Table 1.
Summary of the key characteristics for each of the camera systems, which were taken into account for the quantitative SPECT reconstruction, as well as the planar image quantification, used in the protocol. Medium-energy general purpose collimators were employed for all camera systems, and an energy window centred over the 208-keV photo peak
| Camera | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| Model | GE Discovery VG | GE Discovery NM/CT 670 | GE Millenium VG | GE Infinia | Philips IRIX | GE Discovery NM/CT 670 | GE Discovery NM/CT 670 Pro | GE Discovery NM/CT 670 Pro |
| Crystal thickness (inches) | 8/8 | 5/8 | 5/8 | 3/8 | 6/8 | 5/8 | 5/8 | 5/8 |
| System sensitivity in 208 keV window (cps/MBq) | 9.12 | 7.90 | 7.35 | 6.58 | 12.92 | 8.72 | 7.00 | 7.80 |
| Energy window centred at 208 keV | 20% | 15% | 20% | 20% | 20% | 20% | 20% | 20% |