710 / 1578
•
Conformity:
Ø
Ratio of volume receiving
PD
over volume PTV
SBRT 2017 - D. Verellen
Volume sphere
,100%
PD
(
)
Volume PTV
(
)
=
Volume sphere
, 48
Gy
(
)
Volume PTV
(
)
=
49.8
cm
3
39.8
cm
3
=
1.25
(
< 1.2 [1.2 – 1.5]
)
PTV &
tissue heterogeneity &
dose prescription