Abstract #0947

An interleaved spherical stack-of-spirals trajectory for fast segmented whole brain fMRI

Bruno Riemenschneider¹, Jakob Assländer¹, Pierre Levan¹, and Jürgen Hennig¹

¹Medical Physics, University Medical Center Freiburg, Freiburg, Germany

We investigated a segmented version of the spherical stack-of-spirals trajectory that retains highly efficient data sampling and signal recovery, but grants more flexibility in data sampling compared to the single-shot version. Whole brain acquisition with nominal isotropic resolutions of 3mm in 195ms and 2.25mm in 260ms using 3- and 4-fold segmentation have been investigated. The faster read out along the slowest encoding direction leads to reduced off-resonance artifacts in comparison to the single- shot version, and higher sampling rates allow non-regularized reconstruction.

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