Spectroscopic Imaging with Prospective Motion Correction and Retrospective Phase Correction

Thomas Lange¹, Julian Maclaren¹, Martin Buechert¹, Maxim Zaitsev¹

A method for prospective motion correction based on an optical tracking system has recently been proposed and has already been successfully applied to single voxel spectroscopy. In this work, the utility of prospective motion correction in combination with retrospective phase correction is evaluated for spectroscopic imaging in the human brain. Especially, the real-time adjustment of the outer volume suppression slabs appears to be crucial in vivo where lipid signal can drastically impair the spectral quality. The interleaved reference scan method is used to correct for motion-induced frequency drifts and to ensure correct phasing of the spectra across the whole slice.