145 / 1840
Seeds with
131
Cs Radioactive Isotope
•
Shorter T
1/2
compared to
125
I and
103
Pd
9.689d
vs.
59.49d and 16.991d
•
Higher Energy
30keV
vs
. 28keV and 21keV
Biological
Effectiveness
Dose
Homogeneity
•
Apparent Activity Conversion Factor
0.638 U.mCi
-1
versus
1.27 U.mCi
-1
for
125
I and 1.29 U.mCi
-1
for
103
Pd