534 / 1840
How big is 1mm in terms of Dose?
140
160
180
D90 (Gy) and V100 (%)
reference
D90
0
20
40
60
80
100
120
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
- 0 -9 -8 -7 -6 -5 -4 -3 -2 - 0 2 3 4 5 6 7 8 9 10
V100
Variation per mm
lateral
contour displacement*
D90: 3 % – 8 % (nominal
∼
0.5 – 2 Gy)
V100: up to 3%
Deviation fromReference Contour (mm)
*Estimation! Valid for this example
By courtesy of Petric