Electron Isodose Curves Flashcards
1
Q
For 6MV electron beam (SSD100, 10x10cm field): SD ZMax preD90 postD90 R50 R10 Brem Tail
A
SD = 75% Max = 1.5 preD90 = 0.8 postD90 = 2 R50 = 2.5 R10 = 3
Tail = 0.5%
2
Q
For 9MV electron beam (SSD100, 10x10cm field): SD ZMax preD90 postD90 R50 R10 Brem Tail
A
SD = 83% preD90 = 1 ZMax = 2 postD90 = 3 R50 = 3.5 R10 = 4.5
Tail = 1%
3
Q
For 12MV electron beam (SSD100, 10x10cm field): SD ZMax preD90 postD90 R50 R10 Brem Tail
A
SD = 83% preD90 = 0.5 ZMax = 3 postD90 = 4 R50 = 5 R10 = 6
Tail = 2%
4
Q
For 20MV electron beam (SSD100, 10x10cm field): SD ZMax preD90 postD90 R50 R10 Brem Tail
A
(Note 16Mev looks similar) SD = 95% preD90 = NA ZMax = 2.3!!! Broad postD90 = 6 R50 = 8.5 R10 = 10.5
Tail = 5%
