Abstract #1627
Segmented accelerated multi-shot diffusion imaging combined with reverse polarity gradient (RPG) correction
Jens Johansson1, Kerstin Lagerstrand2,3, Pär-Arne Svensson4, Jr-yuan George Chiou5, Bruno Madore5, Hanna Hebelka1,4, and Stephan Maier1,5
1Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden, 2Medical radiation sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden, 3Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden, 4Department of Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden, 5Department of Radiology, Brigham and Women's Hospital, Boston, MA, United States
Synopsis
The inherent low bandwidth along the phase encoding direction in diffusion-weighted imaging with echo-planar signal readout can cause severe image distortions. These artifacts arise near tissue boundaries and are caused by static magnetic field inhomogeneities. Correction of such artifacts can considerably improve clinical value. We combine a previously presented segmented accelerated multi-shot diffusion imaging method with reverse polarity gradient (RPG) for markedly improved reduction of geometric distortions.
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