Acquisition Parameters for DaTscan SPECT
| Parameter | Standard recommendation |
| Camera type | Large–field-of-view multidetector |
| Energy peak | 159 keV |
| Energy window | 10% |
| Collimator | Low-energy high-resolution |
| Patient position | Supine with arms down; head in an off-table head holder |
| Camera position | Centered over the head |
| Injection-to-scan time | 3–6 h |
| Acquisition type | Step-and-shoot or continuous |
| Orbit | 360° |
| Orbit type | Circular, with the smallest possible radius of rotation (11–15 cm) |
| Matrix | 128 × 128 |
| Number of projections | 120 (3°/projection) |
| Time per projection | 30–40 s |
In SPECT/CT protocols, the manufacturer’s recommendations are followed for the CT acquisition parameters.