Patent ID: 9044599
Filing Date: 2015-06-02
Classification: A61N

Abstract:
1. A process for the deposition of an intended dose distribution in a cyclically moved target region by means of multiple irradiations with a beam irradiating matrix points of a target matrix in at least two scans by which in each of the scans matrix points are approached sequentially, characterized by the steps: establishing a maximal tolerance level for local deviation from the intended dose distribution, de-synchronizing the sequence of the irradiation and the cyclical motion of the target region, and partitioning the irradiation of the target region in a sufficient number of scans such that local deviations from the intended dose distribution due to movement of the cyclically moved target region at most correspond to the maximal tolerance level for local deviation from the intended dose distribution, wherein the motion is monitored and the irradiation is halted when the motion ceases for more than 50% of the cyclical motion.