公开(公告)号：US07539286B1

公开(公告)日：2009-05-26

申请号：US11942656

申请日：2007-11-19

申请人： Steve Bandy ,  Gary F Virshup ,  Michael Curzon Green ,  James Russell Boye ,  Dennis Runnoe ,  Robert Clark Treseder ,  David Humber

发明人： Steve Bandy ,  Gary F Virshup ,  Michael Curzon Green ,  James Russell Boye ,  Dennis Runnoe ,  Robert Clark Treseder ,  David Humber

IPC分类号： H01J35/06

CPC分类号： H01J1/16 ,  H01J1/135 ,  H01J1/15 ,  H01J35/06 ,  H01J2201/2803 ,  H01J2201/281 ,  H01J2201/2867 ,  H01J2235/1212

摘要： A filament assembly for use in an x-ray emitting device or other filament-containing device is disclosed. In one embodiment, an x-ray tube is disclosed, including a vacuum enclosure that houses both an anode having a target surface, and a cathode positioned with respect to the anode. The cathode includes a filament assembly for emitting a beam of electrons during tube operation. The filament assembly comprises a heat sink and a plurality of filament segments. The filament segments are configured for simultaneous emission of an electron beam for impingement on the target surface of the anode, and are electrically connected in series. Each filament segment includes first and second end portions that are thermally connected to the heat sink, and a central portion that can be configured with a modified work function for preferential electron emission.

摘要翻译： 公开了一种用于x射线发射装置或其它含灯丝装置的灯丝组件。 在一个实施例中，公开了一种X射线管，其包括容纳具有目标表面的阳极和相对于阳极定位的阴极的真空外壳。 阴极包括在管操作期间发射电子束的灯丝组件。 灯丝组件包括散热器和多个灯丝段。 灯丝段被配置为同时发射用于冲击阳极的靶表面的电子束，并且串联电连接。 每个细丝段包括热连接到散热器的第一和第二端部，以及可以配置有用于优先电子发射的修改功函数的中心部分。

公开(公告)号：US20090129550A1

公开(公告)日：2009-05-21

申请号：US11942656

申请日：2007-11-19

申请人： Steve G. Bandy ,  Gary F. Virshup ,  Michael Curzon Green ,  James Russell Boye ,  Dennis Runnoe ,  Robert Clark Treseder ,  David Humber

发明人： Steve G. Bandy ,  Gary F. Virshup ,  Michael Curzon Green ,  James Russell Boye ,  Dennis Runnoe ,  Robert Clark Treseder ,  David Humber

IPC分类号： H01J35/12

CPC分类号： H01J1/16 ,  H01J1/135 ,  H01J1/15 ,  H01J35/06 ,  H01J2201/2803 ,  H01J2201/281 ,  H01J2201/2867 ,  H01J2235/1212

摘要： A filament assembly for use in an x-ray emitting device or other filament-containing device is disclosed. In one embodiment, an x-ray tube is disclosed, including a vacuum enclosure that houses both an anode having a target surface, and a cathode positioned with respect to the anode. The cathode includes a filament assembly for emitting a beam of electrons during tube operation. The filament assembly comprises a heat sink and a plurality of filament segments. The filament segments are configured for simultaneous emission of an electron beam for impingement on the target surface of the anode, and are electrically connected in series. Each filament segment includes first and second end portions that are thermally connected to the heat sink, and a central portion that can be configured with a modified work function for preferential electron emission.

摘要翻译： 公开了一种用于x射线发射装置或其它含灯丝装置的灯丝组件。 在一个实施例中，公开了一种X射线管，其包括容纳具有目标表面的阳极和相对于阳极定位的阴极的真空外壳。 阴极包括在管操作期间发射电子束的灯丝组件。 灯丝组件包括散热器和多个灯丝段。 灯丝段被配置为同时发射用于冲击阳极的靶表面的电子束，并且串联电连接。 每个细丝段包括热连接到散热器的第一和第二端部，以及可以配置有用于优先电子发射的修改功函数的中心部分。

公开(公告)号：US06198957B1

公开(公告)日：2001-03-06

申请号：US08994851

申请日：1997-12-19

申请人： Michael Curzon Green

发明人： Michael Curzon Green

IPC分类号： A61B5055

CPC分类号： G01R33/4808 ,  A61N5/1042 ,  A61N5/1049 ,  A61N2005/1055 ,  A61N2005/1063

摘要： A radiotherapy machine beam treats a region of a subject while the region and volumes abutting the region are imaged by a magnetic resonance imaging system. The beam and an excitation coil assembly of the imaging system are arranged so the beam is not incident on the coil assembly and magnetic fields derived from the coil assembly do not interact with the beam. The excitation coil assembly includes two spaced winding segments for producing a main DC magnetic field; the segments are located on opposite sides of the region. In one embodiment, wherein the excitation coil assembly is mounted independently of movement of an axis of the beam, the winding segments have a common axis generally aligned with an axis about which the beam axis turns. A treatment couch for the subject fits within aligned central openings of the winding segments. The coil produces main magnetic field lines that extend generally in the same direction as the axis about which the beam turns. In other embodiments, the coil assembly moves with the beam axis and the treatment couch is between the coil segments. In one such embodiment, each winding segment includes a central opening (1) through which the beam axis extends; and (2) generally aligned with magnetic field lines established by and extending between the segments. In another such embodiment, the beam axis extends through a space between the segments, being generally orthogonal to magnetic field lines established by and extending between the segments.

