Jakob Asslnder1,2, Martin Blaimer2,
Felix A. Breuer2, Maxim Zaitsev1, Peter M. Jakob2,3
1Medical Physics,
Department of Diagnostic Radiology, University Medical Center Freiburg,
Freiburg, Germany; 2Research Center Magnetic Resonance Bavaria
(MRB), Wrzburg, Germany; 3Department of Experimental Physics 5,
University of Wrzburg, Wrzburg, Germany
COGNAC is a reconstruction method that allows encoding with arbitrary gradient fields. In this work a non-linear, radially symmetric gradient is used for frequency encoding, projecting the object onto concentric rings. For encoding the angular direction, conventional gradients were used in addition to the spatial information of the receiver coil array. Reconstruction is done with SPACE RIP, where an encoding matrix describes both, coil sensitivity profiles and phase encoding. This gives one the freedom to adjust sampling strategies to better complement the geometry of receiving coils and use non-linear gradients for reduction of peripheral nerve stimulations.
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