公开(公告)号：US12138482B2

公开(公告)日：2024-11-12

申请号：US17906147

申请日：2021-03-11

Applicant: Elekta Limited

Inventor： Martin Broad

IPC: A61N5/10

Abstract: A multi-leaf collimator module for a radiotherapy device comprises: a leaf bank comprising a plurality of leaves. The module also comprises a leaf guide arranged to guide linear movement of the leaves in a first direction and a second direction opposite the first direction, the leaf guide being in direct contact with the leaves. The module further comprises a plurality of leaf actuators, each leaf actuator arranged to engender relative linear motion in the first direction and second direction between one leaf in the leaf bank and other leaves in the leaf bank; and a leaf bank actuator arranged to engender relative linear motion in the first direction and second direction between the entire leaf bank and the leaf guide.

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.