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Properties
90
Yttrium
131
Iodine
Half-life
64 hours
192 hours
Energy emitter
Beta
(2.3 MeV)
Gamma (0.36 MeV)
Beta (0.6 MeV)
Path length
χ
90
5 mm
χ
90
0.8 mm
Urinary
excretion
Minimal
7% in 7 days
Extensive/variable
46 - 90% in 2 days
Dosing
Based on
weight and
platelet count
Clearance based
dosing using whole
body dosimetry
Administration
Outpatient
Inpatient or
restrictions to
protect family/public
131
I
Choice of radioisotope