Physics Bucharest 2017

6/3/2017

By computing the score for a set of candidate directions, the ideal irradiation angle for target voxel i is defined as the direction with the minimum score. Distance along ray Dose Beam angle optimization with a patient specific score for every target voxel… OAR Targe t OAR Normal Tissue D NT D NT D Target D OAR Target voxel i Direction j

41

Courtesy of Uwe Oelfke

Treatment plan comparison for a prostate lesion – 9 coplanar equi-spaced beams versus 9 non-coplanar beams

■ 9 coplanarequi-spaced beams ■ 9 optimized beams

42

Courtesy of Uwe Oelfke