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Abstract #3089

Real-time motion and retrospective receiver sensitivity correction for gluCEST using volumetric navigators (vNavs) at 7T

Esau Poblador Rodriguez1, Philipp Moser1, Sami Auno2, Korvinian Eckstein1, Stephan Gruber1, Benjamin Schmitt3, Andre van de Kouwe4, Siegfried Trattnig  1, and Wolfgang Bogner1
1High Field MR Centre, Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria, 2Department of Physics, University of Helsinky, Helsinki, Finland, 3Siemens Healthineers, Sydney, Australia, 4Harvard Medical School, Boston, MA, United States

CEST is susceptible to subject motion not only due to misregistration of MR images acquired over time and subsequent alterations of B0 field, but also due to the related receiver sensitivity (B1-) inhomogeneities. We propose to correct for ∆B1- from the images generated by an interleaved EPI navigator used for prospective motion correction. We show the benefit of the proposed method, in combination with B1+ and dynamic B0 corrections, to restore a glutamate weighted CEST map in an active healthy volunteer.

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