Diffusing wave spectroscopy (DWS) is a kind of dynamic light scattering technology

it is a technology which lets multi-light beam into materials containing dispersed phase

and then photons through different distances are scattered and leads to interference

spectrum signal shows white light spot

transforming speed of spot reflects velocity of material particles.DWS technology applied in the high turbidity not more transparent medium particle size

structure and their interactions.In recent years

DWS technology is mainly used in chemical industry (emulsion film forming process analysis and mechanism research of latex particle film-forming process) and food industry (gel viscoelastic

stability determination of different milk in emulsion foods and rheological properties characterization of non-emulsion food)

but application in medical literature reported less

it is mainly used for characterization of vascular blood flow and blood microcirculation

particle size analysis of suspension polymer in medicine.By investigating principle and application of DWS

this paper will prospect its development in medicine.