Hemodynamic Analysis Using 4D Flow MRI in a Case of Aortic Dissection With Aberrant Right Subclavian Artery.

Four-dimensional flow magnetic resonance imaging (4D flow MRI) was utilized to analyze an aortic dissection with an aberrant right subclavian artery, revealing vortex formation and an increased oscillatory shear index (OSI), both indicative of variations in wall shear stress. An elevated OSI has been associated with an elevated risk of aortic dissection.

Evaluation of flow dynamics in distal stent graft-induced new entry using 4D flow MRI.

Distal stent graft-induced new entry may occur after stent grafting for aortic dissection. Four-dimensional magnetic resonance imaging is useful for predicting outcomes, showing accelerated flow and increased wall shear stress, indicating further false lumen expansion.

Four-dimensional flow magnetic resonance imaging for assessment of hemodynamic changes in the portal venous system before and after balloon-occluded retrograde transvenous obliteration: a pilot feasibility study.

Background: The effectiveness of four-dimensional (4D) flow magnetic resonance imaging (MRI) for assessing hemodynamic changes before and after balloon-occluded retrograde transvenous obliteration (BRTO) remains unclear.

Purpose: To evaluate the feasibility of 4D flow MRI for assessing hemodynamic changes in the portal venous system before and after BRTO.

Material And Methods: We included 10 patients (7 men, 3 women; mean age = 67 years) with liver cirrhosis who had a high risk of gastric variceal bleeding or hepatic encephalopathy.