CPB Ljubljana 2018 course book

Permanent prostate implants choice of isotopes

• Low energy photons • High nominal specific activity

I125

Pd103

Cs131

Half life (days)

59.4

17.0

9.7

Mean photon energy (keV)

28.4

20.7

30.3

HVL (mm)

0.025

0.0085

0.022

Nominal specific activity (x10 5 TBqkg -1 )

6.5

27

38