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

RadioisotopeT1/2Decay ModeDecay Summary
32P14.29 daysβ−Eavg = 694 keV, Emax = 1710 keV, (Rcsdamax)bone = 4.75 mm
166Ho26.8 hoursβ−Eavg = 666 keV, Emax = 1854 keV, (Rcsdamax)bone = 5.20 mm
90Yb64.1 hoursβ−Eavg = 934 keV, Emax = 2284 keV, (Rcsdamax)bone = 6.51 mm
125I59.3 daysεEavg = 28 keV, Yγ = 159.6%
18F110 moβ+Eavg = 633.5 keV, Emax = 249.8 keV, (Rcsdamax)bone = 1.0 mm; produces 511 keV annihilation photons, Yγ = 96.73%
99mTc6.01 hoursITEavg = 131 keV, Yγ = 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; T1/2, half-life; IT, mid energy photon; Eavg, average energy; Emax, max energy; (Rcsdamax)bone, continuous-slowing-down-approximation of maximum range in bone; Yγ, gamma photon yield.