CT and PET Parameters in Current PET/CT Designs
| CT parameters | PET parameters | ||||
|---|---|---|---|---|---|
| Detectors | Ceramic | Scintillator | BGO; GSO; LSO | ||
| Slices | 1, 2, 4, 8, 16 | Detector size | 4×4 mm; 6×6 mm | ||
| Rotation speed | 0.4–2.0 s | Axial FOV | 15–18 cm | ||
| Tube current | 80–280 mA | Septa | 2D/3D; 3D only | ||
| Heat capacity | 3.5–6.5 MHU | Attenuation | rod; point; CT only | ||
| Trans. FOV | 45–50 cm | Trans. FOV | 55–60 cm | ||
| Time/100 cm | 13–90 s | Time/bed | 1–5 min | ||
| Slice width | 0.6–10 mm | Resolution | 4–6 mm | ||
| Patient port | 70 cm | Patient port | 60–70 cm | ||
BGO = bismuth germanate; GSO = gadolinium oxyorthosilicate; LSO = lutetium oxyorthosilicate; FOV = field of view; MHU = mega Hounsfield units.