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Relative sensitivity for selected scanner axial lengths as calculated for three different imaging setups. The phantoms are 200 cm long cylinders.
| Scanner AFOV (cm) | 20 | 70 | 100 | 140 | 200 |
|---|---|---|---|---|---|
| Point source in air placed at the center of AFOV (A) | 1 | 2.8 | 3.3 | 3.7 | 4.0 |
| Point source placed at the center of AFOV in a 20 cm diam. phantom (B) | 1 | 2.4 | 2.7 | 2.8 | 2.8 |
| Uniform source distribution in a 20 cm diameter phantom (C) | 1 | 10 | 18 | 29 | 46 |
| Uniform source distribution in a 35 cm diameter phantom (C) | 1 | 14 | 24 | 38 | 58 |
