Protocols Suggested by Various Authors for Performing Daily Quality Control for Gamma-Camera Systems
| Parameter | Ref. 1 | Ref. 2 | Ref. 3 | Ref. 4 | Ref. 5 | Ref. 6 |
|---|---|---|---|---|---|---|
| Source activity (mCi) | 0.8–1.0 mCi | 0.1–0.2 mCi | ||||
| No. of counts required for the flood image (for large FOV cameras) | 2 × 106 | 2 × 106 | 3 × 106 | =10,000 cts in the central pixel of the image | 15 × 106 | 4500 cts/cm2 |
| Counting rate (cps) | <20,000 | 20,000 and 70,000 | <10,000 | <20,000 | 20,000–50,000 | 10,000–20,000 |
| Source-to-camera distance | 5 times UFOV | 5 times UFOV | 5 times UFOV | >5 times UFOV | 8 ft | >5 times UFOV |
| Image matrix size | 64 × 64 × 16 | 64 × 64 × 16 | 64 × 64 × 16 | Matrix which produces pixel size with linear dimension of 6.4 mm ± 30% | 512 × 512 × 16 | 256 × 256 |
| Source volume (mL) | — | — | <0.1 mL | — | — | 0.5 mL |
| Acceptable uniformity (%) for SPECT studies | — | <2% | <1% | — | <4.5% for UFOV; <2.5% for CFOV | <5% Standard; <3% Preferred |