330 / 1024
ITV = internal target volume
•
ITV = margin for tumor motion added to CTV
•
ICRU 62: ”ITV = CTV + margin for uncertainties
in size, shape & position of CTV within the patient”
•
iGTV = sum of GTVs in al phases of 4DCT
•
ICRU 83:
”resulting PTVs were too big”