850 / 1544
Dx
Sx
T
G
1
1
2
2
3
3
-100 -50
0
50
100
-150
-100
-50
0
50
100
150
γ
<= 1
γ
<= 1.5
γ
> 1.5
0
0.5
1
1.5
2
2.5
3
0
20
40
60
80
100
120
γ
, parametri:
soglia 10 cGy
δ
r 3mm,
δ
d 3%
punti > soglia: 607
γ
medio = 0.44+- 0.4(1
dev.st.)
γ
<1: 554=> 91.3%
1 <
γ
<= 1.5: 32=> 5.3%
γ
> 1.5: 21=> 3.5%
∆
d (<10 cGy) = 2 cGy
γ ≤ 1: 91.3%, not great but not terrible either
But many points where γ>1 are in the cord region.
If there is overdosage, it may be clinically relevant
Combine Gamma analysis and
clinical judgment
L Marrazzo - Florence