SYSTEM AND METHOD FOR ESTIMATING AND MANIPULATING ESTIMATED RADIATION DOSE

摘要

Methods are provided for permitting manipulation of an achievable dose distribution estimate deliverable by a radiation delivery apparatus for proposed treatment of a subject. One such method comprises: determining a dose modification voxel for which it is desired to modify the dose value and a corresponding magnitude of desired dose modification; for each of a plurality of beams: (i) characterizing the beam as a two-dimensional array of beamlets, wherein each beamlet is associated with a corresponding intensity value and a ray line representing the projection of the beamlet into space; and (ii) identifying one or more dose-change beamlets which have associated ray lines that intersect the dose modification voxel; modifying the intensity values of at least one of the dose-change beamlets; and updating the achievable dose distribution estimate to account for the modified intensity values of the at least one of the dose-change beamlets.

主权项

1. A method for permitting manipulation of an achievable dose distribution estimate deliverable by a radiation delivery apparatus for proposed treatment of a subject, the achievable dose distribution estimate defined over a three-dimensional range of voxels with a dose value for each voxel, the method comprising:
(a) determining a dose modification voxel for which it is desired to modify the dose value and a corresponding magnitude of desired dose modification; (b) for each of a plurality of beams:
(i) characterizing the beam as a two-dimensional array of beamlets, wherein each beamlet is associated with a corresponding intensity value and a ray line representing a projection of the beamlet into space; and(ii) identifying one or more dose-change beamlets which have associated ray lines that intersect the dose modification voxel; (c) modifying the intensity values of at least one of the dose-change beamlets; and (d) updating the achievable dose distribution estimate to account for the modified intensity values of the at least one of the dose-change beamlets.