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Consequences for GTV delineation:
I
Stage I / SABR:
―
Delineation on CT of all (8) phases of the respiratory cycle
―
ITV generated on 3D-FDG-PET is NO surrogate!!
―
Automatically segmented 4D-FDG-PET may provide additional information
I
Advanced stage:
―
Delineation of target volume on CT of 3 respiratory phases – i.e.,
0%/50%/100% exspiration
―
FDG-PET provides additional information, e.g. Atelectasis.
Respiration correlated FDG-PET/CT
Troost
et al.
, in preparation