MRI phase contrast velocity and flow errors in turbulent stenotic jets
نویسندگان
چکیده
منابع مشابه
Phase contrast ultrashort TE: A more reliable technique for measurement of high-velocity turbulent stenotic jets.
Accurate measurement of peak velocity is critical to the assessment of patients with stenotic valvular disease. Conventional phase contrast (PC) methods for imaging high-velocity jets in aortic stenosis are susceptible to intravoxel dephasing signal loss, which can result in unreliable measurements. The most effective method for reducing intravoxel dephasing is to shorten the echo time (TE); ho...
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PURPOSE Evaluate spiral three-dimensional (3D) phase contrast MRI for the assessment of turbulence and velocity in stenotic flow. METHODS A-stack-of-spirals 3D phase contrast MRI sequence was evaluated in vitro against a conventional Cartesian sequence. Measurements were made in a flow phantom with a 75% stenosis. Both spiral and Cartesian imaging were performed using different scan orientati...
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Phase contrast MRI is a powerful tool for the assessment of blood flow. However, especially in the highly complex and turbulent flow that accompanies many cardiovascular diseases, phase contrast MRI may suffer from artifacts. Simulation of phase contrast MRI of turbulent flow could increase our understanding of phase contrast MRI artifacts in turbulent flows and facilitate the development of ph...
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Introduction: Blood flow dynamics has an important role in atherosclerosis initiation, progression, and thrombosis leading to occlusive arterial diseases [1]. Since the development of Phase Contrast MRI (PC-MRI), it has been widely used to measure the velocity and flow in blood vessels. Accuracy of the PC-MRI velocity measurements in a 1.5T scanner has previously been evaluated using Laser Dopp...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2008
ISSN: 1053-1807,1522-2586
DOI: 10.1002/jmri.21395