1232 / 1245
Total margin
03/01/13
=
Σ
+ = 2.5Σ + 1.64
Σ = Σ
2
+ Σ
2
+ Σ
2
=
2
+
2
+
2
−
=
Σ
+ = 2.5Σ + 0.7 ′
′ =
2
+
2
′ cm
0.7 ′
1.64 ′
2
+ 0.32
2
− 0.32
A 5 mm distance between the
95% and 50% isodose surface
corresponds to
s
p
=3.2 mm