Martin Krmer1,
Jrgen R. Reichenbach1
1Medical
Physics Group, Institute of Diagnostic and Interventional Radiology I, Jena
University Hospital - Friedrich Schiller University Jena, Jena, Germany
Novel reconstruction technique for PROPELLER-EPI which requires no additionally measured field map for distortion correction. By modulating the input data with constant frequency offsets the effective resonance frequency on which the image is reconstructed is modulated, enabling autocalibrated PROPELLER-EPI reconstruction. The theory of the technique is explained in detail including a proposed algorithm for automatic detection of on resonant image parts. We compare the proposed method to standard PROPELLER-EPI image reconstruction using statically measured field maps showing that comparable results can be achieved.