404 / 1138
Systematic Errors Only (M
sys
= 2.5
S
)
The systematic set-up errors are described by a 3D Gaussian distribution
How to choose M
sys
to ensure a high probability that the prescribed dose is
delivered to the CTV?
Choice:
for 90% of all possible systematic set-up errors, the full CTV is within
the PTV (=95% isodose)
95%