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Gross tumor volume (GTV) (ICRU 83)
•
Gross demonstrable extent and location of the tumor
(lymphoma)
•
Original (before any treatment) lymphoma: pre-chemo GTV
–
Seen on CT: pre-chemo GTV(CT)
–
Seen on FDG-PET: pre-chemo GTV(PET)
•
Residual (after systemic treatment) lymphoma: post-chemo
GTV
–
Seen on CT: post-chemo GTV(CT)
–
Seen on FDG-PET: postchemo GTV(PET)