980 / 1708
GTV1, CTV1, and PTV1 are defined
•
45 Gy in 1.8 Gy are delivered based on pre-chemo extent
GTV2 defined as residual visible or palpable tumor by
imaging or physical exam
•
For unresected or partially resected tumors, GTV2 includes
pre-treatment abnormalities in bone and gross tumor in soft
tissue post-chemo
•
CTV2=GTV2 + 1 cm
•
PTV2 = 10.8 Gy for total of 55.8 Gy
Post-op RT: 50.4 Gy for R1 and 55.8 Gy for R2
Radiation Dose – Current COG Protocol