Physics Bucharest 2017

Volume definition: Planning Target Volume (PTV)

ICRU

Uncertainties Biological + repositioning

Report 29 (1978) – 2D RT

TV Target Volume

Report 50 (1993) – early 3D RT

CTV Clinical Target Volume PTV Planning Target Volume CTV Clinical Target Volume ITV Internal Target Volume PTV Planning Target Volume

Biological

Repositioning

Report 62 (1999) – advanced 3D RT

Biological Subclinical extension

Organ motion Respiration – Bowel - Bladder

Repositioning Set-up

PTV is a geometrical concept