Abstract #3882

Comparison of 2D and 3D EPI for high-resolution functional imaging at 7T MRI

Hankyeol Lee¹, Rüdiger Stirnberg², Tony Stöcker^2,3, and Kâmil Uludağ^1,4,5

¹Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon, Republic of Korea, ²German Centre for Neurodegenerative Diseases (DZNE), Bonn, Germany, ³Department of Physics and Astronomy, University of Bonn, Bonn, Germany, ⁴Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Korea, Republic of, ⁵Techna Institute & Koerner Scientist in MR Imaging, University Health Network, Toronto, ON, Canada

This study presents the performance of 2D and 3D EPI sequences at 7T for functional imaging. Eleven subjects were scanned with individually optimized 2D and 3D EPI sequences with TR and total parallel imaging acceleration that were matched. Three spatial resolutions: 0.8 mm, 1.1 mm, and 1.7 mm isotropic, were used. Resulting temporal signal-to-noise ratios (tSNR) were compared between 2D and 3D EPI sequences, and their potential functional sensitivities are discussed. The results show images acquired with 3D EPI have higher tSNR at 0.8 mm and 1.1 mm resolutions, while 2D EPI images have higher tSNR at 1.7 mm resolution.

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