Traditional PET Scanners Compared with Upright PET Scanners
| Scanner | General feature | Geometry | Motion-friendly | Spatial resolution | Sensitivity (%) | Axial coverage | Support mechanics |
| Whole-body PET | Standard of care | Horizontal, supine, or prone | No | 4–5 mm | 1 | Whole brain | Bed |
| Helmet PET | Wearable feasibility prototype | Upright | Yes | 2–4 mm | 0.5 | ∼5 cm | Passive vertical weight support |
| AM PET, generation 0 | Dissemination prototype | Upright | Yes | 2–5 mm | 3–5 | Whole brain | Passive weight support |
| AM PET, generation 1 | Dissemination prototype | Upright | Yes | 2–3 mm | 5–10 | Whole brain | Active weight support |
Reprinted with permission of (6).