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Dose dependence on distance in brachytherapy

2

x

1 D

≈

0

0,2

0,4

0,6

0,8

1

1,2

1,4

0 1 2 3 4 5 6 7 8 9 10 11

Relative dose

Distance (cm)

I-125

Ir-192

Ra-226

Pd-103

Correction for absorption and scattering in water

inverse square law inhomogeneous dose distribution