Investigations on the effect of caffeine on cerebral venous vessel contrast by using susceptibility-weighted imaging (SWI) at 1.5, 3 and 7 T. - Jan Sedlacik; Katharina Helm; Alexander Rauscher; Jörg Stadler; Hans-Joachim Mentzel; Jürgen R. Reichenbach (NeuroImage, 2008)