Table 3.
Comparison of MRAs/CTA and DSA in severe stenosis, smaller artery stenosis, and anterior/posterior cerebral circulation stenosis.
| DSA | PETRA-MRA | TOF-MRA | CTA | |
|---|---|---|---|---|
| Severe stenosis | ||||
| Median (%) | 76.11 (73.60, 81.75)& | 77.05 (70.13, 81.75)& | 78.41 (74.74, 85.38)& | 82.24 (77.44, 88.30)& |
| P | Reference | 0.08 | 0.56 | < 0.01 |
| ICC | Reference | 0.78 | 0.30 | 0.57 |
| Smaller artery stenosis | ||||
| Mean ± SD (%) | 48.20 ± 16.06 | 50.87 ± 17.56 | 60.94 ±13.40 | 55.49 ± 18.21 |
| P | Reference | 0.07 | < 0.01 | 0.03 |
| ICC | Reference | 0.95 | 0.70 | 0.80 |
| Anterior cerebral circulation | ||||
| Median (%) | 54.17 (41.52, 73.36)& | 58.37 (42.08, 72.17)& | 65.79 (54.04, 77.72)& | 63.04 (49.93, 79.17)& |
| P | Reference | 0.60 | < 0.01 | < 0.01 |
| ICC | Reference | 0.93 | 0.78 | 0.88 |
| Posterior cerebral circulation | ||||
| Mean ± SD (%) | 45.30 ± 15.78 | 48.57 ± 16.29 | 54.97 ± 15.22 | 52.01 ± 18.51 |
| P | Reference | 0.02 | < 0.01 | < 0.01 |
| ICC | Reference | 0.94 | 0.71 | 0.91 |
&
Interquartile range. CTA, computed tomography angiography; DSA, digital subtraction angiography; MRA, magnetic resonance angiography; PETRA, pointwise encoding time reduction; TOF, time of flight.