NON-INVASIVE MULTI-FREQUENCY OXYGENATION SPECTROSCOPY DEVICE USING NIR DIFFUSE PHOTON DENSITY WAVES FOR MEASUREMENT AND PRESSURE GAUGES FOR PREDICTION OF PRESSURE ULCERS

摘要

Multi-frequency Diffuse Photon Density Wave (DPDW) methodology at near infrared wavelengths is used to non-invasively measure the optical absorption and reduced scattering coefficients of tissue at depths of several millimeters to quantify the depth and degree of tissue damage. A digitally-controlled stepper motor and variable RF generator enable the user to select the distance between the light source and detector and the modulation frequency through software. This allows for the collection of virtually unlimited number of data points, enabling precise selection of the volume and depth of tissue that will be characterized.