Table 2 Comparison of the target volume protocols for Hospital A & B
From: A comparison of two systems of patient immobilization for prostate radiotherapy
| Â | Hospital A | Hospital B |
|---|---|---|
GTV | Prostate | N.A. |
CTV | Prostate + proximal bilateral seminal vesicle (SV) | Prostate (+ whole SV if involved) |
PTV | CTV + 1 cm (0.5 cm for posterior margin) | CTV + 0.5 to 1 cm (1 cm margin is usually used except 0.6 cm posteriorly) |