2017_SBRT_Course Book

Gating: free breathing / breath hold

Motion amplitude PTV volume Duty cycle 30 % !

Gating : Reduction of motion amplitude 8.5mm ± 6.5m to 1.4mm ± 0.7mm

ITV from all phases PTV = ITV + 5mm

ITV from 3 / 10 phases PTV = ITV + 5mm Gating : Reduction of PTV volume by 45%

Underberg et al IJROBP 2005 SBRT 2017 - D. Verellen