SBRT 2016

A Practical Example: SRT Case

 Intracranial lesion: 3 x 8 Gy @ 80%  SD of the penumbra is 3.2 mm  E2E test device error (1 SD) = 0.4 mm (measured over a long period)  Localization (delineation) error = 1.0 mm (1 SD)  Systematic error = 0.5 mm (1 SD) [measured from 30-fraction treatments]  Random error = 0.5 mm (1 SD) [measured from 30-fraction treatments]  Intra-fraction error = 0.5 mm ( 1 SD) [measured from 30-fraction treatments at end of treatment]