66 / 1578
48% difference in dose
Reporting dose
I. Paddick
et al.
SBRT 2017 - D. Verellen
•
Dose prescription and margins in SRS
•
2 lesions, treated to
25Gy covering 97%
of the target
Ø
8mm ϕ lesion,
8mm collimator
,
25Gy @ 80%
:
§
D
max
= 31.3 Gy
/ D
mean
= 27.5Gy
Ø
11mm ϕ lesion,
8mm collimator
,
25Gy @ 50%
:
§
D
max
= 50.0 Gy
/ D
mean
= 35.0Gy
•
Same lesion, same dose prescription, variable isodose: