Summary of the radiologic characteristics for the isotopes studied in Hirsch et al³

Radioisotope	T_1/2	Decay Mode	Decay Summary
³²P	14.29 days	β−	E_avg = 694 keV, E_max = 1710 keV, (R_csda^max)^bone = 4.75 mm
¹⁶⁶Ho	26.8 hours	β−	E_avg = 666 keV, E_max = 1854 keV, (R_csda^max)^bone = 5.20 mm
⁹⁰Yb	64.1 hours	β−	E_avg = 934 keV, E_max = 2284 keV, (R_csda^max)^bone = 6.51 mm
¹²⁵I	59.3 days	ε	E_avg = 28 keV, Y_γ = 159.6%
¹⁸F	110 mo	β+	E_avg = 633.5 keV, E_max = 249.8 keV, (R_csda^max)^bone = 1.0 mm; produces 511 keV annihilation photons, Y_γ = 96.73%
^99mTc	6.01 hours	IT	E_avg = 131 keV, Y_γ = 96.5%

Note:—³²P indicates phosphorus-32; ¹⁶⁶Ho, holmium-166; ⁹⁰Yb, yttrium-90; ¹²⁵I, iodine 125; ¹⁸F, fluorine-18; ^99mTc, technetium-Tc99m; ε, low energy photon; T_1/2, half-life; IT, mid energy photon; E_avg, average energy; E_max, max energy; (R_csda^max)^bone, continuous-slowing-down-approximation of maximum range in bone; Y_γ, gamma photon yield.