Table 3 Descriptive analysis of the studied cases according to mean objective image quality and subjective image quality
|  | Weight ≤ 80 kg (n = 10) | Weight > 80 kg (n = 11) | P value for A1 vs. B1 | P value for A2 vs. B2 | ||||
|---|---|---|---|---|---|---|---|---|
Standard dose Protocol A1 | 80 kVp Protocol B1 | Standard dose Protocol A2 | 110 kVp Protocol B2 | |||||
Objective image quality | Mean SNR | Aorta | ||||||
Min–max. | 2.38–7.30 | 1.45–5.66 | 1.78–8.71 | 2.14–9.39 | (0.007*) | (0.082) | ||
Mean ± SD | 5.10 ± 1.64 | 3.48 ± 1.56 | 5.24 ± 2.17 | 5.14 ± 2.24 | ||||
Psoas Ms | ||||||||
Min.–max. | 2.07–4.56 | 1.51–3.02 | 1.21–9.71 | 1.39–4.08 | (0.006*) | (0.82) | ||
Mean ± SD | 3.72 ± 0.84 | 2.23 ± 0.49 | 3.75 ± 2.32 | 2.94 ± 0.86 | ||||
Mean CNR | Aorta | |||||||
Min.–max. | 8.42–22.72 | 6.64–18.63 | 5.64–20.29 | 9.1–29.35 | (0.085) | (0.29) | ||
Mean ± SD | 13.94 ± 4.55 | 10.24 ± 3.75 | 13.39 ± 4.09 | 15.50 ± 6.9 | ||||
Psoas Ms | ||||||||
Min.–max. | 7.15–17.96 | 5.47–16.39 | 4.98–21.63 | 7.88–23.42 | (0.42) | (0.34) | ||
Mean ± SD | 12.03 ± 3.55 | 8.25 ± 2.16 | 12.02 ± 4.53 | 13.04 ± 5.07 | ||||
Subjective image quality | Image noise | 3(1–3) | 2(1–3) | 3(2–3) | 3(2–3) | (0.001*) | 1 | |
Image quality | 3(1–3) | 2(1–3) | 3(2–3) | 3(2–3) | (0.001*) | (0.546) | ||