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Abstract #1382

Phase-Adjusted Echo Time (PATE)-Averaging: Application for Glutamine Resolution at 3.0 Tesla

Andrew Paul Prescot1, Todd L. Richards2, Stephen R. Dager2, Perry Franklin Renshaw1

1Brain Institute, University of Utah, Salt Lake City, UT, United States; 2Radiology, University of Washington, Seattle, WA, United States

Proton (1H) magnetic resonance spectroscopy (MRS) investigations have reported altered glutamatergic neurotransmission in a variety of psychiatric disorders. The unraveling of glutamate from glutamine resonances is crucial for interpreting these observations although this remains challenging at clinical static magnetic field strengths. Glu resolution can be improved through an approach known as echo-time (TE)-averaging, which involves the acquisition and averaging of multiple TE steps. However, that method strongly attenuates Gln resonances. We have developed a novel approach termed phase-adjusted TE (PATE)-averaging for retrieving Gln signals from a TE-averaged 1H MRS dataset. Preliminary simulation and in vivo data are presented.