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Abstract #1784

Investigating the Effects of Concurrent Magnetic Field Monitoring on High Angular Resolution Diffusion Imaging: Application to Cortical Parcellation

Yoojin Lee1,2, Bertram Wilm1, Tara Ganepola3,4, Alexander Leemans5, Martin I. Sereno6, Daniel C. Alexander4, Klaas Pruessmann1, and Zoltan Nagy2

1Institute for Biomedical Engineering, ETH Zürich, Zürich, Switzerland, 2Laboratory for Social and Neural Systems Research, University of Zürich, Zürich, Switzerland, 3Department of Cognitive, Perceptual and Brain Sciences, University College London, London, United Kingdom, 4Centre for Medical Image Computing, University College London, London, United Kingdom, 5Image Sciences Institute, University Medical Center Utrecht, Utrecht, Netherlands, 6Psychology Department and Neuroimaging Center, San Diego State University, CA, United States

The concurrent field monitoring has been proposed to eliminate image artifacts in diffusion imaging introduced by the long lasting eddy currents from the diffusion-encoding gradients. In this work we investigated the effects of field monitoring system on HARDI and applied the improved HARDI data to cortical parcellation. We showed that the field monitoring improved the HARDI data quality especially in anterior/posterior poles of the brain and air-tissue interfaces. This regional improvement was also clear in the cortical classification results, where the field monitoring improved the accuracy of the V1/V2 by 3%, compared to ~0.5% in the motor strip.

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