Fig. 9.

Difference spectra of tissue with a high content of white matter (WM) and gray matter (GM) for the different measured time points after the oral administration of deuterated glucose relative to the reference measurement before the administration of labeled glucose. The third image shows the relative difference in the uptake of the different ²H-labeled metabolites between different voxels with a high GM and WM content at different time points. The difference spectra are summed spectra over all volunteers (n = 7).