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67.0
%3DΔ
0 2
mm 3dΔ
2 2
)2 'x(Γ    














Local dose difference at x = 0: 28%
0
50
100
-10.0 -5.0 0.0 5.0 10.0
m c
Only small shift between Dm and Dc results in perfect agreement in dose
x = 0 passed -test 
-comparison in penumbra region