Patent ID: 8916838
Filing Date: 2014-12-23
Classification: A61N

Abstract:
1. A method for irradiating with a particle beam ( 50 ) a plurality of spots in a layer ( 65 ) of a target ( 60 ), said method comprising the steps of: providing a particle therapy system ( scanning the particle beam over the layer a prescribed number of layer scanning times (Nlayer_painting), irradiating selected spots of said layer in the course of each said layer scanning time with partial spot doses (Dspot_partial), characterized in that, for each spot of the layer ( a) making each of the partial spot doses (Dspot_partial) larger or equal to Dmin, b) making the sum of all partial spot doses (Dspot_partial) equal to a prescribed total spot dose (Dspot), and c) making Nspot_painting=Nlayer_painting if Nspot/Nlayer_painting>=Dmin, else making Nspot_painting<Nlayer painting.