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.

Abstract: A computer-implemented method of radiotherapy for a plurality of locations within a region of patient anatomy includes: determining a first radiation dose that is delivered during a first time segment of a treatment fraction to a first location included in the plurality of locations, wherein the first radiation dose is based on a first machine state of the radiotherapy system associated with the first time segment and a first surface map of the region associated with the first time segment; based on the first radiation dose, determining a dose error associated with the first location for the first time segment; based on the dose error, determining a second radiation dose to be delivered to the first location in a second time segment of the treatment fraction; based on the second radiation dose, changing a second machine state of the radiotherapy system associated with a second time segment to a third machine state of the radiotherapy system; and delivering the second total radiation dose to the first location

Abstract: These teachings provide for accessing optimization information comprising at least one isocenter that corresponds to a body outline for a particular patient, field geometry information for a particular radiation treatment platform, and dosimetric data. The optimization information can further comprise a model of a body outline for the patient. A control circuit optimizes a radiation treatment plan as a function of the optimization information to provide an optimized radiation treatment plan where radiation dose levels delivered to the particular patient from a particular field depends on the relative volume magnitude of field path intersections to thereby reduce radiation dose delivery to healthy patient tissue in regions having relatively more overlapping fields.

Abstract: These teachings provide for accessing optimization information comprising at least one isocenter that corresponds to a body outline for a particular patient, field geometry information for a particular radiation treatment platform, and dosimetric data. The optimization information can further comprise a model of a body outline for the patient. A control circuit optimizes a radiation treatment plan as a function of the optimization information to provide an optimized radiation treatment plan where radiation dose levels delivered to the particular patient from a particular field depends on the relative volume magnitude of field path intersections to thereby reduce radiation dose delivery to healthy patient tissue in regions having relatively more overlapping fields.