Patent ID: 8160204
Filing Date: 2012-04-17
Classification: A61N

Abstract:
1. A method for radiation therapy apparatus verification comprising the steps of: providing a radiation therapy apparatus for delivery of a radiation beam, said radiation therapy apparatus being configurable for a given radiation treatment; providing a description or an image of a target, said description or image comprising a 3D shape, density distribution and position of said target; providing an electronic detector device configured to provide measured 2D detector responses of said radiation beam in a plane perpendicular to said radiation beam; providing a beam model of said radiation therapy apparatus, said beam model being based on a set of machine parameters and on a set of beam model parameters; providing values for said set of machine parameters and for said set of beam model parameters defining a set configuration; irradiating with said radiation therapy apparatus having said set of machine parameters, and providing measured 2D detector responses caused by said radiation beam for each set configuration; reconstructing delivered photon fluence distributions corresponding to the radiation beam, based on the measured 2D detector responses, on a fluence algorithm, on said set of machine parameters, on said set of beam model parameters and on said beam model; and computing 3D delivered dose distributions based on said reconstructed delivered fluence distributions, on a dose algorithm and on said description or image of the target.