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Abstract #2259

Reducing k-space gaps of golden angle rotated spiral MRI binned into cardiac frames applied to flow measurements of the coronary arteries

Dan Zhu1,2 and Michael Schär2
1Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, United States, 2Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, United States

Velocity encoded MRI has clinical significance in the diagnosis of coronary artery disease. High spatial and temporal resolution increase the accuracy and reproducibility and preserve reliable flow pattern. By using rotated golden angle with k-t space reconstruction and retrospective cardiac gating, high quality flow CINE could be achieved with high spatial and temporal resolution during a single breath-hold. However, binning to cardiac frames may lead to large gaps in k-space. In this work, we propose a new scheme of rotated golden angle and optimized retrospective gating by shifting the binning window. Improved image quality is demonstrated with the proposed methods.

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