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Abstract #2405

Regional Variations of Metabolite Concentrations in the Rat Brain Assessed with in Vivo 1H MR Spectroscopy at 16.4T

Sung-Tak Hong1, Dvid Zsolt Balla1, Gunamony Shajan1, Changho Choi2, Rolf Pohmann1

1High-Field Magnetic Resonance Center , Max-Planck Institute for Biological Cybernetics, Tuebingen, Baden-Wuerttemberg, Germany; 2Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, TX, United States

Regional differences of metabolites in the rat brain were investigated by using localized in vivo 1H MR spectroscopy at 16.4T. Three regions, thalamus, striatum and hippocampus, were investigated with an ultra-short TE STEAM sequence. The results demonstrated significant variations in all metabolites except aspartate and NAA. The remarkable variation of spectra was the substantially decreased level of the Tau methylene signal at 3.25 ppm in thalamus. The significant increase of the GABA methylene signal at 1.89 ppm was also observed in thalamus.