Evaluation of parent artery patency (n = 56)
| NC-MRA | CE-MRA | DSA | |
|---|---|---|---|
| Three-grade scale | |||
| Patent | 36 (64.3%) | 24 (42.9%) | 42 (75.0%) |
| Stenosis | 19 (33.9%) | 31 (55.4%) | 13 (23.2%) |
| Occlusion | 1 (1.8%) | 1 (1.8%) | 1 (1.8%) |
| Simplified 2-grade scale | |||
| Patent | 36 (64.3%) | 24 (42.9%) | 42 (75.0%) |
| Stenosis or occlusion | 20 (35.7%) | 32 (57.1%) | 14 (25.0%) |