Table 5:

Summary of undergraded arteries (n = 5)

Enrollment NumberLocationStenosis on MRA Observers 1/2 (%)Stenosis on DSA (%)Estimated Causes
33Left MCA, proximal M130/5760Observer error
36Left MCA, bifurcation area40/3957Observer error
3Left ICA, petrocavernous segment80/060Proximal occlusion with reconstructed distal ICA from ECA collaterals
28Right ICA, petrocavernous segment40/5751Borderline stenosis
40Right distal VA segment45/5873Observer error
  • Note:—MCA indicates middle cerebral artery; M1, horizontal segment of MCA; ICA, internal carotid artery; ECA; external carotid artery; VA, vertebral artery; MRA, 3D time-of-flight MR angiography; DSA, digital subtraction angiography.