Table 2 Contrast, noise, and CNR of images with different acquisition parameters
Acquisition time (min) | Energy window width (%) | Matrix size | Contrast, median (IQR) | Noise, median (IQR) | CNR, median (IQR) |
|---|---|---|---|---|---|
50 | 15 | 128 × 128 | 2.0 (1.4–3.2) | 0.09 (0.08–0.11) | 22.2 (15.7–31.1) |
50 | 10 | 128 × 128 | 2.0 (1.4–3.4) | 0.12 (0.09–0.16) | 17.5 (12.0–24.3) |
50 | 8 | 128 × 128 | 2.1 (1.4–3.5) | 0.13 (0.10–0.18) | 17.4 (12.6–25.8) |
50 | 6 | 128 × 128 | 2.2 (1.4–3.5) | 0.15 (0.12–0.18) | 14.4 (10.4–21.3) |
50 | 4 | 128 × 128 | 2.3 (1.4–3.6) | 0.18 (0.15–0.22) | 12.8 (8.2–20.1) |
50 | 15 | 256 × 256 | 2.1 (1.4–3.2) | 0.12 (0.10–0.15) | 17.1 (12.1–24.5) |
41 | 15 | 128 × 128 | 2.0 (1.4–3.3) | 0.12 (0.10–0.16) | 18.0 (12.0–25.8) |
32 | 15 | 128 × 128 | 2.1 (1.4–3.3) | 0.15 (0.11–0.19) | 14.0 (9.4–20.3) |
26 | 15 | 128 × 128 | 2.1 (1.4–3.3) | 0.17 (0.14–0.23) | 12.7 (8.3–19.7) |
20 | 15 | 128 × 128 | 2.2 (1.5–3.6) | 0.22 (0.18–0.29) | 10.8 (7.1–15.3) |