号：US20200343070A1

公开(公告)日：2020-10-29

申请号：US16394667

申请日：2019-04-25

Applicant: The Boeing Company

Inventor： Morteza Safai

IPC: H01J35/30 ,  H01J35/14 ,  H01J35/06 ,  G01N23/203 ,  H05G1/52

Abstract: Disclosed herein is an apparatus for electromagnetic x-ray control. The apparatus comprises a thermionic filament, positioned at a first end of a micro-focus x-ray tube and configured to generate an electron stream. The apparatus also comprises an x-ray generation target, positioned within the micro-focus x-ray tube at a second end of the micro-focus x-ray tube, opposite the first end, to receive the electron stream and to generate x-rays in response to the electron stream impinging on the x-ray generation target. The apparatus further comprises an electromagnetic field element, configured to generate an electromagnetic field that receives the electron stream and operable to vary the electromagnetic field to redirect the electron stream, within the micro-focus x-ray tube, to impinge on the x-ray generation target at variable locations on the x-ray generation target. Each one of the variable locations corresponds to a different one of multiple variations of the electromagnetic field.

公开(公告)号：US10818468B1

公开(公告)日：2020-10-27

申请号：US16081585

申请日：2017-03-01

Applicant: Excillum AB

Inventor： Björn Hansson ,  Tomi Tuohimaa ,  Göran Johansson

IPC: A61B6/00 ,  H01J35/18 ,  H01J35/14 ,  H01J35/06

Abstract: An X-ray source and a corresponding method for generating X-ray radiation are disclosed. The X-ray source includes a target generator, an electron source and a mixing tool. The target generator is adapted to form a liquid jet propagating through an interaction region, whereas the electron source is adapted to provide an electron beam directed towards the interaction region such that the electron beam interacts with the liquid jet to generate X-ray radiation. The mixing tool is adapted to induce mixing of the liquid jet at a distance downstream of the interaction region such that a maximum surface temperature of the liquid jet is below a threshold temperature. By controlling the maximum surface temperature, vaporisation, and thus the amount of contaminations originating from the jet, may be reduced.

公开(公告)号：US10818466B1

公开(公告)日：2020-10-27

申请号：US16400735

申请日：2019-05-01

Applicant: GE Precision Healthcare LLC

Inventor： Donald Robert Allen ,  Sandhya Dammu ,  Andrew Marconnet ,  Gregory Steinlage

IPC: H01J35/06

Abstract: An x-ray tube includes an electron emitter and a cathode cup having a recess that holds the electron emitter. The recess has a bottom surface, and a shield is positioned in the recess between the electron emitter and the bottom surface. The shield is configured to receive deposited sublimated emitter material and to maintain the sublimated emitter material away from the electron emitter.

公开(公告)号：US10791615B2

公开(公告)日：2020-09-29

申请号：US16086440

申请日：2017-03-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Lester Donald Miller ,  Nirmal Soni ,  Rolf Karl Otto Behling ,  Roland Proksa ,  Dionys Van De Ven

IPC: H05G1/32 ,  H05G1/58 ,  H01J35/06 ,  H01J35/10 ,  H01J35/04 ,  G01V5/00 ,  H05G1/10

Abstract: The present invention relates to an apparatus for generating X-rays. It is described to produce (210) with a power supply (40) at least two voltages between at least one cathode (20) and an anode (30), wherein the at least two voltages comprises a first voltage and a second voltage. The at least one cathode is positioned relative to the anode. Electrons are emitted (220) from the at least one cathode. Electrons emitted from the at least one cathode are interacted (230) with the anode with energies corresponding to the at least two voltages. X-rays are generated (230) from the anode, wherein the electrons interact with the anode to generate the X-rays. First X-rays are generated when the power supply produces the first voltage and second X-rays are generated when the power supply produces the second voltage. The power supply is controlled (250), such that a ratio between the first X-rays and the second X-rays is controllable.

