公开(公告)号：US11456146B2

公开(公告)日：2022-09-27

申请号：US16627531

申请日：2018-09-13

Applicant: Nuctech Company Limited ,  TSINGHUA UNIVERSITY

Inventor： Chengjun Tan ,  Wenhui Huang ,  Chuanxiang Tang ,  Qingxiu Jin ,  Dongsheng Zhang ,  Qun Luo ,  Donghai Liu ,  Luming Zhang ,  Peidong Wu

IPC: H01J35/14 ,  H01J35/06 ,  H01J35/12 ,  H01J35/16 ,  A61B6/03

Abstract: An anode target, a ray light source, a computed tomography device, and an imaging method, which relate to the technical field of ray processing. The anode target comprises a first anode target, a second anode target, and a ceramic plate. The first anode target is used for enabling, by means of a first voltage carried on the first anode target, an electron beam emitted by a cathode to generate a first ray on a target spot of the first anode target. The second anode target is used for enabling, by means of a second voltage carried on the second anode target, an electron beam emitted by the cathode to generate a second tray on a target spot of the second anode. The ceramic plate is used for isolating the first anode target from the second anode target. By means of the anode target, the ray light source, the computed tomography device and the imaging method, dual-energy distributed ray imaging data can be provided and the imaging quality of a ray system can be improved.

公开(公告)号：US11450502B2

公开(公告)日：2022-09-20

申请号：US17139122

申请日：2020-12-31

Applicant: Shimadzu Corporation

Inventor： Bunta Matsuhana ,  Goro Kambe

IPC: H01J35/14 ,  H01J35/04 ,  A61B6/00 ,  H05G1/52 ,  H01J35/06

Abstract: An X-ray imaging apparatus and a consumption level estimation method for an X-ray source, which estimate the consumption level of an X-ray source without measuring grid voltage. An X-ray control part includes: a tube current value setting part setting a tube current value supplied to an X-ray source; a tube current value measurement part measuring a cathode current value as the tube current value by a cathode current detector; a time measurement part measuring the time when the tube current value is set by the tube current value setting part and the time when the tube current value measured by the tube current value measurement part reaches the set value; and a consumption level estimation part estimating the consumption level of a cathode in the X-ray source based one the time until the tube current value reaches the set value after the tube current value has been set.

公开(公告)号：US11443913B2

公开(公告)日：2022-09-13

申请号：US17330978

申请日：2021-05-26

Applicant: Siemens Healthcare GmbH

Inventor： Anja Fritzler

IPC: H01J35/06 ,  H01J35/14 ,  H01J35/10 ,  H05G1/52

Abstract: An X-ray radiator and an X-ray assembly are disclosed. The X-ray radiator according to an embodiment has an evacuated X-ray tube housing, mounted to be rotatable about a rotation axis, the X-ray tube housing including an anode and an electron source. The anode is arranged within the X-ray tube housing non-rotatably relative to the X-ray tube housing and is configured to generate X-ray radiation via electrons impacting upon a focal spot of the anode, the electron source being mounted substantially stationary within the X-ray tube housing relative to the rotation axis. The electron source has a main emitter and at least one subsidiary emitter for emitting electrons. The electron emission of the main emitter and/or of the at least one subsidiary emitter is controllable such that a spatial movement of the focal spot due to a movement of the electron source is reduced.

公开(公告)号：US20220254594A1

公开(公告)日：2022-08-11

申请号：US17572132

申请日：2022-01-10

Applicant: Moxtek, Inc.

Inventor： Eric Miller

IPC: H01J35/06

Abstract: A planar filament 11f can include multiple materials to increase electron emission in desired directions and to suppress electron emission in undesired directions. The filament 11f can include a core-material CM between a top-material TM and a bottom-material BM. The top-material TM can have a lowest work function WFt; the bottom-material BM can have a highest work function WFb; and the core-material CM can have an intermediate work function WFc(WFt Wb). This shape makes it easier to coat the edges 31e with the bottom-material BM, because the edges 31e tilt toward and partially face the sputter target. This shape also helps direct more electrons to a center of the target 14, and reduce electron emission in undesired directions.

公开(公告)号：US20220246383A1

公开(公告)日：2022-08-04

申请号：US17167340

申请日：2021-02-04

Applicant: Han Sung LEE

Inventor： Han Sung LEE

IPC: H01J35/06 ,  H01J35/16

Abstract: The present disclosure relates to a CNT X-ray source apparatus, and more particularly, to a CNT X-ray source apparatus configured to maximize utilization of the internal space of a CNT X-ray tube body, having grooves made of an insulating material, and provided with a base portion for supporting a plurality of electrodes. With this configuration, mass production is possible. The CNT X-ray source apparatus of the present disclosure includes a cathode electrode; an emitter provided on the cathode electrode and responsible for emitting electrons; a gate electrode disposed above the cathode electrode and spaced apart from the cathode electrode by a predetermined interval; a focusing electrode for preventing scattering of electrons emitted from the emitter; and a base portion responsible for supporting one or more of the cathode electrode, the gate electrode, and the focusing electrode and formed of an insulating material. In this case, one or more grooves for accommodating at least one of the cathode electrode, the gate electrode, and the focusing electrode are formed in the base portion.

