Arterial Segment | TOF-MRA | CE-MRA | DSA | ||||||
---|---|---|---|---|---|---|---|---|---|
Stenosis Severity | Stenosis Severity | Stenosis Severity | |||||||
≤50% | >50, <99% | Occlusion | ≤50% | >50, <99% | Occlusion | ≤50% | >50, <99% | Occlusion | |
Common carotid artery | 3 | 2 | 3 | 5 | 1 | 0 | 3 | 0 | 0 |
Cervical ICA | 2 | 1 | 6 | 4 | 4 | 4 | 7 | 5 | 4 |
Pretrocavernous ICA | 2 | 3 | 4 | 1 | 1 | 1 | 0 | 2 | 1 |
Supraclinoid ICA | 3 | 4 | 6 | 1 | 5 | 3 | 1 | 1 | 3 |
MCA | 3 | 6 | 14 | 1 | 2 | 11 | 2 | 1 | 10 |
Anterior cerebral artery | 2 | 2 | 2 | 0 | 1 | 0 | 2 | 1 | 0 |
Cervical vertebral artery | 0 | 0 | 1 | 1 | 0 | 1 | 2 | 0 | 1 |
Intradural vertebral artery | 3 | 0 | 3 | 1 | 0 | 0 | 0 | 1 | 0 |
Basilar artery | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Posterior cerebral artery | 0 | 3 | 1 | 0 | 2 | 0 | 2 | 1 | 0 |
Total | 20 | 22 | 40 | 14 | 18 | 20 | 19 | 12 | 19 |