1376 / 1601
Margins
•
CTV Margins: less relevant - PTV always overlaps
the GI OARs, so dose is limited by this proximity.
•
Creates a dose gradient that is adjusted by
normal tissue position on daily basis
Stomach
Duodenum
Small intestine
Pancreas
3 mm
plan
Stomach
Duodenum
Small intestine
Pancreas
5 mm
plan