IGRT 2016 Madrid

Dosimetric consequences of errors in frame-less SRS

1,0

0,8

0,6

0,4

0,2

D95 GTV dose compared to treatment plan 0,0

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

Pre-treatment 3D error (cm)

D95 of GTV Av ± StDev

Planned

Pre T & R 78 ± 18%

Pre R

Post T & R

100% ± 0 99 ± 2% 100 ± 4% Excellent dosimetric accuracy with frame-less SRS and correction of translations only