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Abstract #2534

B1+ Correction for 7T FID-CRT-MRSI

Philipp Lazen1, Bernhard Strasser1, Cornelius Cadrien1,2, Sukrit Sharma1, Lukas Hingerl1, Eva Niess1, Stanislav Motyka1, Alexandra Lipka1, Benjamin Spurny-Dworak3, Christoph Brandner4, Stephan Gruber1, Wolfgang Bogner1, Rupert Lanzenberger3, Karl Rössler2, Siegfried Trattnig1,5, and Gilbert Hangel1,2
1Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria, 2Department of Neurosurgery, Medical University of Vienna, Vienna, Austria, 3Department of Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria, 4Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, 5Institute for Clinical Molecular MRI, Karl Landsteiner Society, St. Poelten, Austria


We implemented B1+ correction for our metabolite concentration estimation and analyzed the influence of B1+ inhomogeneities. Since the B1+ field is relatively homogeneous in the center of the brain anyways, the biggest effects were observed closer to the fringes of the brain. The concentration estimates increased between 1.0% and 5.6% for different metabolites when comparing B1+ correction to simple T1 correction, remaining within the spectrum of values established by previous literature.

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