Table 1.
Comparison of MRAs/CTA and DSA in measuring the degree of stenosis and lesion length.
| DSA | PETRA-MRA | TOF-MRA | CTA | |
|---|---|---|---|---|
| Stenosis (100%) | ||||
| Mean ± SD | 54.0 ± 18.6 | 55.3 ± 17.7 | 63.0 ± 15.8 | 61.0 ± 18.6 |
| CV (%) | Reference | 11.8 | 19.4 | 15.2 |
| P | Reference | 0.13 | < 0.01 | < 0.01 |
| Bias | Reference | −1.3 | −9.0 | −7.0 |
| LOA | Reference | (−14.0, 11.4) | (−31.3, 13.2) | (−24.1, 10.2) |
| r | Reference | 0.94 | 0.80 | 0.89 |
| ICC | Reference | 0.94 | 0.79 | 0.89 |
| Lesion length (mm) | ||||
| Median | 3.13 (2.12, 4.50)& | 3.31 (2.06, 4.27)& | 3.41 (2.25, 4.50)& | 3.05 (1.96, 5.34)& |
| P | Reference | 0.06 | 0.17 | 0.78 |
| r | Reference | 0.99 | 0.98 | 0.70 |
| ICC | Reference | 0.99 | 0.97 | 0.73 |
&
Interquartile range. 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; SD, standard deviation; TOF, time of flight.