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Abstract #3453

Phase-Cycled Segmented Center-Out Echo Planar Spectroscopic Imaging Sequence

Christian Labadie1,2, Stefan Hetzer3, Toralf Mildner1, Monique Aubert-Frcon2, Harald E. Mller1

1Max Planck Institute for Human Cognitive & Brain Sciences, Leipzig, Germany; 2Laboratoire de Spectromtrie Ionique et Molculaire, Universit Claude Bernard Lyon 1, France; 3Bernstein Center for Computational Neuroscience, Berlin, Germany

Segmented center-out echo planar spectroscopic imaging implements a k-t-space sampling that reduce the convolution of spatial and temporal encoding by privileging the concomitant acquisition of center k-space lines. Because of the considerable acceleration, a water reference scan can be measured in a few seconds along with a template scan for the realignment of forward and reflected ADC. Spectral Nyquist ghosts that may arise from the use of strong flyback rewinders can be effectively handled by implementing a sixteen step EXOR phase cycling and enables the detection of the J-coupled resonance of glutamate in 2.1 min.