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Abstract #0360

FMRI using a 3D radial-Cartesian trajectory: spatio-temporal tunability and artifact correction

Nadine N Graedel 1 , Mark Chiew 1 , Jennifer A McNab 2 , and Karla L Miller 1

1 FMRIB Centre, University of Oxford, Oxford, Oxfordshire, United Kingdom, 2 Department of Radiology, Stanford University, California, United States

We propose the use of a 3D hybrid radial-Cartesian trajectory for functional MRI, in which the readout EPI planes are rotated around kz according to an angle scheme based on the golden ratio. This acquisition strategy facilitates correction for many sources of temporal fluctuation (such as motion and physiological noise) and allows flexible post-acquisition definition of spatio-temporal resolution. We implemented example corrections for motion and physiological noise, which allowed recovery of data corrupted by severe motion. Additionally we show visual fMRI data reconstructed at different temporal resolutions.

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