公开(公告)号：US20240075316A1

公开(公告)日：2024-03-07

申请号：US18260080

申请日：2021-12-17

Applicant: Elekta Limited

Inventor： David Roberts

IPC: A61N5/10

CPC classification number: A61N5/1047 ,  A61N5/1075 ,  A61N2005/1076

Abstract: Disclosed herein is a radiotherapy apparatus comprising a radiation source configured to emit a beam of radiation having a central axis, a multi-leaf collimator, MLC, for shaping the beam of radiation emitted by the radiation source, wherein the MLC comprises a plurality of leaves, and a detection device for detecting radiation emitted by the radiation source. The detection device comprises a first detector arranged to detect a position of the central axis, wherein the first detector comprises a two dimensional array of pixels for generating a two dimensional map of radiation intensity, and at least one second detector arranged to detect a position of each leaf of the plurality of leaves.

公开(公告)号：US20240115882A1

公开(公告)日：2024-04-11

申请号：US18309114

申请日：2023-04-28

Applicant: Elekta Limited

Inventor： Joshua Freedman ,  Fabienne Lathuiliere ,  Kevin John Brown ,  David Roberts ,  Sebastien Tremblay

IPC: A61N5/10

CPC classification number: A61N5/1049 ,  A61N5/1065 ,  A61N2005/1055 ,  A61N2005/1089

Abstract: Devices, systems and techniques are used for cancer treatment. An example control device may be configured to be communicatively coupled to a radiation source of a radiotherapy device and a position sensor of the radiotherapy device. The example control device may be used to calculate, for a sliding window of a radiotherapy treatment, a positional error between: a measured target position signal determined from a series of images and sampled at the acquisition times of the images, and an estimated target position signal. The example control device may generate a computer-executable instruction configured to alter the radiotherapy treatment in response to the positional error violating a threshold.

公开(公告)号：US20230310898A1

公开(公告)日：2023-10-05

申请号：US18181281

申请日：2023-03-09

Applicant: Elekta Limited

Inventor： Joshua Freedman ,  David Roberts ,  Christopher Knox

IPC: A61N5/10

CPC classification number: A61N5/1075 ,  A61N5/1049 ,  A61N2005/1076

Abstract: A quality assurance method for a radiotherapy device is disclosed. The method comprises disposing a phantom on a patient couch of the radiotherapy device, moving the patient couch to simulate motion of a subject, determining a measured value associated with the phantom, and comparing the measured value to an expected value. A radiotherapy device is also disclosed, the radiotherapy device comprising a radiation source configured to apply a radiation beam, a patient couch, a phantom disposable on the patient couch, and a controller communicatively coupled to the patient couch. A computer-readable medium storing instructions is also disclosed. A phantom for a radiotherapy device is also disclosed.

公开(公告)号：US20230173305A1

公开(公告)日：2023-06-08

申请号：US17998446

申请日：2021-05-11

Applicant: Elekta Limited

Inventor： David Roberts ,  John Allen

IPC: A61N5/10

CPC classification number: A61N5/1075 ,  A61N5/1071 ,  A61N2005/1059

Abstract: Systems and methods are disclosed for detecting Cherenkov radiation produced during radiotherapy. A radiotherapy system comprises a patient receiving space for receiving a patient, a therapeutic radiation source, and a light detector configured to detect Cherenkov radiation subsequent to the emission of therapeutic radiation. Optionally, the system may make use of a optically transmissive dielectric to produce Cherenkov radiation.

公开(公告)号：US20230028022A1

公开(公告)日：2023-01-26

申请号：US17757520

申请日：2020-12-16

Applicant: Elekta Limited

Inventor： Joshua Freedman ,  David Roberts ,  Stefan Pencea

IPC: A61N5/10

Abstract: Disclosed herein is a method of characterising physical properties of an attenuating element in a radiotherapy device having a radiotherapy radiation source and a radiotherapy radiation detector on respective sides of the attenuating element. The method comprises obtaining an average detected radiotherapy radiation intensity at two or more locations around the attenuating element, comparing the detected intensity at one location with the average intensity, and characterising a corresponding physical property based on the comparison.

公开(公告)号：US20250099783A1

公开(公告)日：2025-03-27

申请号：US18473656

申请日：2023-09-25

Applicant: Elekta Limited

Inventor： Joshua Freedman ,  Fabienne Lathuiliere ,  Martin Emile Lachaine ,  David Roberts

IPC: A61N5/10 ,  G06T5/00 ,  G06T7/13 ,  G06T7/73 ,  G16H20/40 ,  G16H30/40

Abstract: There are provided systems, methods and radiotherapy devices for monitoring the position of a subject during radiotherapy, which comprise obtaining an MR image slice of a subject that exhibits through-plane distortion, obtaining a pre-treatment image slice of the subject that corresponds to the MR image slice and exhibits through-plane distortion that corresponds to the through-plane distortion of the MR image slice, and comparing the MR image slice with the corresponding pre-treatment image slice.

公开(公告)号：US20250121209A1

公开(公告)日：2025-04-17

申请号：US18915420

申请日：2024-10-15

Applicant: Elekta Limited

Inventor： Joshua Freedman ,  Patrick GROSS ,  David Roberts ,  Bjorn STEMKENS

IPC: A61N5/10 ,  G16H40/63

Abstract: A computer implemented method for modifying medical imaging protocol parameters can comprise receiving one or more modified protocol parameters for an imaging protocol and determining whether the one or more modified protocol parameters are acceptable based on at least one of: i) an acquired image acceptability check or ii) a parameter acceptability check.

公开(公告)号：US20240100364A1

公开(公告)日：2024-03-28

申请号：US18477115

申请日：2023-09-28

Applicant: Elekta Limited

Inventor： Christopher Knox ,  Joshua Freedman ,  Kevin John Brown ,  David Roberts

IPC: A61N5/10 ,  G06F1/12 ,  G16H40/63

CPC classification number: A61N5/1068 ,  A61N5/1077 ,  G06F1/12 ,  G16H40/63 ,  A61N2005/1055 ,  A61N2005/1074

Abstract: Timing-based methods, systems, and computer readable mediums for a gated linear accelerator include synchronising a local clock of the linear accelerator with a clock of a patient monitoring system, determining latencies within one or more MR-gated radiotherapy processes and implementing latency based interlocks.

公开(公告)号：US10818404B2

公开(公告)日：2020-10-27

申请号：US16212078

申请日：2018-12-06

Applicant: Elekta Limited

Inventor： Stephen Towe ,  Begoña Vivas-Maiques ,  Janusz Harasimowicz ,  David Roberts

IPC: A61N5/10 ,  G21K1/04

Abstract: A method of determining the shape of a radiation beam of a radiotherapy system at a treatment position, the system comprising a radiation source and a multi-leaf collimator disposed between the radiation source and the treatment position. The multi-leaf collimator includes an array of moveable leaves positioned to intersect and block parts of the radiation beam to define the shape of the radiation beam at the treatment position. The leaves of a group are aligned such that the planes of the leaves in that group converge at a point displaced laterally from the radiation source. The method includes, for each leaf in the array positioned to intersect the radiation beam, determining a projected width with respect to the radiation beam, the projected width being greater than the thickness of the respective leaf, and using the projected leaf width to determine the shape of the radiation beam at the treatment position.