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Abstract #2056

The magnitude point spread function is an inadequate measure of T 2 * -blurring in EPI

Laurentius Huber 1 , Maria Guidi 1 , Jozien Goense 2 , Toralf Mildner 1 , Robert Trampel 1 , Jessika Schulz 1 , Cornelius Eichner 1 , Robert Turner 1 , and Harald E Mller 1

1 Max Planck Institute for Human Cognitive & Brain Sciences, Leipzig, Germany, 2 University of Glasgow, United Kingdom

We investigated here how the T 2 * -decay during k -space acquisition in EPI affects the blurring of the resulting image. We show that the corresponding PSF broadening is an inadequate measure of describing the associated T 2 * -blurring. Based on theoretical and experimental results shown, we conclude that full k -space acquisition GE-EPI has higher effective resolution than half k -space acquisition GE-EPI or than SE-EPI. This helps to disentangle layer-dependent activation with higher effective resolution.

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