Abstract #0518

Distortion correction of Golden Angle radial images with GIRF-predicted k-space trajectories using the gradient waveform history

Adrienne E Campbell-Washburn¹, Robert J Lederman¹, Anthony Z Faranesh¹, and Michael S Hansen¹

¹Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States

Balanced SSFP Golden Angle radial imaging uses a rapidly varying gradient scheme and thus is susceptible to image distortion caused by gradient delays and eddy currents. We propose that storing a history of the gradient waveforms in each axis can enable us to better predict our true k-space coordinates during sampling. We use the gradient system impulse response function to predict k-space coordinates and demonstrate reduced image distortion (shading and streaking) in a phantom and in vivo when utilizing the gradient waveform history. This method will be useful for dynamic and real-time imaging with Golden Angle balanced SSFP imaging schemes.

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