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Minneapolis, Minnesota 55414


This study aims at investigating the blood hemodynamics with high spatiotemporal resolution in patients with brain aneurysms and AVMs as well as in healthy controls. Parameters such as peak blood velocity, wall shear stress and other derived parameters will be obtained from 4D flow MRI data acquired at ultra-high field strength (7 Tesla).

Study summary:

The hemodynamic factors responsible for hemorrhagic stroke, resulting in wide variations in the clinical management of underlying vascular lesions, especially when they are found in asymptomatic individuals or individuals with symptoms not related to the disease. Therefore, there is an urgent need for the development of reliable biomarkers based on hemodynamic parameters, which can then enable improvements in risk assessment in patients presenting with these lesions. This need can be met by non-invasive Magnetic Resonance Imaging (MRI) techniques that provide information on high resolution vascular anatomy, visualization of cerebral hemodynamics and quantitative information about blood velocity. However, such techniques as presently employed at 1.5 or 3 Tesla are limited by spatial resolution and prolonged data acquisition times. The primary goal of this proposal is to overcome these current limitations by exploiting Ultra-High Fields (UHF, i.e. ≥ 7 Tesla (7T)) to attain significantly higher spatial resolution, faster acquisitions and increased lesion conspicuity utilizing - Qualitative exploration of intracranial blood hemodynamics, - Quantitative imaging of the spatiotemporally resolved blood velocity vector, - Derivation of hemodynamic parameters.


Inclusion Criteria: - Subjects / Patients between 18 and 75 Exclusion Criteria: - Any kind of ferromagnetic implants. - MR-unsafe non-ferromagnetic implants. - Cardiac pacemakers. - A history of shrapnel or shot gun injury. - A body mass index > 40. - Severe claustrophobia. - Tattoos in the head/neck area or permanent makeup.



Primary Contact:

Principal Investigator
Bharathi Jagadeesan, MD
University of Minnesota

Backup Contact:


Location Contact:

Minneapolis, Minnesota 55414
United States

There is no listed contact information for this specific location.

Site Status: N/A

Data Source: ClinicalTrials.gov

Date Processed: November 18, 2019

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