Abstract #4374

Parallel Reconstruction for Cartesian Golden Step MRI with Arbitrary Temporal Resolution, Field-Of-View & Acceleration Rate.

Haris Saybasili¹, J. Andrew Derbyshire¹, Liheng Guo², Ozan Sayin², Annette M. Stine¹, Robert J. Lederman¹, Daniel A. Herzka²

¹National Heart Lung & Blood Institute, National Institutes of Health, Bethesda, MD, United States; ²Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD, United States

This work describes a fully auto-calibrated GRAPPA approach for the reconstruction of Golden-step Cartesian MRI data. Golden-step Cartesian MRI advances the phase encoding gradients in steps of the golden fraction of the k-space support region. The resulting data sets are non-uniformly sampled in the phase encode direction and have advantageous properties for real-time imaging, permiting arbitrary and retrospective selection of temporal resolution, FOV and parallel imaging acceleration rate. In our approach the Golden-step MRI data are mapped onto the nearest Cartesian grid position using 1D SC-GROG. GRAPPA is then applied to estimate missing lines prior to a standard FFT reconstruction.