Table 3. Results of qualitative scores and quantitative measurements.
| 50% ASIR-V | 100% ASIR-V | DLIR-H | Statistical value | P value | |
|---|---|---|---|---|---|
| Subjective evaluation# | |||||
| Overall noise | 2.27±0.55 | 3.36±0.58 | 4.05±0.21 | 76.91 | <0.001 |
| Vascular margin | 3.77±0.61* | 2.86±0.56 | 4.05±0.58* | 24.79 | <0.001 |
| Vascular contrast | 3.14±0.64 | 4.00±0.62* | 4.14±0.64* | 16.19 | <0.05 |
| Objective evaluation& | |||||
| Aorta CT | 412.50±118.05* | 413.00±118.00* | 413.41±118.18* | 0.00 | 1.00 |
| Aorta SD | 29.45±7.59 | 20.45±6.93* | 19.24±5.77* | 14.78 | <0.001 |
| Aorta SNR | 14.64±4.66 | 21.53±6.8* | 22.58±7.04* | 10.45 | <0.001 |
| Aorta CNR | 13.73±4.00 | 21.6±5.76* | 20.68±6.00* | 14.35 | <0.001 |
SD, image noise value. *, without in-group statistical difference; #, subjective scores were compared with Friedman’s test; &, objective scores were compared with one-way ANOVA. ASIR-V, adaptive statistical iterative reconstruction-V; DLIR-H, high-setting deep learning image reconstruction; SNR, signal-to-noise ratio; CNR, contrast-to-noise ratio.