From: Dosimetric impact of target definitions on normal structures in head and neck cancer
 | RTOG | 3Dose |
---|---|---|
PTV-HD | (GTV + 1 cm) + 0.3 - 0.5 cm | GTV + 0.5 cm |
PTV-ID | None | (GTV + 1 cm) + 0.3 - 0.5 cm |
PTV-ED | ((GTV + 2 cm) + elective nodes)) + 0.3 - 0.5 cm | Elective nodes + 0.3 - 0.5 cm |