99mTc-HMDP Cardiac Amyloidosis Protocol (1)
| Protocol | Parameter | Recommendation |
|---|---|---|
| Prescan | ||
| Preparation | No specific preparation; no fasting required | |
| Scan | Rest scan | Standard |
| Dose | 370–740 MBq (10–20 mCi) 99mTc-HMDP intravenously | Standard |
| Time from injection to acquisition | 2 or 3 h | Standard |
| General imaging parameters | ||
| Field of view | Heart or chest | Standard |
| Whole-body | Optional | |
| Image type | Planar | Standard |
| SPECT if planar is positive | Required | |
| Position | Supine | Standard |
| Upright | Optional | |
| Energy window | 140 keV, 15%–20% | Standard |
| Collimators | Low-energy, high-resolution | Standard |
| Matrix | Planar: 256 × 256 (minimum, 64 × 64) | Standard |
| SPECT: 128 × 128 (minimum, 64 × 64) | Standard | |
| Pixel size | 3.5–6.5 mm | Standard |
| Planar parameters | ||
| Views | Chest: anterior and lateral | Standard |
| Whole-body: from head to toe | Optional | |
| Detector configuration | 90° | Recommended |
| Image duration (count-based) | Planar: 750,000 | Standard |
| Whole-body: 20 cm/min | Optional | |
| Magnification | 1.46 | Standard |
| SPECT parameters | ||
| Angular range | 180° | Standard |
| 360° | Optional | |
| Detector configuration | 90° | Standard |
| 180° | Optional | |
| Electrocardiographic gating | Off; nongated imaging | Standard |
| Number of views/detector | 40/32 | Standard |
| Time per stop | 20 s/25 s | Standard |
| Magnification | 1.46 (180° angular range) or 1.0 (360° angular range) | Recommended |