Maximilian N Voelker1, Oliver Kraff2, Daniel Brenner3, Astrid Wollrab4, Oliver Weinberger5, Moritz C Berger6, Simon Robinson7, Wolfgang Bogner7, Christopher Wiggins8, Robert Trampel9, Tony Stöcker3, Thoralf Niendorf5,10, Harald H Quick2,11, David G Norris2,12, Mark E Ladd2,6, Oliver Speck4,13,14,15. 1. Erwin L. Hahn Institute for Magnetic Resonance Imaging, University of Duisburg-Essen, Kokereiallee 7, 45141, Essen, Germany. Maximilian.Voelker@uni-due.de. 2. Erwin L. Hahn Institute for Magnetic Resonance Imaging, University of Duisburg-Essen, Kokereiallee 7, 45141, Essen, Germany. 3. German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany. 4. Department of Biomedical Magnetic Resonance, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany. 5. Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany. 6. Medical Physics in Radiology, German Cancer Research Center (dkfz), Heidelberg, Germany. 7. Department of Biomedical Imaging and Image-guided Therapy, High Field MR Center, Medical University of Vienna, Vienna, Austria. 8. Scannexus, Maastricht, Netherlands. 9. Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany. 10. Experimental and Clinical Research Center, A Joint Cooperation Between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine, Berlin, Germany. 11. High Field and Hybrid MR Imaging, University Hospital Essen, University Duisburg-Essen, Essen, Germany. 12. Donders Centre for Cognitive Neuroimaging, Nijmegen, Netherlands. 13. Leibniz Institute for Neurobiology, Magdeburg, Germany. 14. German Center for Neurodegenerative Disease (DZNE), Magdeburg, Germany. 15. Center for Behavioral Brain Sciences, Magdeburg, Germany.
Abstract
OBJECTIVE: This study evaluates the inter-site and intra-site reproducibility of 7 Tesla brain imaging and compares it to literature values for other field strengths. MATERIALS AND METHODS: The same two subjects were imaged at eight different 7 T sites. MP2RAGE, TSE, TOF, SWI, EPI as well as B1 and B0 field maps were analyzed quantitatively to assess inter-site reproducibility. Intra-site reproducibility was measured with rescans at three sites. RESULTS: Quantitative measures of MP2RAGE scans showed high agreement. Inter-site and intra-site reproducibility errors were comparable to 1.5 and 3 T. Other sequences also showed high reproducibility between the sites, but differences were also revealed. The different RF coils used were the main source for systematic differences between the sites. CONCLUSION: Our results show for the first time that multi-center brain imaging studies of the supratentorial brain can be performed at 7 T with high reproducibility and similar reliability as at 3T. This study develops the basis for future large-scale 7 T multi-site studies.
OBJECTIVE: This study evaluates the inter-site and intra-site reproducibility of 7 Tesla brain imaging and compares it to literature values for other field strengths. MATERIALS AND METHODS: The same two subjects were imaged at eight different 7 T sites. MP2RAGE, TSE, TOF, SWI, EPI as well as B1 and B0 field maps were analyzed quantitatively to assess inter-site reproducibility. Intra-site reproducibility was measured with rescans at three sites. RESULTS: Quantitative measures of MP2RAGE scans showed high agreement. Inter-site and intra-site reproducibility errors were comparable to 1.5 and 3 T. Other sequences also showed high reproducibility between the sites, but differences were also revealed. The different RF coils used were the main source for systematic differences between the sites. CONCLUSION: Our results show for the first time that multi-center brain imaging studies of the supratentorial brain can be performed at 7 T with high reproducibility and similar reliability as at 3T. This study develops the basis for future large-scale 7 T multi-site studies.
Entities:
Keywords:
Magnetic resonance imaging; Multi-center; Neuroimaging; Ultrahigh field
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