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Background activity concentration (Ac,bg), total activity deviation (ΔAtot), calibration factor (Bg. cal), and coefficient of variation (COV) for 4 SPECT acquisitions of a cylindrical homogeneous phantom.
| Homogeneous scan number |
A c,bg (kBq/mL) | ΔAtot (%) | Bg. cal | COV% |
|---|---|---|---|---|
| Scan 1 | 22 | 3.9 | 1.05 | 13 |
| Scan 2 | 20 | 4.1 | 1.04 | 12 |
| Scan 3 | 18 | 3.5 | 1.04 | 12 |
| Scan 4 | 2 | 8.6 | 1.09 | 38 |
