Table 1 Scores and failure rates for lesion visibility and image quality with different acquisition parameters
Acquisition time (min) | Energy window width (%) | Matrix size | N | Lesion visibility score, mean (SD) | Overall image quality score, mean (SD) | Lesion visibility failure rate | Overall image quality failure rate |
|---|---|---|---|---|---|---|---|
50 | 15 | 128 × 128 | 45 | 3.8 (0.8) | 3.6 (0.9) | 4% | 11% |
50 | 10 | 128 × 128 | 45 | 3.8 (0.9) | 3.5 (1.0) | 4% | 16% |
50 | 8 | 128 × 128 | 45 | 3.7 (1.0) | 3.4 (1.1) | 11% | 27% |
50 | 6 | 128 × 128 | 45 | 3.6 (0.9) | 3.1 (1.0)a | 9% | 31% a |
50 | 4 | 128 × 128 | 45 | 3.5 (0.9)a | 2.7 (1.1)a | 7% | 49% a |
50 | 15 | 256 × 256 | 45 | 3.7 (0.9) | 3.3 (1.0)a | 7% | 22% |
50 | 15 | 128 × 128 | 90 | 4.2 (0.8) | 3.8 (1.0) | 0% | 13% |
38 | 15 | 128 × 128 | 90 | 3.8 (0.8)b | 3.4 (1.0)b | 2% | 19% |
32 | 15 | 128 × 128 | 90 | 3.4 (0.9)b | 2.9 (1.0)b | 11%b | 37%b |
26 | 15 | 128 × 128 | 90 | 3.0 (1.0)b | 2.2 (1.0)b | 32%b | 67%b |
20 | 15 | 128 × 128 | 90 | 2.3 (1.0)b | 1.4 (0.6)b | 58%b | 92%b |