Pelvic Vein Quantitative Flow Characterization Using 2D and 4D Flow MRI

The purpose of the study is to quantitatively characterize the flow in the pelvic venous structures using 2D and 4D flow MRI with the objective of establishing physiologic and pathologic parameters for downstream computational fluid dynamics analysis. Arm 1: To establish the baseline flow characteristics of the iliac veins in patients with no imaging evidence of iliac venous disease. Arm 2: To assess the flow characteristics of the iliac veins in patients with left iliac vein compression syndrome (a.k.a. May-Thurner syndrome). Arm 3: To assess the flow characteristics of the iliac veins in patients status post iliac stent placement.

NCT Number	NCT06888024
Lead Sponsor	Ningcheng Peter Li
Conditions	May-Thurner Syndrome, Iliac Venous Compression
Enrollment	15 participants
Start Date	2025-04-01
Primary Completion	2027-01-01 (estimated)
Study Completion	2027-01-01 (estimated)
Updated on ClinicalTrials.gov	2025-09-24