<qa>  What is the effect of the 7T scanner on sensitivity?Compared to 3-4T, the 7T scanner is expected to improve sensitivity by a factor of two and improve contrast to noise for functional imaging and spectroscopy by a factor of two - four. However, realizing these goals for routine practice and whole brain coverage will require technical developments and integrating these developments into optimized data acquisition and processing strategies. Therefore, we plan to extend parallel imaging strategies, currently becoming available for 3T MRI, to 7T in order to realize the full gain in sensitivity and apply these techniques to obtain high resolution anatomical MRI, generate high temporal and spatial resolution perfusion images using arterial spin labeling techniques, generate high-temporal and spatial resolution functional images of the brain using blood oxygenation BOLD and perfusion based techniques, and test the usefulness of 7T for spectroscopic studies of metabolites of the brain. All of these developments will be performed on normal, healthy volunteers. 