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Table 5: 
Findings of unenhanced and contrast-enhanced 3D TOF MRA compared with DSA
MRA FindingDSA Finding
Residual NeckComplete Occlusion
Unenhanced MRA
    Residual neck244
    Complete occlusion346
    Percentage88.9 (70.1–97.6)92 (80.8–97.7)
Contrast-enhanced MRA
    Residual neck305
    Complete occlusion472
    Percentage88.2 (72.6–96.7)93.5 (85.5–97.7)
  • Note:—TOF indicates time of flight; MRA, magnetic resonance angiography; DSA, digital subtraction angiography. Percentages represent sensitivity (left column) and specificity (right column); figures in parentheses are 95% confidence intervals.