公开(公告)号：US09916961B2

公开(公告)日：2018-03-13

申请号：US14660625

申请日：2015-03-17

Applicant: VAREX IMAGING CORPORATION

Inventor： Bradley D. Canfield

IPC: H01J35/14 ,  H01J35/30 ,  H05G1/52 ,  H05G1/10 ,  H01J35/06

CPC classification number: H01J35/14 ,  H01J35/06 ,  H01J35/30 ,  H01J35/305 ,  H05G1/10 ,  H05G1/52

Abstract: An X-ray tube comprising: a cathode including an emitter; an anode; a first magnetic quadrupole formed on a first yoke and having a magnetic quadrupole gradient for focusing an electron beam in a first direction and defocusing the beam in a second direction; a second magnetic quadrupole formed on a second yoke and having a magnetic quadrupole gradient for focusing the electron beam in the second direction and defocusing the electron beam in the first direction; wherein a combination of the first and second magnetic quadrupoles provides a net focusing effect in both first and second directions of a focal spot of the electron beam; and a pair of opposing quadrupole electromagnetic coils having alternating current offset being configured to deflect the electron beam in order to shift the focal spot of the electron beam on a target.

公开(公告)号：US09887061B2

公开(公告)日：2018-02-06

申请号：US14427580

申请日：2012-09-12

Applicant: Takumi Kobayashi ,  Masaaki Ukita

Inventor： Takumi Kobayashi ,  Masaaki Ukita

IPC: H01J35/06 ,  H01J1/16 ,  H01J35/16 ,  H01J35/30

CPC classification number: H01J35/06 ,  H01J1/16 ,  H01J35/16 ,  H01J35/305

Abstract: This X-ray tube device includes an anode and a cathode including an emitter emitting an electron to the anode. The emitter includes an electron emission portion in a flat plate shape, a pair of terminal portions extending from the electron emission portion, connected to an electrode, and a supporting portion provided separately from the terminal portions, insulated from the electrode, supporting the electron emission portion.

公开(公告)号：US20170372865A1

公开(公告)日：2017-12-28

申请号：US15686853

申请日：2017-08-25

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

Inventor： Tomonari ISHIHARA ,  Hidero ANNO

IPC: H01J35/14 ,  H01J35/16 ,  H01J35/06 ,  H01J35/30 ,  H01J35/10

CPC classification number: H01J35/14 ,  H01J35/06 ,  H01J35/106 ,  H01J35/16 ,  H01J35/30 ,  H01J35/305 ,  H01J2235/1204 ,  H01J2235/16 ,  H01J2235/18

Abstract: According to one embodiment, an X-ray tube device includes a cathode which emits an electron in a direction of an electron path, an anode target which faces the cathode and includes a target surface generating an X-ray, a vacuum envelope which accommodates the cathode and the anode target and is sealed in a vacuum-tight manner, and a quadrupole magnetic field generation unit which forms a magnetic field when direct current is supplied from an electric source, is eccentrically provided with respect to a straight line accordance with the electron path outside the vacuum envelope, and includes a quadrupole surrounding a circumference of a part of the electron path.

公开(公告)号：US20170318651A1

公开(公告)日：2017-11-02

申请号：US15141191

申请日：2016-04-28

Applicant: VARIAN MEDICAL SYSTEMS, INC.

Inventor： Bradley D. Canfield ,  Michael Meiler ,  Colton B. Woodman ,  Inwoo Yoon

IPC: H05G1/52 ,  H01J35/06 ,  H01J35/08 ,  H01J35/14

CPC classification number: H05G1/52 ,  A61B6/035 ,  A61B6/54 ,  A61B6/582 ,  A61B6/584 ,  H01J35/06 ,  H01J35/08 ,  H01J35/14 ,  H01J35/305

Abstract: Technology is described for electronically aligning a central ray of an x-ray tube to a radiation detector. In an example, an x-ray system includes an x-ray tube and a tube control unit (TCU). The x-ray tube includes a cathode that includes an electron emitter configured to emit an electron beam, an anode configured to receive the electron beam and generate x-rays with a central ray from electrons of the electron beam colliding on a focal spot of the anode, and a steering magnetic multipole between the cathode and the anode that is configured to produce a steering magnetic field from a steering signal. At least two poles of the steering magnetic multipole are on opposite sides of the electron beam. The TCU includes at least one steering driver configured to generate the steering signal. The TCU is configured to convert an offset value to the steering signal.

