2017 Imaging for Physicists Coursebook

Mid-Ventilation scan

Mid-ventilation

• GTV is defined on the mid-ventilation phase (phase closest to the mean position of the tumor) • Radiation treatment is possible during free breathing • A PTV margin surrounds the GTV for delivery uncertainties and breathing

Wolthaus et al. 2006. Int J Radiat Oncol Biol Phys. 65:1560-1571