Patent ID: 7207715

Claim:
A method for aligning radiotherapeutic beams from a generator thereof to a patient location that is linearly translatable along and rotatable around x, y, and z axes to correct for any radiotherapeutic beam deviations between a planned patient beam dosimetric treatment coordinate and an actual patient beam dosimetric treatment coordinate, comprising the steps of a. transforming at least one beam coordinate of a radiotherapeutic beam generation coordinate system to said planned patient beam dosimetric treatment coordinate system to provide a transformed patient beam generation coordinate system; b. transforming at least one of said beams from said planned patient beam dosimetric treatment coordinate system to a patient beam dosimetric treatment coordinate system identified at the time of patient treatment; and c. transforming at least one of said beams of said transformed patient beam dosimetric treatment coordinate system to said transformed beam generation coordinate system to provide an actual patient beam generation coordinate system for radiotherapeutic treatment and adjusting the radiotherapeutic beam generation to said patient treatment location as determined by said transformations.