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Abstract #3785

Fast, high resolution QSM of the brainstem at 7T using super-resolution 2D EPI

Andreas Ehrmann1, Beata Bachrata1,2, Korbinian Eckstein1, David Bancelin1, Pedro Lima Cardoso1, Charles Joseph Guthrie1, Siegfried Trattnig1,2, and Simon Daniel Robinson1,3,4
1High Field MR Centre, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria, 2Christian Doppler Laboratory for Clinical Molecular MR Imaging, Vienna, Austria, 3Department of Neurology, Medical University of Graz, Graz, Austria, 4Centre for Advanced Imaging, University of Queensland, Queensland, Australia

2D EPI-based Quantitative Susceptibility Mapping offers a means to localise brainstem structures very quickly. However, this comes at the price of limited achievable slice thickness, restricting the precision of the localisation. In this work, we develop a fast super-resolution reconstruction method for complex MRI data, allowing the reconstruction of high resolution magnitude and phase images, and hence also high resolution susceptibility maps. We demonstrate that the reconstructed super-resolution 2D EPI images significantly improve the visibility of small structures allowing for improved localisation of the brainstem and other small structures such as veins in the generated susceptibility maps.

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