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.
This abstract and the presentation materials are available to members only;
a login is required.
