Differences Between Advance and Discovery RX PET Scanners
| Parameter | Advance | Discovery RX |
|---|---|---|
| Detector material | Bismuth germanate | Lutetium yttrium orthosilicate |
| Detector size (mm) | ||
| Tangential | 4.0 | 4.2 |
| Axial | 8.1 | 6.3 |
| Detector thickness (mm) | 30 | 30 |
| Detectors per block | 6 (tangential) × 6 (axial) | 9 (tangential) × 6 (axial) |
| Blocks (axial direction) | 3 | 4 |
| Detector rings (axial direction) | 18 | 24 |
| Image slices | 35 | 47 |
| Slice thickness (mm) | 4.25 | 3.27 |
| Crystals per ring | 672 | 630 |
| Detectors in whole gantry | 12,096 | 15,120 |
| Septa (mm) | ||
| Length | 120 | 54 |
| Thickness | 1 | 0.8 |
| Discriminator (keV) | ||
| Lower level | 300 | 425 |
| Upper level | 650 | 650 |
| Coincidence timing window (ns) | 12.5 | 6.5 |
| Attenuation correction | 68Ge pin source | 64-slice CT |
| Randoms correction | Delayed channel | Singles |