公开(公告)号：US20170256379A1

公开(公告)日：2017-09-07

申请号：US15601728

申请日：2017-05-22

Applicant: Varex Imaging Corporation

Inventor： Bradley D. Canfield ,  Colton B. Woodman

IPC: H01J35/14 ,  H05G1/10 ,  G06F17/50 ,  H01J1/304 ,  H01J9/02 ,  H01J35/06 ,  H01J35/30

CPC classification number: H01J35/14 ,  H01J35/06 ,  H01J35/30 ,  H01J35/305 ,  H05G1/10 ,  H05G1/52

Abstract: A method of designing an electron emitter can include: determining a desired cross-sectional profile of an electron emission from an electron emitter and inputting parameters of the electron emitter into a computer; determining a desired temperature profile for the electron emitter that emits the desired cross-sectional profile; and determining desired emitter dimensions for a defined electrical current through the electron emitter that produces the desired temperature profile with the computer based on the input parameters of the electron emitter. The emitter dimensions can include: each rung width dimension; each first gap segment dimension; each second gap segment dimension; and each web dimension. The emitter can include: a plurality of elongate rungs connected together in a planar pattern; a plurality of corners; a first gap between adjacent non-connected elongate rungs; a second gap between adjacent non-connected elongate rungs; and one or more cutouts between a corner apex and corner nadir.

公开(公告)号：US20170148606A1

公开(公告)日：2017-05-25

申请号：US15299815

申请日：2016-10-21

Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATION

Inventor： Hiroshi HIRAYAMA

IPC: H01J35/02 ,  H01J35/10 ,  A61B6/03 ,  H01J35/06

CPC classification number: H01J35/025 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4488 ,  H01J35/06 ,  H01J35/101 ,  H01J35/103 ,  H01J35/305 ,  H01J2235/1026

Abstract: A radiographic image diagnostic apparatus according to embodiments includes an X-ray tube, a holding member, and coil control circuitry. The X-ray tube includes: a cathode that emits electrons; coils that generate electromagnetic force; and an anode that rotates about a rotation axis in response to the electromagnetic force and to generate an X-ray by receiving the electrons. The holding member holds the X-ray tube so that the X-ray tube is movable. The coil control circuitry controls a current to be supplied to the coils based on at least one of a position of the X-ray tube, a direction of the X-ray tube, or a velocity of the X-ray tube.

公开(公告)号：US20160268095A1

公开(公告)日：2016-09-15

申请号：US14642283

申请日：2015-03-09

Applicant: VARIAN MEDICAL SYSTEMS, INC.

Inventor： Bradley D. Canfield ,  Colton B. Woodman

IPC: H01J35/14

CPC classification number: H01J35/14 ,  H01J35/06 ,  H01J35/26 ,  H01J35/305

Abstract: An X-ray tube can include: a cathode including an electron emitter; an anode configured to receive the emitted electrons; a first magnetic quadrupole between the cathode and the anode and having a first quadrupole yoke with four first quadrupole pole projections extending from the first quadrupole yoke and oriented toward a central axis of the first quadrupole yoke and each of the four first quadrupole pole projections having a first quadrupole electromagnetic coil; a second magnetic quadrupole between the first magnetic quadruple and the anode and having a second quadrupole yoke with four second quadrupole pole projections extending from the second quadrupole yoke and oriented toward a central axis of the second quadrupole yoke and each of the four second quadrupole pole projections having a second quadrupole electromagnetic coil; and a magnetic dipole between the cathode and anode and having a dipole yoke with four dipole electromagnetic coils.

Abstract translation: X射线管可以包括：包括电子发射体的阴极; 被配置为接收所发射的电子的阳极; 阴极和阳极之间的第一磁四极杆，并具有第一四极轭，其具有四个第一四极杆极突起，该第四四极杆从第一四极杆偏转并且朝向第一四极杆的中心轴定向，并且四个第一四极极突起中的每一个具有 第一个四极电磁线圈; 第一磁四极和阳极之间的第二磁四极杆，并具有第二四极轭，其具有从第二四极杆偏转延伸并且朝向第二四极轭的中心轴定向的四个第二四极柱极突起，并且四个第二四极极突起 具有第二个四极电磁线圈; 以及阴极和阳极之间的磁偶极子，并具有具有四个偶极电磁线圈的偶极轭。

公开(公告)号：US09198629B2

公开(公告)日：2015-12-01

申请号：US13459578

申请日：2012-04-30

Applicant: Uwe Wiedmann ,  Denis Perrillat-Amede

Inventor： Uwe Wiedmann ,  Denis Perrillat-Amede

IPC: H01J35/14 ,  A61B6/00 ,  H01J35/10 ,  H01J35/30 ,  G21K1/02

CPC classification number: A61B6/482 ,  A61B6/4035 ,  A61B6/405 ,  A61B6/542 ,  G21K1/02 ,  H01J35/10 ,  H01J35/14 ,  H01J35/305 ,  H01J2235/086 ,  H01J2235/166

Abstract: A medical imaging method comprising generating a radiation at a first energy level by a radiation source, generating a radiation at a second energy level different from the first energy level by the radiation source, emitting the generated radiations at an output of the radiation source towards a detector, and blocking or diverting the emitted radiations during at least one intermediate phase during which the radiation source switches in a transient way from one of the first energy level and the second energy level to the other of the first energy level and the second energy level.

