Figure 3
Example images from a representative young healthy subject. High-resolution scout images located at isocenter (a) and 3 cm inferior (b), corresponding to the PASL and multi-echo GRE slice locations, respectively. The soleus is indicated in red (a) and green (b), and the blue arrow points to the peroneal vein. Perfusion images represent baseline (c) and peak hyperemic flow (d). Phase images are shown for baseline (e) and the washout time (f). Note the increased phase accrual in the three veins at washout time, corresponding to a decrease in SvO2. The blue arrow identifies the peroneal vein that was used for dynamic SvO2 analysis. Multi-echo GRE magnitude images for each of the echo times used to quantify T2* are shown in (g).