1266 / 1481
PTV
•
CTV + 0.5-1 cm in all directions
•
Distal tumors:
respiratory motion (3D or IMRT)
–
4D CT imaging for superior-inferior motion
–
If > 1 cm: Respiratory gating or abdominal
compression
Gastric filling: intra-fraction movements
Nothing by mouth before simulation and
each treatment
Wu AJ et Al – Int J Radiat Oncol Biol Phys– 2015