Patent ID: 8927921
Filing Date: 2015-01-06
Classification: A61N

Abstract:
1. A method for performing composite dose quality assurance with a three-dimensional (3D) radiation detector array, the method comprising: delivering, from a moving radiation source, a radiation fraction to the 3D array according to a radiation treatment (RT) plan; measuring absolute dose per detector of the 3D array, per unit of time; determining a radiation source emission angle per unit of time; synchronizing the RT plan with the measured absolute doses and determined radiation source emission angles to determine an absolute time for a control point of each beam of the synchronized RT plan; converting the beams of the synchronized RT plan into a series of sub-beams; generating a 3D relative dose grid for each of the sub-beams; applying a calibration factor grid to each of the 3D relative dose grids to determine a 3D absolute dose grid for each of the sub-beams; summing the 3D absolute dose grids to generate a 3D absolute dose deposited in the 3D array; and determining a 3D dose correction grid for application to the RT plan based on the 3D absolute dose.