Physics Bucharest 2017
Electrons Energy - Range
• Maximum range: R max • Practical range: R p • R90, R80 and R50
R 100
E≈2R p E≈2,8R 80 E≈3,2R 90
100
90
Therapeutic range
Surface dose
80
70
60
R 50
50
%DD
40
30
x-ray component
20
R p
10
z max
0
0 1
2 3 4 5 6 7 8 9 10 11 12 Depth (cm)
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