Fig 5. A 61-year-old female patient with left side weakness (enrollment number 10 in Table 4).

A, 3D TOF-MRA shows a faint flow signal intensity along the course of the right ICA (white arrows). Both readers suspected high-grade stenosis in the petrocavernous segment of the ICA.

B, Lateral view, an early phase of DSA, reveals a severe stenosis of the proximal ICA bulb portion (black arrow) with early filling of the external carotid artery.

C, Late-phase DSA shows slow filling and decreased diameter of the petrocavernous segment, compatible with near occlusion of the ICA. Supraclinoidal segment of the distal ICA is filling from the ipsilateral posterior communicating artery (not presented).