Different distribution patterns of blood flow velocity in venous stenosis segment in idiopathic intracranial hypertension using 7T 4D flow MRI

Motivation: The distribution pattern of blood flow velocity in venous sinus stenosis is worth exploring, and its screening value for venous stenting is unknown yet. Goal(s): To explore velocity distribution pattern in idiopathic intracranial hypertension (IIH) patients with venous stenosis and its relationships with clinical characteristics. Approach: Fifteen IIH patients with venous stenosis were scanned through 4D flow MRI with 7.0T scanner, and data was processed for the velocity distribution patterns. Results: Steady, ascending, and descending distribution patterns were identified. TPG, CSF pressure and stenosis rate were significantly different among three patterns, with significantly higher value in ascending velocity group. Impact: As a noninvasive imaging technique, 4D flow MRI may provide some support from a hemodynamic perspective for screening IIH patients who would benefit from venous manometry and venous stenting.