TABLE 1

Radionuclides Used for PRRT in Patients

Isotope	Main decay mode	Half-life	Therapeutic particle and energy	Tissue penetration depth	Status
¹⁷⁷Lu	β⁻, γ	6.7 d	β⁻, E_(mean) = 0.149 MeV, E_(max) = 0.497 MeV	Mean, 0.5 mm; maximum, 2 mm	MA
⁹⁰Y	β⁻	2.7 d	β⁻, E_(mean) = 0.937 MeV, E_(max) = 2.284 MeV	Mean, 2.5 mm; maximum, 11 mm	MA
¹¹¹In	EC	2.8 d	Auger e⁻, 0.13–25.6 keV	0.25 nm–13.6 μm	MA
²¹³Bi	α	45.6 min	α, 5.9/8.4 MeV	85 μm	CS
²²⁵Ac	α	9.9 d	α, 5.8–8.4 MeV	47–85 μm	CS
²¹²Pb	α, β⁻, EC	10.6 h	α, 6.2–8.9 Mev	50–100 μm	CS