公开(公告)号：US11315750B2

公开(公告)日：2022-04-26

申请号：US16627527

申请日：2018-06-01

Applicant: Nuctech Company Limited ,  TSINGHUA UNIVERSITY

Inventor： Chengjun Tan ,  Wenhui Huang ,  Chuanxiang Tang ,  Qingxiu Jin ,  Dongsheng Zhang ,  Qun Luo ,  Donghai Liu ,  Luming Zhang ,  Peidong Wu

IPC: H01J5/14 ,  H01J35/14 ,  H01J35/06 ,  H01J35/12 ,  H01J35/16 ,  A61B6/03

Abstract: An anode target comprises: a plurality of target structures, used for receiving an electron beam emitted by a cathode to generate a ray, the plurality of target structures being of three-dimensional structures having bevels; a copper cooling body, used for bearing the target structures and comprising an oxygen-free copper cooling body; a cooling oil tube, used for cooling the anode target; and a shielding layer, used for achieving a shielding effect and comprising a tungsten shielding layer. The anode target, the ray light source, the computed tomography scanning device, and the imaging method in the present application are able to enable all target spots on the anode target to be distributed on a straight line, imaging quality of a ray system is improved, and complexity of an imaging system is reduced.

公开(公告)号：US11289300B2

公开(公告)日：2022-03-29

申请号：US16742733

申请日：2020-01-14

Applicant: SHENZHEN XPECTVISION TECHNOLOGY CO., LTD.

Inventor： Peiyan Cao ,  Yurun Liu

IPC: H01J35/06 ,  H01J35/08 ,  A61B6/00 ,  H01J35/04 ,  A61B6/03

Abstract: Disclosed herein is an X-ray source, comprising: a cathode in a recess of a first substrate; a counter electrode on a sidewall of the recess, configured to cause field emission of electrons from the cathode; and a metal anode configured to receive the electrons emitted from the cathode and to emit X-ray from impact by the electrons on the metal anode.

公开(公告)号：US20220093358A1

公开(公告)日：2022-03-24

申请号：US17408930

申请日：2021-08-23

Applicant: Moxtek, Inc.

Inventor： Eric Miller ,  Mike Ossofsky

IPC: H01J35/08 ,  H01J35/06 ,  H01J35/18

Abstract: An x-ray source can have increased x-ray flux and can simultaneously provide characteristic peaks and from multiple, different chemical elements. The target can include multiple layers of different chemical compositions. These layers can be distinguished by a higher atomic number, a higher energy K-alpha x-ray characteristic line, and a higher density in one layer compared to another layer. The layer that is lower in these characteristics can face the x-ray window. The layers can be formed by sputter deposition.

公开(公告)号：US20210375572A1

公开(公告)日：2021-12-02

申请号：US17288084

申请日：2019-10-21

Applicant: WASEDA UNIVERSITY ,  MEIDENSHA CORPORATION

Inventor： Suguru NODA ,  Sae KITAGAWA ,  Kotaro YASUI ,  Hisashi SUGIME ,  Daizo TAKAHASHI ,  Yuichi NISHIKIORI ,  Hayato OCHI ,  Rena TAKAHASHI ,  Toshimasa FUKAI

IPC: H01J9/02 ,  H01J1/304 ,  H01J35/06

Abstract: It is a CNT device (1) (carbon-metal structure) equipped with a carbon nanotube layer (2) (CNT layer 2; same hereafter) on a metal pedestal (4). The metal pedestal (4) is brazed to the CNT layer (2) with a brazing material layer (3) interposed therebetween. When manufacturing the CNT device (1), firstly, the CNT layer (2) is formed on a heat-resistant textured substrate (6). Next, the metal pedestal (4) is brazed to the CNT layer (2) that is on the heat-resistant textured substrate (6) with the brazing material layer (3) interposed therebetween. Then, the metal pedestal (4) (and the CNT layer 2) is peeled off the heat-resistant textured substrate (6) to transfer the CNT layer (2) from the heat-resistant textured substrate (6) to the metal pedestal (4).

公开(公告)号：US11179126B2

公开(公告)日：2021-11-23

申请号：US16565515

申请日：2019-09-10

Applicant: FUJIFILM Corporation

Inventor： Masaru Sato ,  Masayoshi Matsuura

IPC: A61B6/04 ,  A61B6/00 ,  A61B6/02 ,  H01J35/06 ,  H01J35/08

Abstract: A radiation source of a mammography apparatus includes plural first radiation tubes and one second radiation tube. The first radiation tubes are used for tomosynthesis imaging. In contrast, the second radiation tube is used for pre-imaging which is performed before the tomosynthesis imaging in order to set the irradiation conditions of radiation in the tomosynthesis imaging. The first radiation tubes are provided at plural positions where the focuses of the radiation are set so as to be arranged in a linear shape or an arc shape at equal intervals. The second radiation tube is provided at a position that is offset from the plural positions where the first radiation tubes are provided to a rear side which is a side opposite to the irradiation side of the radiation.