New technique for visualizing blood flow involves carbon nanotubes and lasers December 2, 2012 by Bjorn Carey

Stanford scientists have developed a fluorescence imaging technique that allows them to view the pulsing blood vessels of living animals with unprecedented clarity. Compared with conventional imaging techniques, the increase in sharpness is akin to wiping fog off your glasses.

Read more at: http://phys.org/news/2012-12-technique-visualizing-blood-involves-carbon.html#jCp