Abstract translation: 一种医学成像方法，包括通过辐射源产生处于第一能级的辐射，通过所述辐射源产生不同于所述第一能级的第二能级的辐射，在所述辐射源的输出处朝向 检测器，以及在至少一个中间相位期间阻断或转移所发射的辐射，在该中间相位期间，辐射源以瞬态方式从第一能量级和第二能级之一切换到第一能级和第二能级中的另一级 。

公开(公告)号：US09153407B2

公开(公告)日：2015-10-06

申请号：US14099201

申请日：2013-12-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Woo Jeong ,  Yoon-Ho Song ,  Sungyoul Choi ,  Jun Tae Kang ,  Jae-woo Kim

IPC: H01J35/06 ,  H01J35/10 ,  H01J35/30 ,  H01J35/14

CPC classification number: H01J35/065 ,  H01J35/14 ,  H01J35/305 ,  H01J2201/30469 ,  H01J2235/068

Abstract: An X-ray tube is provided. The X-ray tube includes a first housing including an X-ray window formed therein, a second housing being rotatable about a rotational shaft installed within the first housing, an anode installed on the rotational shaft within the second housing and positioned in one side of the rotational shaft in an extending direction of the rotational shaft, an emitter installed on the rotational shaft within the second housing, positioned in the other side of the rotational shaft in the extending direction of the rotational shaft, and emitting electron beams, a lens unit installed between the anode and the emitter and focusing the electron beams emitted from the emitter to the anode, and an electron beam deflection unit installed on the rotational shaft to deflect an angle of electron beams moving toward the anode from the lens unit.

Abstract translation: 提供X射线管。 X射线管包括第一壳体，其包括形成在其中的X射线窗口，第二壳体可围绕安装在第一壳体内的旋转轴旋转，阳极安装在第二壳体内的旋转轴上并且位于 所述旋转轴在所述旋转轴的延伸方向上安装在所述第二壳体内的所述旋转轴上，位于所述旋转轴的另一侧沿所述旋转轴的延伸方向，并且发射电子束，透镜单元 安装在阳极和发射器之间并将从发射器发射的电子束聚焦到阳极，以及安装在旋转轴上的电子束偏转单元，以偏转从透镜单元向阳极移动的电子束的角度。

公开(公告)号：US20150187536A1

公开(公告)日：2015-07-02

申请号：US14660584

申请日：2015-03-17

Applicant: VARIAN MEDICAL SYSTEMS, INC.

Inventor： Bradley D. Canfield ,  Colton B. Woodman

IPC: H01J35/14

CPC classification number: H01J35/14 ,  H01J35/06 ,  H01J35/30 ,  H01J35/305 ,  H05G1/10 ,  H05G1/52

Abstract: An X-ray tube can include: a cathode planar emitter that emits an inhomogeneous electron beam; an anode to receive the electron beam; a first magnetic quadrupole having a first yoke with four evenly distributed first pole projections extending from the first yoke and oriented toward a central axis of the first yoke and each of the four first pole projections having a first quadrupole electromagnetic coil; a second magnetic quadrupole having a second yoke with four evenly distributed second pole projections extending from the second yoke and oriented toward a central axis of the second yoke and each of the four second pole projections having a second quadrupole electromagnetic coil; and at least one coil of a first pair of opposing coils with alternating current offset from the power supply.

Abstract translation: X射线管可以包括：发射非均匀电子束的阴极平面发射体; 接收电子束的阳极; 第一磁四极杆，具有第一磁轭，其具有从第一磁轭延伸的四个均匀分布的第一极突起，并且朝向第一磁轭的中心轴定向，四个第一极突起中的每一个具有第一四极电磁线圈; 具有第二磁轭的第二磁四极杆，具有从所述第二磁轭延伸的四个均匀分布的第二磁极突起，并朝向所述第二磁轭的中心轴定向，所述四个第二磁极突起中的每一个具有第二四极电磁线圈; 以及具有与电源偏置的交流电流的第一对相对线圈的至少一个线圈。