Figure 5.

Susceptibility values measured inside the major cerebral veins across five healthy volunteers: (a) right and left internal cerebral veins (R-ICV, L-ICV); (b) right and left thalamo-striate veins (R-TSV, L-TSV); (c) right and left septal veins (R-SV, L-SV); and (d) vein of Galen (VoG) and straight sinus (StrS). The phase data were acquired before and after the administration of acetazolamide and caffeine with TE = 15 ms and a voxel resolution = (0.5 mm³). Each drug test was performed on separate days. The susceptibility values generated from the data acquired pre-administration of these drugs were averaged. The mean regional CBF values (in ml/100 g of tissue/min) surrounding these major veins are stated for each vaso-dynamic brain state.