NIR imaging offers the opportunity to see through flowing blood and thus to look at cardiac and blood vessel anatomy and tissue in real time. The basic physics behind this technology is well established. Austrian scientist Gustav Mie published research in 1908 on the interaction between light waves and particles when they are approximately the same size. This original work has been used to see through fog and smoke or through mist and clouds. The theory teaches that one can see through an otherwise translucent media filled with particles by adjusting the wavelength of light into the near infrared band.