Table 2.
Comparison of expert reader and AI measurements at each thoracic anatomical aortic level analysed on ECG-gated contrast imaging, assessed against absolute difference (mm), proportionate difference (%) and the average of each anatomical levels single measurer ICC with its associated rating.
| Anatomical location |
Absolute difference (mm; mean [± SD]) |
Proportionate difference (%; median [IQR]) | ICC (95% CI, p) | ICC rating |
|---|---|---|---|---|
| SoV | 2.6 [2.1] | 6 [3–11] | 0.78 (0.67–0.85, p<0.001) | Good |
| STJ | 1.9 [1.9] | 4 [3–8] | 0.83 (0.74–0.88, p<0.001) | Good |
| Mid Asc | 1.3 [1.3] | 3 [0–6] | 0.92 (0.89–0.94, p<0.001) | Excellent |
| Mid Arch | 1.7 [1.7] | 4 [3–8] | 0.76 (0.70–0.82, p<0.001) | Good |
| Isthmus | 1.7 [1.7] | 4 [3–8] | 0.81 (0.76-0.86, p<0.001) | Good |
| Mid Desc | 1.3 [1.4] | 4 [0–8] | 0.88 (0.78–0.92, p<0.001) | Good |
| Hiatus | 1.4 [1.6] | 4 [0–8] | 0.81 (0.76–0.86, p<0.001) | Good |
CI, confidence interval; ICC, intraclass correlation coefficient; IQR, interquartile range; SD, standard deviation; STJ, sinotubular junction; SoV, sinus of Valsalva.