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Comparison of image quality and noise levels between the two groups (x̅±s)
| Group | n | Image quality (Score) | Vascular CT value (HU) | Image noise (HU) | SNR (HU) | CNR (HU) |
|---|---|---|---|---|---|---|
| Research group | 181 | 4.27 ± 0.64 | 380.54 ± 22.24 | 22.24 ± 2.52 | 17.32 ± 1.95 | 15.84 ± 1.75 |
| Control group | 161 | 4.10 ± 0.55 | 384.48 ± 23.42 | 21.96 ± 2.34 | 17.62 ± 1.84 | 16.13 ± 1.60 |
| t | 2.618 | 1.595 | 1.061 | 1.458 | 1.592 | |
| P | 0.009 | 0.112 | 0.290 | 0.146 | 0.112 |
Note: SNR: signal-to-noise ratio; CNR: contrast-to-noise ratio.
