TABLE 1

Physical Characteristics of β-Emitters Used Most Often in Radioimmunotherapy

RadionuclideHalf-life (d)Maximum β-energy (MeV)Maximum penetration depth (mm)γ-Emission, in keV (%)
131I8.00.6063.0364 (82), 637 (6.5)
90Y2.72.2812.0None
186Re3.81.085.4137 (9.5)
177Lu6.70.4972.5208 (11), 113 (7)