CT Image Noise and Subjective Image Quality Score
| Quality index | FBP CT | ASiR CT | P (noninferiority) |
| Likert no. 1 | 3.8 ± 0.5 | 3.6 ± 0.5 | <0.0001 |
| Likert no. 2 | 4.0 ± 0.1 | 4.0 ± 0.2 | <0.0001 |
| SNR | 0.93 ± 0.16 | 1.07 ± 0.17 | <0.0001 |
Likert = 5-point scale image quality score.
Data are mean ± SD.