Abstract: Techniques for particle beam therapy include receiving a target region inside a subject for particle therapy, a minimum dose inside the target region, and a maximum dose inside the subject but outside target region. Multiple beam axis angles are determined, each involving a gantry angle and a couch position. Multiple spots within the target region are determined. For each beam axis angle a pristine particle scan beam (not coaxial with any other particle scan beam) is determined such that a Bragg Peak is directed to a spot, and repeated until every spot is subjected to a Bragg Peak or an intersection of two or more such pristine scan beams. Output data indicating the pristine beamlets is stored for operation of a particle beam therapy apparatus.

Abstract: Techniques for particle beam therapy include receiving a target region inside a subject for particle therapy, a minimum dose inside the target region, and a maximum dose inside the subject but outside target region. Multiple beam axis angles are determined, each involving a grantry angle and a couch position. Multiple spots within the target region are determined. For each beam axis angle a pristine particle scan beam (not coaxial with any other particle scan beam) is determined such that a Bragg Peak is directed to a spot, and repeated until every spot is subjected to a Bragg Peak or an intersection of two or more such pristine scan beams. Output data indicating the pristine beamlets is stored for operation of a particle beam therapy apparatus.