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. Author manuscript; available in PMC: 2015 Feb 13.
Published in final edited form as: Prog Mol Biol Transl Sci. 2010;95:237–298. doi: 10.1016/B978-0-12-385071-3.00009-5

Table 1. Commonly used PET and SPECT Radioisotopes.

Isotope Imaging Mode Production Method Half-Life Decay Mode(s)
11C PET Cyclotron 20.4 min β+ (99+%)
13N PET Cyclotron 10 min β+ (100%)
15O PET Cyclotron 2.03 min β+ (99.9%)
18F PET Cyclotron 110 min β+ (97%)
EC (3%)
124I PET Accelerator 4.2 days EC (74.4%)
β+ (25.6%)
68Ga PET Generator 68.3 min β+ (90%)
EC (10%)
62Cu PET Generator 9.73 min β+ (98%)
EC (2%)
64Cu PET Reactor 12.7 hours β+
EC
99mTc SPECT Generator 6.02 hours IT
111In Gamma Scintigraphy Accelerator 2.8 days EC
x-ray
123I SPECT Accelerator 13.3 hours EC

β+ = positron emission; EC = electron capture; IT = Isomeric transition.