Table 5.
Technical accuracy. Median luminal diameters, absolute deltas (Δ) in millimeter, and relative deltas in percent for aorta, main branch, and smallest procedure-relevant artery including the interquartile range (IQR). No significant differences were found between the printed models and their original CT (each p > 0.05) using Friedman’s test (1) and Dunn’s multiple comparison test for the diameters, as well as Wilcoxon matched-pair signed rank test for the deltas
| Aorta | Main branch | Smallest artery | ||||
|---|---|---|---|---|---|---|
| Diameter | Median diameter | p | Median diameter | p | Median diameter | p |
| Original CT | 19.5 (± 6.3) mm | 0.58 1 | 5.9 (± 2.4) mm | 0.21 1 | 3.2 (± 1.8) mm | 0.30 1 |
| Clear resin (V4) | 18.9 (± 5.3) mm | 0.62 | 6.1 (± 2.6) mm | > 0.99 | 3.0 (± 1.8) mm | 0.50 |
| Flexible resin (80A) | 19.0 (± 5.5) mm | 0.94 | 5.9 (± 2.5) mm | 0.22 | 3.0 (± 1.6) mm | 0.30 |
| Absolute delta Δ (mm) | Median delta (mm) | p | Median delta (mm) | p | Median delta (mm) | p |
| CT vs. clear resin | 0.48 (± 0.55) mm | 0.18 | 0.40 (± 0.36) mm | 0.43 | 0.23 (± 0.25) mm | 0.54 |
| CT vs. flexible resin | 0.67 (± 0.54) mm | 0.30 (± 0.36) mm | 0.18 (± 0.21) mm | |||
| Relative delta Δ (%) | Median error (%) | p | Median error (%) | p | Median error (%) | p |
| CT vs. clear resin | 2.66 (± 2.70)% | 0.15 | 6.31 (± 5.31)% | 0.65 | 6.52 (± 10.28)% | 0.56 |
| CT vs. flexible resin | 3.63 (± 3.17)% | 6.27 (± 7.93)% | 7.21 (± 8.46)% | |||