Modern Bt Techniques - Florence 2016

Seeds with 131 Cs Radioactive Isotope • Biological Effectiveness

1,0

0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9

Total Dose (100%)

125 I 103 Pd 131 Cs

• 145 Gy • 125 Gy • 115 Gy

0 20 40 60 80 100 120 140 160 180 200 220 0,0 0,1 Days after Implantation

Accumulated Dose as fraction of Total

• Initial Dose Rate (at the prostate surface) 30 cGy.h -1 versus 7 cGy.h -1 for 125 I and 20 cGy.h -1 for 103 Pd