Positron Emitters - Panasonic PT-DZ12000U Operating Instructions Manual

Positron Emitters Beta+ Energy and % Abundance
Half-life
C-11 20.3 m
N-13 9.97 m
O-15 122 s
F-18 1.83 h
Na-22 2.605 y
Al-26 7.3E5 y
V-48 15.98 d
Mn-52 5.591 d
Co-56 77.3 d
Ni-57 35.6 h
Co-58 70.88 d
Cu-62 9.74 m
Zn-65 243.8 d
Ga-68 67.7 m
As-74 17.8 d
Rb-82 1.26 m
Several of the positron emitters are useful in PET studies.
That usefulness is somewhat offset by the cost of producing
the radionuclides and the added complexity of radiation
protection. For all of the positron emitters the energy of the
Beta+ must be considered. Refer to the table of Beta Dose
Rates for estimates of beta+ radiation exposure. Also,
consider the annihilation photons when the positron comes
into contact with a beta-, annihilating their masses and
producing two 511 KeV photons. These photons present an
external radiation hazard. For the patient undergoing a PET
scan the combination of the positron energy and the photon
energy must be considered.
MeV (%)
0.960 (99.8%)
1.199 (99.8%)
1.732 (99.9%)
0.634 (96.7%)
0.546 (89.8%)
3.210 (100%)
0.697 (50.1%)
2.633 (94.9%)
1.458 (19.0%)
0.737 (7.0%), 0.865 (35.3%)
0.475 (14.9%)
2.926 (97.2%)
0.330 (1.4%)
0.822 (1.2%), 1.899 (89.1%)
0.945 (26.1%), 1.540 (3.0%)
2.601 (13.1%), 3.378 (81.8%)
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