942 / 1311
Conclusions: Target Volume Definition
GTV
:
•
only in preoperative, included in the CTV,
NO
boost volume
ITV
:
•
Movement is critical in
pre-operative or partial
gastrectomy
CTV
:
•
Modulated
: surgery, tumor site, tumor stage
•
Challenging
: CT axial anatomy (post-operative)
•
Variability
: large inter-observer also with GL