Table 1.
Characteristics of 177Lu phantoms acquired on SPECT/CT camera to check for CF stability over time and range of activities
| Phantom type | Bottle | NEMA | ||
|---|---|---|---|---|
| Phantom preparation date | Mar 2014 | Dec 2014 | Oct 2015 | Mar 2016 |
| Activity at first acquisition [MBq] | 600 | 530 | 330 | 1926 |
| Activity at last acquisition [MBq] | 17 | 2 | 0.6 | 37 |
| Activity concentration at first acquisition [kBq/ml] | 933 | 815 | 526 | 174 |
| Activity concentration at last acquisition [kBq/ml] | 27 | 3 | 1 | 3 |
| Delay between first and last acquisition [days] | 34 | 55 | 60 | 38 |