5/27/2006 12:54:00 AM   2006-05-27 Diffusion Tensor Imaging "Diffusion weighted imaging uses the diffusion of water molecules to probe the directional micro-structure of living tissue. A single diffusion weighted image generally measures diffusivity of water molecules along a particular direction. The amount of diffusion along a direction is detected by destructive interference of different phase signatures created by the magnetic gradient." Correlations with weather data, (specifically "Window") [pdf]http://www.google.com/url?sa=U&start=1&q=http://spl.harvard.edu:8000/pages/papers/martha/DTI_Tech354.pdf&e=9797