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Change of vs: Example Eclipse
PDD
Dose
∑
=
∆
+
∆
+
∆
+
∆
=
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%
{
}
∑
=
∆+ ∆+ ∆+ ∆+ ∆+ ∆
=
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
Utretch 2016
Profiles
Gamma 3%-3mm
Thanks to Artur Latorre-Mussoll Servei de Radiofisica Hospital Sant Pau
Vs 13.5 uses a
calculated
spectra while
the previous vs
use a theoretical
spectra.
∑
=
∆
=
N
i
D
N
I
1
2
abs
3
1