Abstract #3716

4D-EPICS:Compressed Sensing EPI for highly accelerated fMRI at 7T

Thomas Roos^1,2, Lukas Gottwald³, Tomas Knapen^1,4, Benedikt Poser⁵, and Wietske van der Zwaag¹

¹Spinoza Centre for Neuroimaging, Amsterdam, Netherlands, ²Delft University of Technology, Delft, Netherlands, ³Radiology and Nuclear Medicine, Amsterdam UMC, Amsterdam, Netherlands, ⁴Cognitive Psychology, Vrije Universiteit Amsterdam, Amsterdam, Netherlands, ⁵Maastricht Brain Imaging Centre, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, Netherlands

The proposed EPICS readout takes a traditional EPI readout and makes it suitable for Compressed Sensing. This novel readout keeps the EPI direction constant and employs pseudo-spiral under-sampling on a Cartesian grid in the other two (phase encoded) directions. EPICS delivers the flexibility offered by spiral sequences with the relative ease of Cartesian CS reconstruction. Multiple spiral types and patterns with flexible T_E's are compared. In-vivo brain image data shows good image quality at 7T. Future 4D-EPICS fMRI acquisitions will be able to profit from regularized CS reconstructions.

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