1213 / 1359
Change of vs: Example Eclipse
PDD
Profiles
Dose
Gamma 3%-3mm
Thanks to Artur Latorre-Mussoll Servei de Radiofisica Hospital Sant Pau
=
+
+
+
=
N
i
i
D
D
z
z
N
I
1
2
20
2
10
2
50
2
max
1
%1
%1
mm1
mm1
4
1
6 MV X-rays
PDD differences
up to 8mm and
3%.
MU differences
up to 2%
Vs 13.5 uses a
calculated
spectra while
the previous vs
use a theoretical
spectra.
=
+ + +
+
+
=
N
i
i
d d d
d
d
d
N
I
1
2
80
2
50
2
20
2
80
2
50
2
20
2
'
'
'
6
1
=
=
N
i
D
N
I
1
2
abs
3
1