Table 2.
The average, median and SD of the annulus angle difference, annulus to ostium distances, annulus center distance, sinotubular junction center distance, angle difference, and corresponding annulus radius for the accuracy of the proposed algorithm and interobserver variation
| Measurement error | Algorithm versus observer I | Algorithm versus observer II | Interobserver variation | |||
|---|---|---|---|---|---|---|
| Mean ± SD | Median | Mean ± SD | Median | Mean ± SD | Median | |
| Annulus to ostia distance (mm) | −0.13 ± 2.46 | 0.10 | −0.27 ± 2.63 | −0.08 | −0.14 ± 2.06 | −0.16 |
| Annulus radius (mm) | 0.24 ± 0.70 | 0.16 | 0.37 ± 0.82 | 0.46 | 0.61 ± 0.71 | 0.64 |
| Annulus center (mm) | 1.93 ± 0.90 | 1.81 | 2.12 ± 1.02 | 1.98 | 1.61 ± 0.90 | 1.25 |
| Annulus plane (°) | 6.86 ± 5.39 | 6.02 | 6.34 ± 4.00 | 5.14 | 4.69 ± 3.82 | 3.91 |
| Sinotubular junction center (mm) | 2.97 ± 2.87 | 1.86 | 3.06 ± 4.15 | 1.45 | 2.54 ± 4.02 | 1.35 |
| Sinotubular junction plane (°) | 13.7 ± 14.5 | 9.1 | 13.2 ± 22.3 | 7.5 | 11.1 ± 15.4 | 5.0 |