Table 1.
Summary of Decay Properties, Radionuclide Production Methods, and Potential Medical Use of Selected Radioarsenic Isotopes
| isotope | half-life (h) | decay propertiesa | production method | medical use |
|---|---|---|---|---|
| 70As | 0.877 | 90% β+, 10% ec | Medical cyclotron | PET imaging |
| 71As | 65.30 | 28% β+, 72% ec | Medical cyclotron | PET imaging |
| 72As | 26.0 | 88% β+, 12% ec | Medical cyclotron, 72As/72Se generator | PET imaging |
| 74As | 426.5 | 29% β+, 36% ec, 34% β− | Medical cyclotron | PET imaging |
| 76As | 25.867 | 100% β− | Medical cyclotron | Radiotherapy |
| 77As | 38.79 | 100% β− | Medical cyclotron, neutron capture | Radiotherapy |
a
β+: positron emission, ec: electron capture, β−: electron emission.