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Abstract #0677

Evaluating Echo Planar Spectroscopic Imaging with a Columnar Excitation for "Virtual Biopsies"

Michael S Yao1,2, Andrew Van3,4, James Gee2, Murray Grossman5, David J Irwin5,6, and M Dylan Tisdall2
1Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, United States, 2Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States, 3Department of Neurology, Washington University School of Medicine, St. Louis, MO, United States, 4Department of Biomedical Engineering, Washington University School of Medicine, St. Louis, MO, United States, 5Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States, 6Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States

Synopsis

Keywords: Quantitative Imaging, Quantitative ImagingThe acquisition of high-resolution quantitative measurements is of particular interest in studying the laminar structure and layer-specific pathology in the cerebral cortex. In this work, we propose a method to address this need by acquiring 1-D echo planar spectroscopic imaging (EPSI) as a "virtual biopsy" with 200 µm resolution along the readout direction. Our sequence yields expected spectra for common compounds and produces high-quality quantitative T2* and off-resonance measurements in ex vivo brain tissue. Our goal is to use this quantitative virtual biopsy to discriminate laminar variations in cortical iron deposition in diseases such as frontotemporal lobar degeneration (FTLD).

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