How do you approach treatment planning for preoperative radiation therapy in gastric cancer?

At MD Anderson, we treat nearly all gastric patients using a neoadjuvant strategy. I've outlined our approach below:

For simulation- NPO 3 hours, 4DCT

For target delineation-

iGTV (from PET, endoscopy report, etc).

Mucosal margin expansion = 3cm along the mucosal axis (sup, inf and into the uninvolv...