Table 4.
Volume measurement of each plaque component and vessel wall at scan–rescan sessions
| Plaque component | Volume measured with manual segmentation (mean ± SD) | Volume measured with automatic segmentation (mean ± SD) | ||||
|---|---|---|---|---|---|---|
| First scan (1st) | Second scan (2nd) | Difference (1st–2nd) | First scan (1st) | Second scan (2nd) | Difference (1st–2nd) | |
| Fibrous tissue (mm3) | 562.2 ± 354.5 | 560.6 ± 351.2 | 1.7 ± 108.0 | 569.6 ± 263.3 | 551.4 ± 265.2 | 18.3 ± 100.8 |
| Lipid (mm3) | 44.1 ± 75.1 | 33.7 ± 8.9 | 10.4 ± 64.8 | 28.6 ± 64.1 | 30.7 ± 83.2 | −2.1 ± 26.1 |
| Calcification (mm3) | 82.9 ± 121.8 | 83.1 ± 145.2 | −0.2 ± 55.3 | 85.4 ± 189.6 | 78.8 ± 175.2 | 6.6 ± 65.7 |
| Loose matrix (mm3) | 80.5 ± 101.4 | 61.1 ± 90.4 | 19.4 ± 104.3 | 86.2 ± 132.2 | 83.4 ± 110.9 | 2.8 ± 61.1 |
| Vessel wall (mm3) | 779.7 ± 570.4 | 750.9 ± 521.5 | 28.8 ± 161.9 | |||
For each type of tissue, the mean volume was calculated by taking the average from all 23 patients, in whom the post-aligned scan and rescan data were used