Abstract #4616

Non-Linear Reconstruction for Coil Sensitivity Calibration from Cartesian and non-Cartesian Data

H. Christian M. Holme¹ and Martin Uecker^1,2,3,4

¹Institute of Biomedical Imaging, Graz University of Technology, Graz, Austria, ²Institute for Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany, ³Partner Site Göttingen, DZHK (German Centre for Cardiovascular Research), Göttingen, Germany, ⁴Cluster of Excellence “Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells” (MBExC), University of Göttingen, Göttingen, Germany

Synopsis

Keywords: Parallel Imaging, Parallel ImagingWe compare the current de-facto standard for coil sensitivity calculation, ESPIRiT, to a non-linear reconstruction method, ENLIVE. While ENLIVE normally produces both images and coil sensitivies, we focus here on using it for calibration of the coil sensitivities. We applied ESPIRiT and ENLIVE to low-resolution subsets of a 3D Cartesian and a non-Cartesian spiral acquisition, using the resoluting coil profiles in a linear parallel imaging reconstruction. We showed that ENLIVE is substantially faster for a high number of channels and provides improved sensitivities in the non-Cartesian example.

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