Table 2.
Validation of aortic diameter measurements
| Standardized anatomic landmarks | Manual diameter from 3D CE-MRA (mm) | Centreline diameter from 3D CE-MRA (mm) | Centreline diameter from 3D PC-MRA (mm) |
|---|---|---|---|
| Left ventricle outflow tract | 24 ± 2 | 26 ± 5 | 28 ± 2 |
| Aortic sinus | 32 ± 3 | 32 ± 5 | 28 ± 3† |
| Sino-tubular junction | 29 ± 3 | 30 ± 5 | 30 ± 4 |
| Mid-ascending aorta | 30 ± 4 | 30 ± 5 | 32 ± 5 |
| Brachiocephalic trunk | 28 ± 4 | 28 ± 4 | 29 ± 4 |
| Left subclavian artery | 24 ± 4 | 25 ± 5 | 23 ± 4 |
| Descending aorta | 22 ± 4 | 22 ± 4 | 21 ± 3 |
All continuous data are presented as mean ± standard deviation.
†P < 0.05, P-value resulted from independent-sample t-test comparing centreline diameter from 3D PC-MRA vs. manual/centreline diameter from 3D CE-MRA diameter.