Abstract #1951

Phase contrast coronary blood velocity mapping with both high temporal and spatial resolution using Golden Angle rotated Spiral k-t Sparse Parallel imaging (GASSP)

Dan Zhu¹, Gabriele Bonanno^2,3, Robert G. Weiss^2,3, and Michael Schär³

¹Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD, United States, ²Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, United States, ³Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, United States

Coronary phase contrast MRI for accurate measurement of coronary blood flow requires high spatial resolution due to the small vessel size, and high temporal resolution due to cardiac motion, especially of the right coronary artery (RCA). This study uses golden angle rotated spiral k-t sparse parallel imaging (GASSP) to accelerate the acquisition to achieve both high spatial and high temporal resolution in a breath-hold. GASSP was validated in the stationary popliteal artery (knee) and then implemented in the RCA. GASSP achieved high image quality throughout the cardiac cycle and popliteal peak velocity and mean-square error compared favorably to gold standard.

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