US 2020/0395142 A1 · METHOD AND APPARATUS OF CORRECTING COLLIMATOR OF RADIOTHERAPY EQUIPMENT

Abstract

Embodiments of the present disclosure provide a method and an apparatus of correcting a collimator, which may correct a position of a collimator of a gamma knife apparatus. The method includes: separately obtaining a projection image of rays sequentially passing through collimation holes and an isocenter plane in the collimator in cases where the collimator moves to M positions; determining a target position with a highest degree of alignment of the collimator from the M positions according to obtained projection images of rays; recording position parameters corresponding to the target position, so as to control the collimator to move to the target position in a case where the a gamma knife apparatus is used for treatment.

Claims16

Dependent claims

A method of correcting a collimator of radiotherapy equipment, the method comprising:

separately obtaining a projection image of rays sequentially passing through collimation holes in the collimator and an isocenter plane of the radiotherapy equipment in cases where the collimator moves to M positions, wherein the M positions include a design position of the collimator and at least one other position where a displacement difference from the design position is less than a preset distance, and the design position is a theoretical position of alignment of the collimator;
determining a target position with a highest degree of alignment of the collimator from the M positions according to obtained projection images of rays;
and
recording position parameters corresponding to the target position, so as to control the collimator to move to the target position in a case where the radiotherapy equipment is used for treatment.

1 more element

An apparatus of correcting a collimator of radiotherapy equipment, the apparatus comprising:

a communication interface configured to receive projection images of rays each sequentially passing through collimation holes in the collimator and an isocenter plane of the radiotherapy equipment in cases where the collimator moves to M positions, wherein the M positions include a design position of the collimator and at least one other position where a displacement difference from the design position is less than a preset distance, and the design position is a theoretical position of alignment of the collimator;
and
a processor connected to the communication interface, wherein the processor is configured to determine a target position with a highest degree of alignment of the collimator from the M positions according to obtained projection images of rays, and record position parameters corresponding to the target position.

Dependencies are inferred from the claim text.

Facts

Application

17/005,699Filed 28 Aug 2020

Priority

8 Aug 2018

Published

17 Dec 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

G21K 1/025
Using diaphragms, collimators: using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation
A61B 6/06
Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment: diaphragms
A61B 6/08
Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment: auxiliary…
A61B 6/545
Control of apparatus or devices for radiation diagnosis: involving automatic set-up of acquisition parameters

Method and apparatus of correcting collimator of radiotherapy equipment

Life of this patent

Method and apparatus of correcting collimator of radiotherapy equipment

Life of this patent

Abstract

Claims16