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Abstract #3715

3D sector-wise golden-angle (3D-SWIG) – Improved k-space uniformity after ECG binning compared to golden-angle profile ordering

Alexander Fyrdahl1, Joao G Ramos1, Martin Ugander1,2, and Andreas Sigfridsson1
1Department of Clinical Physiology, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden, 2The Kolling Institute, Royal North Shore Hospital, and Northern Clinical School, Sydney Medical School, University of Sydney, Sydney, Australia

A radial trajectory with a three-dimensional sector-wise golden-angle (3D-SWIG) profile ordering optimized for retrospective ECG-based binning is presented. Data are acquired in patches using a low-distorting and area-preserving mapping from a cube to a sphere. Within each patch, the readouts are ordered according to the double golden-angle scheme. By acquiring one patch per heartbeat, k-space uniformity is guaranteed even after ECG-binning, resulting in reduced radial streak artifacts.

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