Abstract #1231

Imaging of aortic valve dynamics: comparison between sub-millisecond MRI and echocardiography

Alessandro M Scotti¹, Qingfei Luo¹, Zheng Zhong², Noreen T Nazir³, Karen L Xie⁴, and Xiaohong Joe Zhou^1,4,5,6

¹Center for MR Research, University of Illinois at Chicago, Chicago, IL, United States, ²Department of Radiology, Stanford University, Stanford, CA, United States, ³Division of Cardiology, Department of Medicine, University of Illinois at Chicago, Chicago, IL, United States, ⁴Department of Radiology, University of Illinois at Chicago, Chicago, IL, United States, ⁵Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, United States, ⁶Department of Biomedical Engineering, University of Illinois at Chicago, Chicago, IL, United States

Synopsis

The aortic valve dynamics is traditionally examined using ultrasound echocardiography in clinical practice. Recently, a novel MRI technique capable of sub-millisecond temporal resolution, coined get-SPEEDI MRI, was successfully applied to visualize the aortic valve dynamics. We have evaluated both get-SPEEDI and echocardiography on healthy human subjects and found a substantial agreement between both techniques in the characterization of the aortic valve opening and closing phases. The sub-millisecond temporal resolution of get-SPEEDI allows for the measurement of steep AVA variations and the visualization of detailed features that may reflect the cardiac function and physiology.

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