Table 3 Radionuclides used in RIT
Isotope Half-life (hrs) Radiation Max. energy (keV) Max. range (mm)
Iodine-131
193
β or γ
610
2.0
Yttrium-90
64
β
2,280
12.0
Rhenium-186
91
β
1,080
5.0
Rhenium-188
17
β or γ
2,120
11.0
Copper-67
62
β
577
1.8
Bismuth-213
77
α
>6,000
< 0.1
Astatine-211
7
α
7,450
0.1

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