Acquisition Parameters
| Parameter | Characteristics | Standard/preferred/optional |
|---|---|---|
| Camera type | Large field of view, dual head | Preferred |
| Large field of view, single head | Standard | |
| Energy peak | 172 and 247 keV | Standard |
| Energy window | 20% | Standard |
| Collimator | Medium energy | Standard |
| Patient position | Standing or supine | Standard |
| Camera position | Total abdomen from gastric fundus to pelvis | Standard |
| Injection-to-imaging time | Immediately on meal completion | Standard |
| Acquisition type | Planar | Standard |
| Views | Anterior and posterior | Standard |
| Initial (0 h) and 1, 2, 3, 4, 5, and 6 h | ||
| Additional views | Anterior and posterior | Not applicable |
| 24, 48, and 72 h | ||
| Matrix | 128 × 128 | Standard |
| Number of views | 2 views at each time point | Standard |
| Time per view | 60 s | Standard |
| Additional images: time per view | 4 min | Standard |