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 Ugander^1,2, 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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