公开(公告)号：US10770256B1

公开(公告)日：2020-09-08

申请号：US16814192

申请日：2020-03-10

Applicant: Siemens Healthcare GmbH

Inventor： Florian Seperant

IPC: H01J35/06 ,  H01J1/18

Abstract: A flat emitter, in an embodiment, includes an emitter surface to emit electrons when a filament current is applied; a first end region including at least one first connection leg; and a second end region including at least one second connection leg. According to an embodiment, at least one connection leg is embodied as a band-type connection leg and is torsioned at an angle in a longitudinal axis. According to an embodiment, the first connection leg and the second connection leg are embodied as band-type connection legs and in each case are torsioned at a definable angle in a longitudinal axis. As a result, a simply constructed flat emitter in terms of design is achieved, with a longer service life and a high level of electron emission.

公开(公告)号：US20200273656A1

公开(公告)日：2020-08-27

申请号：US16281716

申请日：2019-02-21

Applicant: Varex Imaging Corporation

Inventor： Wayne R. Hansen ,  Vance S. Robinson ,  Kasey O. Greenland ,  Gangqiang Wang

IPC: H01J35/06 ,  H01J35/10 ,  H01J35/18 ,  H01J35/14

Abstract: An emitter for a closed x-ray tube includes an emitter body formed of a low work function emitter material, the emitter body having a major surface and a secondary surface. The major surface is adapted for emission of electrons from the low work function material. The emitter assembly is adapted to reduce an emission current density emitted from the secondary surface of the emitter body, as compared to the major surface.

公开(公告)号：US20200245442A1

公开(公告)日：2020-07-30

申请号：US16842925

申请日：2020-04-08

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Hiroshi Hirayama ,  Sanae Harada ,  Takenori Mizuno ,  Masahiro Karahashi

IPC: H05G1/32 ,  H01J35/06 ,  H05G1/10 ,  H01J35/08 ,  H05G1/58 ,  H01J35/04

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a high voltage power supply, and focus size control circuitry. The X-ray tube includes a cathode, an anode, and a deflector configured to deflect the electrons from the cathode. The high voltage power supply generates a tube voltage to be applied between the cathode and the anode. The focus size control circuitry controls a focus size formed in the anode by applying to the deflector a deflecting voltage of a deflecting voltage value based on a tube voltage value of the tube voltage and a predetermined size, in order to form a focus of the predetermined size in the anode during the period where the tube voltage is applied by the high voltage power supply.

公开(公告)号：US10705030B2

公开(公告)日：2020-07-07

申请号：US14221319

申请日：2014-03-21

Applicant: NIKON CORPORATION

Inventor： Takashi Watanabe

IPC: G01N23/04 ,  G01N23/046 ,  G01N23/18 ,  H01J35/06 ,  H01J35/08 ,  H01J35/12 ,  H01J35/14 ,  H01J35/16 ,  H05G1/04 ,  H05G1/06 ,  H05G1/02 ,  H01J35/04

Abstract: Provided is an x-ray device capable of suppressing reduction in detection precision. The X-ray device irradiates x-rays on an object and detects X-rays that pass through the object. The X-ray device comprises: an X-ray source that emits X-rays; a stage that holds the object; a detection device that detects at least some of the x-rays that have been emitted from the X-ray source and have passed through the object; a chamber member that forms an internal space wherein the X-ray source, the stage, and the detection device are arranged; and a partitioning section that separates the internal space into a first space wherein the X-ray source is arranged and a second space wherein the detection device is arranged.

公开(公告)号：US20200185184A1

公开(公告)日：2020-06-11

申请号：US16775361

申请日：2020-01-29

Applicant: Canon Electron Tubes & Devices Co., Ltd.

Inventor： Takayuki Ito

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

Abstract: According to one embodiment, an X-ray tube includes an anode including a target surface, and a cathode including a first filament and a focusing electrode. The focusing electrode includes a valley bottom portion, a first inclined plane sloping up from the valley bottom portion in a direction of the anode, a first focusing groove, and a first storage groove. θ1 is greater than 0°. The first focusing groove has a longitudinal axis. One end portion on the first extension line side of the first focusing groove is closer to a first reference surface than the other end portion of the first focusing groove.