Figure 2
From: Internal jugular venous abnormalities in transient monocular blindness
Quantitative grading of IJV compression/stenosis. Contrast-enhanced, axial T1-weighted images of quantitative grading of IJV compression/stenosis between 0 (none) and 3 (severe). Examples at the upper IJV level (C1-C3) demonstrate no stenosis (A) or mild (B), moderate (C), and severe (D) stenosis (arrows).