CTV =
Prostate contour: 100 %
PTV = CTV + margin
Prostate + 0 mm = 18/49
Prostate + margin = 31/49
base :
0 mm = 13
3 – 5 mm = 25
> 5mm = 5
midgland: 0 mm= 13
3 – 5 mm = 28
> 5 mm = 0
apex :
0 mm = 13
3 – 5 mm = 27
> 5 mm = 1
Questionnaire
(49 European brachytherapy centers –
2007
):