TABLE 1.
Fit Parameters for Time to Elute Certain Activity Levels as Function of Generator Age, Following Functional Form
| Fit (mCi) | y intercept (y0) (s) | Amplitude (A) (s) | Growth constant (t1) (d−1) | Band range (s) |
|---|---|---|---|---|
| 20 | 6.05 | 2.31 | 37.54 | ±1.05 |
| 30 | 6.25 | 5.21 | 32.60 | ±1.70 |
| 40 | 9.25 | 5.70 | 17.33 | ±5 |
| 45 | 2.93 | 13.12 | 20 | ±8 |
| Modified 45 | 16.22 | 3.15 | 10.96 | ±2.5 |
Additional fit was performed for largest eluted activity (1,665 MBq) to demonstrate that data could be more precisely fitted without 2 days’ worth of generator results.