ABSTRACT
The penetration of light into tissue is basically determined by two different properties of the tissue: the scattering and the absorption. Optical transmission into the brain through the scalp and skull can be measured at wavelengths as short as those of blue light and as much as 10 percent of longer wavelengths (red or near IR) may reach brain cells. The space between the fingers of a hand was carefully masked, and a flash lamp was fired on one side of the hand; a color photograph taken on the other side by the transmitted light yielded a picture of a red hand. The light source used was connected to the fiber optics of a standard fibrogastroduodenoscope (Olympus or Putchok) to convey light to the defect to be treated. This chapter relates the proposed mechanism of low power laser action at cellular level to the effects found at organism level.
