Table 1.
Decay properties and production methods for selected radiometals used in PET and SPECT imaging.
| Radiometal | Half-life | Mode of decay (%) | Production mode | Application |
|---|---|---|---|---|
| 99mTc | 6.0 h | ITa (100) | 99Mo/99mTc generator | SPECT |
| 111In | 2.83 d | ECb (100) | 111Cd(p,n)111In | SPECT |
| 67Ga | 3.27 d | EC (100) | 68Zn(p,2n)67Ga | SPECT |
| 68Ga | 68 min | β+c (90) | 68Ge/68Ga generator | PET |
| 89Zr | 78.4 h | EC (77) β+ (23) | 89Y(p,n)89Zr | PET |
| 64Cu | 12.7 h |
β+ (18) EC (43) β−d (39) |
64Ni(p,n)64Cu | PET |
a
IT = isomeric transition.
b
EC = electron capture.
c
β+ = positron emission.
d
β− = beta emission.