公开(公告)号：US20230087238A1

公开(公告)日：2023-03-23

申请号：US17759585

申请日：2021-01-29

Applicant: Elekta Limited

Inventor： Martin Broad ,  Ralf SPRIESTERSBACH ,  Christopher Knox

IPC: A61N5/10

Abstract: A computer-implemented method for calibrating a multi-leaf collimator of a radiotherapy device. The multi-leaf collimator comprises a plurality of leaves, each leaf comprising an imaging marker, wherein the radiotherapy device includes an imaging device configured to image the leaves. The method comprises: receiving, from the imaging device, an image of the multi-leaf collimator in a calibration position, wherein in the calibration position the tips of the leaves abut an edge of a rigid calibration block, the edge having a known calibration profile; calculating for each leaf, from the calibration profile and the location of the marker in the image, a minor offset of the marker relative to a reference point; and outputting calibration values based on the calculated minor offsets, wherein at least one leaf of the multi-leaf collimator is controlled based on the calibration values.

公开(公告)号：US20240005527A1

公开(公告)日：2024-01-04

申请号：US18253849

申请日：2021-11-26

Applicant: Elekta Limited

Inventor： Kjell Eldered ,  Christopher Knox ,  James Goody

IPC: G06T7/246 ,  G06T7/73 ,  G06T7/00 ,  G06T5/00

CPC classification number: G06T7/248 ,  G06T7/74 ,  G06T7/0002 ,  G06T5/001 ,  G06T2207/30204 ,  G06T2207/10088 ,  A61N5/1077

Abstract: A method of identifying image shift comprises identifying a position of a reference element in a captured image, comparing the identified position with a predetermined expected position, and identifying image shift if the compared positions do not match.

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：US12296193B2

公开(公告)日：2025-05-13

申请号：US17759585

申请日：2021-01-29

Applicant: Elekta Limited

Inventor： Martin Broad ,  Ralf Spriestersbach ,  Christopher Knox

IPC: A61N5/10

Abstract: A computer-implemented method for calibrating a multi-leaf collimator of a radiotherapy device. The multi-leaf collimator comprises a plurality of leaves, each leaf comprising an imaging marker, wherein the radiotherapy device includes an imaging device configured to image the leaves. The method comprises: receiving, from the imaging device, an image of the multi-leaf collimator in a calibration position, wherein in the calibration position the tips of the leaves abut an edge of a rigid calibration block, the edge having a known calibration profile; calculating for each leaf, from the calibration profile and the location of the marker in the image, a minor offset of the marker relative to a reference point; and outputting calibration values based on the calculated minor offsets, wherein at least one leaf of the multi-leaf collimator is controlled based on the calibration values.

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：US20230381538A1

公开(公告)日：2023-11-30

申请号：US18246721

申请日：2021-09-30

Applicant: Elekta Limited

Inventor： Christopher Knox

IPC: A61N5/10

CPC classification number: A61N5/1031 ,  A61N5/1037 ,  A61N2005/1072

Abstract: Disclosed herein is a computer-implemented method of determining a control scheme for operating a radiotherapy device for delivery of a radiation dose via a radiotherapy treatment beam to a target. The radiotherapy device comprises abeam generation apparatus that is configured to output radiation via a radiotherapy treatment beam, and wherein operation of the radiotherapy device can be described using at least one operational parameter. The method comprises determining the control scheme by identifying a first time (t1) at which at least a first portion of the radiation dose is to be delivered at a first radiation delivery rate; and identifying a second time (t2) for the radiotherapy device to undergo a cool-down period, wherein during the cool-down period the radiation delivery rate is less than the first radiation delivery rate; wherein the control scheme is determined such that at least one criterion associated with the at least one operational parameter is met.