SBRT 2016

A Practical Example: SBRT Lung Case

 T1 primary lung lesion: 3 x 18 Gy @ 80%  Alignment on time-averaged tumor position by CBCT  Tumor in lung tissue  E2E test device error (1 SD) = 0.4 mm (measured over a long period)  Localization (delineation) error = 2.0 mm (1 SD)  Systematic error = 1.0 mm (1 SD) [measured from 3-fraction treatments]  Random error = 1.0 mm (1 SD) [measured from 3-fraction treatments]  Intra-fraction amplitude = 1 – 25 mm