摘要翻译： 放射治疗机器束处理受试者的区域，而邻接该区域的区域和体积由磁共振成像系统成像。 光束和成像系统的激励线圈组件被布置成使得光束不入射到线圈组件上，并且从线圈组件导出的磁场不与光束相互作用。 励磁线圈组件包括用于产生主DC磁场的两个间隔开的绕组段; 这些段位于该区域的相对侧上。 在一个实施例中，其中激励线圈组件独立于梁的轴线的移动而被安装，所述绕组段具有大致与梁轴线所绕轴线对准的共同轴线。 用于该主体的治疗床适合绕组段的对准的中心开口。 线圈产生主要磁场线，其大致沿与光束转动的轴线相同的方向延伸。 在其他实施例中，线圈组件随着光束轴线移动，并且处理床位于线圈段之间。 在一个这样的实施例中，每个绕组段包括中心开口（1），梁轴线穿过该中心开口延伸; 和（2）通常与由段之间建立并在段之间延伸的磁场线对准。 在另一个这样的实施例中，射束轴线延伸穿过段之间的空间，其大体上正交于由段之间建立并在段之间延伸的磁场线。

公开(公告)号：US06366798B2

公开(公告)日：2002-04-02

申请号：US09732785

申请日：2000-12-11

申请人： Michael Curzon Green

发明人： Michael Curzon Green

IPC分类号： A61B5055

CPC分类号： G01R33/4808 ,  A61N5/1042 ,  A61N5/1049 ,  A61N2005/1055 ,  A61N2005/1063

摘要： A radiotherapy machine beam treats a region of a subject while the region and volumes abutting the region are imaged by a magnetic resonance imaging system. The beam and an excitation coil assembly of the imaging system are arranged so the beam is not incident on the coil assembly and magnetic fields derived from the coil assembly do not interact with the beam. The excitation coil assembly includes two spaced winding segments for producing a main DC magnetic field; the segments are located on opposite sides of the region. In one embodiment, wherein the excitation coil assembly is mounted independently of movement of an axis of the beam, the winding segments have a common axis generally aligned with an axis about which the beam axis turns. A treatment couch for the subject fits within aligned central openings of the winding segments. The coil produces main magnetic field lines that extend generally in the same direction as the axis about which the beam turns. In other embodiments, the coil assembly moves with the beam axis and the treatment couch is between the coil segments. In one such embodiment, each winding segment includes a central opening (1) through which the beam axis extends; and (2) generally aligned with magnetic field lines established by and extending between the segments. In another such embodiment, the beam axis extends through a space between the segments, being generally orthogonal to magnetic field lines established by and extending between the segments.

摘要翻译： 放射治疗机器束处理受试者的区域，而邻接该区域的区域和体积由磁共振成像系统成像。 光束和成像系统的激励线圈组件被布置成使得光束不入射到线圈组件上，并且从线圈组件导出的磁场不与光束相互作用。 励磁线圈组件包括用于产生主DC磁场的两个间隔开的绕组段; 这些段位于该区域的相对侧上。 在一个实施例中，其中激励线圈组件独立于梁的轴线的移动而被安装，所述绕组段具有大致与梁轴线所绕轴线对准的共同轴线。 用于该主体的治疗床适合绕组段的对准的中心开口。 线圈产生主要磁场线，其大致沿与光束转动的轴线相同的方向延伸。 在其他实施例中，线圈组件随着光束轴线移动，并且处理床位于线圈段之间。 在一个这样的实施例中，每个绕组段包括中心孔（1），梁轴线穿过该中心开口延伸; 和（2）通常与由段之间建立并在段之间延伸的磁场线对准。 在另一个这样的实施例中，射束轴线延伸穿过段之间的空间，其大体上正交于由段之间建立并在段之间延伸的磁场线。

公开(公告)号：US3979626A

公开(公告)日：1976-09-07

申请号：US562789

申请日：1975-03-27

申请人： Michael Curzon Green

发明人： Michael Curzon Green

IPC分类号： H01J23/083 ,  H01J1/53

CPC分类号： H01J23/083

摘要： In electron beam discharge tubes breakdown in the form of a gaseous arc can occur. An improved form of electrode which protects an insulating support against local high-stress fields is described. The electrode has a conductive shield extending to the other side of an interface between the electrode and the insulating support. A mechanism, the "single surface multipactor effect," which could cause the breakdown is also described.

摘要翻译： 在电子束放电管中可能发生气态弧形的击穿。 描述了保护绝缘支撑件抵抗局部高应力场的改进形式的电极。 电极具有延伸到电极和绝缘支撑件之间的界面的另一侧的导电屏蔽。 另外还描述了可能导致故障的“单面多反应器效应”的机理。