Table 2:

Comparison between 3D TOF-MRA and DSA

3D TOF-MRADSA
Low-GradeHigh-GradeOcclusionTotal
Distal internal carotid artery(n = 50)(n = 11)(n = 7)(n = 68)
    Observer 1
        Low-grade471048
        High-grade38011
        Occlusion0279
    Observer 2
        Low-grade471048
        High-grade39012
        Occlusion0178
Middle cerebral artery(n = 51)(n = 11)(n = 6)(n = 68)
    Observer 1
        Low-grade482050
        High-grade39012
        Occlusion0066
    Observer 2
        Low-grade481049
        High-grade39012
        Occlusion0167
Vertebrobasilar artery(n = 19)(n = 5)(n = 0)(n = 24)
    Observer 1
        Low-grade181019
        High-grade1405
        Occlusion0000
    Observer 2
        Low-grade190019
        High-grade0505
        Occlusion0000
All arteries(n = 120)(n = 27)(n = 13)(n = 160)
    Observer 1
        Low-grade11340117
        High-grade721028
        Occlusion021315
    Observer 2
        Low-grade11420116
        High-grade623029
        Occlusion021315

  • Note:—Low-grade, normal or <50% diameter stenosis; high-grade, 50%–99% diameter stenosis; DSA, digital subtraction angiography; TOF-MRA, time-of-flight MR angiography.