Particle Therapy 2017

‹#› Practical considerations for lung planning… • 4D simulation with PET/CT fusion: Limit patient acceptance to < 1 cm respiratory tumor excursion • ITV • Expand ITV + 7mm= CTV • CTV + 5mm= PTV • Typically use 3 beams (can treat 2 fields/day) • Limit 1/3 of the beams to range into critical structure (cord/esophagus/ heart etc)