A noninvasive technique that uses the differential absorption properties of hemoglobin and myoglobin to evaluate tissue oxygenation and indirectly can measure regional hemodynamics and blood flow. Near-infrared light (NIR) can propagate through tissues and at particular wavelengths is differentially absorbed by oxygenated vs. deoxygenated forms of hemoglobin and myoglobin. Illumination of intact tissue with NIR allows qualitative assessment of changes in the tissue concentration of these molecules. The analysis is also used to determine body composition
Near infrared spectroscopy -- Congresses : Sense the real change : proceedings of the 20th International Conference on Near Infrared Spectroscopy / Xiaoli Chu, Longhai Guo, Yue Huang, Hongfu Yuan, editors
