Table 4.
Comparison of MRAs/CTA and DSA in measuring the degree of stenosis and lesion length.
| DSA | PETRA-MRA | TOF-MRA | CTA | |
|---|---|---|---|---|
| Stenosis (100%) | ||||
| Reader 1 | 54.0 ± 18.6 | 55.3 ± 17.7 | 63.0 ± 15.8 | 61.0 ± 18.6 |
| Reader 2 | 54.0 ± 19.1 | 57.0 ± 17.2 | 59.8 ± 17.5 | 61.3 ± 18.3 |
| CV (%) | 8.4 | 10.9 | 14.1 | 10.8 |
| Bias | −0.02 | 1.7 | −3.2 | 0.3 |
| LOA | (−8.9, 8.8) | (−10.3, 13.6) | (−20.2, 13.7) | (−12.6, 13.2) |
| ICC | 0.97 | 0.94 | 0.86 | 0.94 |
| Lesion length (mm) | ||||
| Reader 1 | 3.12 (1.84, 4.30) | 3.21 (2.04, 4.27) | 3.30 (2.07, 4.20) | 2.68 (1.52, 4.64) |
| Reader 2 | 3.12 (1.73, 4.18) | 3.23 (1.89, 4.21) | 3.30 (1.97, 4.40) | 2.60 (1.51, 4.66) |
| ICC | 0.99 | 0.99 | 0.99 | 0.97 |
CTA, computed tomography angiography; CV, coefficient of variation; DSA, digital subtraction angiography; ICC, intraclass coefficient; LOA, limit of the agreement; MRA, magnetic resonance angiography; PETRA, pointwise encoding time reduction; TOF, time of flight.