Abstract #1277

Submillimeter fMRI Acquisition using a dual-echo Rosette-k-space trajectory at 3T

Gianna Nossa¹, Humberto Monsivais¹, Seokkyoon Hong², Taewoong Park², Fethi Sila Erdil¹, Xin Shen³, Ali Caglar Özen⁴, Serhat Ilbey⁴, Mark Chiew⁵, Cecilia Steinwurzel⁶, Zoe Kourtzi⁶, Yen-Yu Ian Shih⁷, and Uzay Emir^1,2

¹School of Health Science, Purdue University, West Lafayette, IN, United States, ²Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, United States, ³Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States, ⁴Department of Radiology, Medical Center-University of Freiburg, Freiburg, Germany, ⁵Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada, ⁶Department of Psychology, University of Cambridge, Cambridge, United Kingdom, ⁷Biomedical Research Imaging Center, University of North Carolina Chapel Hill, Chapel Hill, NC, United States

Synopsis

Keywords: fMRI (task based), BrainIn this study, we overcome the technological barrier against acquiring submillimeter resolution (~ 0.5 mm) fMRI data at 3T via a novel dual-echo Rosette k-space design. This design results in fine representation of activation maps in two different functional tasks and might be a springboard in neuroimaging by providing a very high-resolution spatiotemporal dynamics of neural networks. The method will be further evolved with the feedback from the MRI community via the github platform as such for the further acceleration, inflow saturation and 3D coverage via 3D sampling and/or multiband approaches.

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