US 2025/0073499 A1 · QUALITY ASSURANCE FOR DOSING IN RADIOTHERAPY

Abstract

A computer-implemented method of determining dose delivered by a radiotherapy system to a plurality of locations within a region of patient anatomy includes: during a first time segment of a treatment fraction, causing the radiotherapy system to be in a first machine state; during the first time segment, delivering radiation to the region of patient anatomy; generating a first surface map for the region of patient anatomy based on surface measurements acquired during the first time segment; generating a first modified digital volume of the region based on the first surface map; and for each of the plurality of locations within the region of patient anatomy, determining a first radiation dose that is delivered to the location during the first time segment, wherein the first radiation dose is based on the first machine state of the radiotherapy system and the first modified digital volume.

Claims20

Dependent claims

A computer-implemented method of determining dose delivered by a radiotherapy system to a plurality of locations within a region of patient anatomy, the method comprising:

during a first time segment of a treatment fraction, causing the radiotherapy system to be in a first machine state;
during the first time segment, delivering radiation to the region of patient anatomy;
generating a first surface map for the region of patient anatomy based on surface measurements acquired during the first time segment;
generating a first modified digital volume of the region based on the first surface map;
and
for each of the plurality of locations within the region of patient anatomy, determining a first radiation dose that is delivered to the location during the first time segment, wherein the first radiation dose is based on the first machine state of the radiotherapy system and the first modified digital volume.

3 more elements

A computer-implemented method of radiotherapy for a plurality of locations within a region of patient anatomy, the method comprising:

determining a first total radiation dose that is delivered during a first treatment fraction to a first location included in the plurality of locations, wherein the first radiation dose is based on a first time-resolved machine state of the radiotherapy system associated with the first treatment fraction, and a time-resolved surface map of the region associated with the first treatment fraction;
based on the first total radiation dose, determining a dose error associated with the first location for the first treatment fraction;
based on the dose error, determining a second total radiation dose to be delivered to the first location in a second treatment fraction;
based on the second total radiation dose, changing a time-resolved machine state of the radiotherapy system associated with the second treatment fraction from an original time-resolved machine state to a modified time-resolved machine state;
and
delivering the second total radiation dose to the first location using the modified time-resolved machine state.

3 more elements

Dependencies are inferred from the claim text.

Quality assurance for dosing in radiotherapy

Life of this patent

Quality assurance for dosing in radiotherapy

Life of this patent

Abstract

Claims20