Imaging for early stage breast cancer

Dose dependence on distance in brachytherapy

Correction for absorption and scattering in water

1,4

1,2

Ir-192

1

0,8

Ra-226

0,6

0,4 Relative dose

I-125

0,2

Pd-103

0

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

2 x 1

Distance (cm)

D 

inverse square law inhomogeneous dose distribution