Reproducibility of 13C labeling of glutamate and glutamine in human brain using selPOCE MRS at 7T upon [U-13C]-labeled glucose infusion

The aim of this study is to assess the reproducibility of a selective proton-observed, carbon-edited (selPOCE) MRS sequences for the detection of glutamate/glutamine cycling at 7T in healthy participants. Participants were scanned twice while undergoing [U-13C] glucose infusion. The time course of Glu C45 and Gln C45 labeling were similar for test-retest measurements. This supports the application in future studies on measuring neuroenergetics and neurotransmitter cycling.