Abstract #2784

3D Golden-Angle Spiral Sparse Parallel-Imaging for Lumen Area Measurements of the Entire Proximal and Mid-Segments of the Coronary Arteries in a Breath-Hold

Michael Schär¹, Gabriele Bonanno^1,2, Allison G. Hays², and Robert G. Weiss^1,2

¹Russel H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, United States, ²Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States

Coronary artery endothelial function (CEF) could historically only be measured with invasive catheterization-based testing. Recently, 2-dimensional cine MRI in combination with isometric handgrip exercise was introduced to quantify CEF noninvasively. However, the MRI technique only assesses CEF at one or two locations in an artery and does not allow assessment of regional heterogeneity present throughout diseased vessels. The aim of this work was to develop high-resolution isotropic 3-dimensional cine coronary MRI that enables measures of coronary lumen area along the entire proximal and mid segments of the coronary arteries in a single breath-hold, a pre-requisite for future 3-dimensional CEF measurements.

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