公开(公告)号：US20220231421A1

公开(公告)日：2022-07-21

申请号：US17595888

申请日：2020-05-29

申请人： Elekta Limited

发明人： Ian Shinton ,  Emma Wooldridge

IPC分类号： H01Q13/18 ,  H01P1/08

摘要： Disclosed is an RF window. The RF window comprises a first and a second cavity and a plate of dielectric material positioned there between. At least one of the first and second cavities comprises a taper, beginning at the plate, such that the at least one of the first and second cavities reduces in diameter in a direction away from the plate.

公开(公告)号：US20230380049A1

公开(公告)日：2023-11-23

申请号：US18247992

申请日：2021-10-08

申请人： ELEKTA LIMITED

发明人： Ian Shinton ,  Peter Doherty ,  Emma WOOLRIDGE

IPC分类号： H05H9/02 ,  H01J25/54 ,  H01J23/207

CPC分类号： H05H9/02 ,  H01J25/54 ,  H01J23/207 ,  H05H2277/11

摘要： A method of determining a design of a transmission waveguide, the method comprising: providing a system comprising a transmission waveguide connected at a first end thereof to an RF source; generating an electromagnetic field in the system by application of RF energy of a harmonic frequency of the RF source to the transmission waveguide; determining whether a reference location in the RF source meets a requirement relating directly or indirectly to an electromagnetic field in the RF source; and if the requirement is met, outputting the current design of the transmission waveguide as its design.

公开(公告)号：US20230019382A1

公开(公告)日：2023-01-19

申请号：US17757680

申请日：2020-12-18

申请人： Elekta Limited

发明人： Peter Doherty ,  Emma Woolridge ,  Ian Shinton

IPC分类号： H05H7/08 ,  H05H9/04 ,  H05H7/04 ,  H05H7/12

摘要： A particle accelerator comprising a waveguide comprising a series of acceleration cells. The series of acceleration cells comprise an input acceleration cell configured to accelerate a beam of electrons along the central axis of the cells. A source of electrons is configured to input a beam of electrons into the input acceleration cell and a magnet arrangement is configured to prevent electrons that have deviated from the beam of electrons from hitting the source of electrons.

公开(公告)号：US20230232523A1

公开(公告)日：2023-07-20

申请号：US17997714

申请日：2021-04-30

申请人： Elekta Limited

发明人： Ian Shinton

IPC分类号： H05H7/16 ,  H01P3/127

CPC分类号： H05H7/16 ,  H01P3/127 ,  H05H2277/11

摘要： Disclosed herein is a waveguide cell having a helical cavity. The waveguide cell has a central axis and a cavity having a transverse cross section whose rotational position about the central axis varies along the central axis. There is also disclosed a method a determining the shape of a waveguide cell.

公开(公告)号：US11850446B2

公开(公告)日：2023-12-26

申请号：US17250393

申请日：2019-07-15

申请人： Elekta Limited

发明人： Ian Shinton ,  Janusz Harasimowicz ,  George Chadwick ,  Paul Dixon

IPC分类号： A61N5/10

CPC分类号： A61N5/1049 ,  A61N5/1081 ,  A61N2005/1055 ,  A61N2005/1094

摘要： A radiotherapy apparatus adapted for use with a Magnetic Resonance Imaging (MRI) system, the radiotherapy apparatus comprising a linear accelerator, the linear accelerator including an electron source. In the linear accelerator electrons which are introduced by the source are accelerated to impact on a target and produce a beam of radiotherapeutic radiation. The linear accelerator has an accelerator waveguide within which the electrons are accelerated and an external waveguide enclosure; this enclosure extends substantially continuously over the accelerator waveguide. The waveguide enclosure is formed of a high magnetic permeability material and has a first aperture for the beam of radiotherapeutic radiation where the beam exits the waveguide enclosure and enters the MRI system and a second aperture for an RF guide for the introduction of electrons into the accelerator waveguide and for electrical lines for the particle source and coolant lines for the waveguide to pass through the enclosure and no other openings. The waveguide enclosure is preferably fabricated in a plurality of discrete parts.

公开(公告)号：US20230262868A1

公开(公告)日：2023-08-17

申请号：US18005541

申请日：2021-07-15

申请人： Elekta Limited

发明人： Ian Shinton ,  Duncan Bourne ,  Peter Doherty ,  Emma Woolridge

IPC分类号： H05H7/04 ,  H05H9/00 ,  H05H7/08 ,  H05H7/06 ,  H05H7/16 ,  A61N5/10

CPC分类号： H05H7/04 ,  H05H9/00 ,  H05H7/08 ,  H05H7/06 ,  H05H7/16 ,  A61N5/1077 ,  H05H2277/11 ,  H05H2007/045 ,  H05H2007/084 ,  H05H6/00

摘要： A particle accelerator comprises a waveguide configured to accelerate a beam of electrons along an acceleration path. A diversion channel is configured to convey a beam of electrons along a diversion path. A first magnet arrangement is configured to, at a first location, direct electrons from the acceleration path to the diversion path. A second magnet arrangement is configured to, at a second location, direct electrons from the diversion path to the acceleration path.

公开(公告)号：US20230239991A1

公开(公告)日：2023-07-27

申请号：US18000052

申请日：2021-05-28

申请人： Elekta Limited

发明人： Ian Shinton ,  Shaikh Mohammad Ismail Abdul GAFFAR

IPC分类号： H05H7/22 ,  H05H9/00 ,  H05H7/02 ,  H01P1/04 ,  H01P3/12 ,  A61N5/10

CPC分类号： H05H7/22 ,  H05H9/00 ,  H05H7/02 ,  H01P1/042 ,  H01P3/12 ,  A61N5/1078 ,  H05H2007/025 ,  H05H2277/11 ,  A61N2005/1095

摘要： A reusable joint for a medical linac, a reusable CF choke flange for a medical linac, a linac and a method for forming a reusable joint for a medical linac are disclosed. The reusable joint comprises a CF choke flange, a CF cover flange and a gasket. The CF choke flange comprises a first waveguide aperture, a choke groove and a first CF groove comprising a first knife-edge, wherein the choke groove is disposed radially inwards from the first CF groove on the CF choke flange. The CF cover flange comprises a second waveguide aperture aligned with the first waveguide aperture and a second CF groove comprising a second knife-edge and aligned with the first CF groove. The gasket is disposed between and in contact with the first CF groove and the second CF groove.

公开(公告)号：US20210290978A1

公开(公告)日：2021-09-23

申请号：US17250393

申请日：2019-07-15

申请人： Elekta Limited

发明人： Ian Shinton ,  Janusz Harasimowicz ,  George Chadwick ,  Paul Dixon

IPC分类号： A61N5/10

摘要： A radiotherapy apparatus adapted for use with a Magnetic Resonance Imaging (MRI) system, the radiotherapy apparatus comprising a linear accelerator, the linear accelerator including an electron source. In the linear accelerator electrons which are introduced by the source are accelerated to impact on a target and produce a beam of radiotherapeutic radiation. The linear accelerator has an accelerator waveguide within which the electrons are accelerated and an external waveguide enclosure; this enclosure extends substantially continuously over the accelerator waveguide. The waveguide enclosure is formed of a high magnetic permeability material and has a first aperture for the beam of radiotherapeutic radiation where the beam exits the waveguide enclosure and enters the MRI system and a second aperture for an RF guide for the introduction of electrons into the accelerator waveguide and for electrical lines for the particle source and coolant lines for the waveguide to pass through the enclosure and no other openings. The waveguide enclosure is preferably fabricated in a plurality of discrete parts.