Canadian Medical Guide > Analytical, Diagnostic and Therapeutic Techniques and Equipment > Diagnosis > Diagnostic Techniques and Procedures > Diagnostic Imaging > Spectroscopy, Near-Infrared Terms and Definitions

Spectroscopy, Near-Infrared

Medical Definition:	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 oxgenated 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.
Guide Notes:	a type of spectrum anal; DF: note short X ref
Previously Indexed:	Spectrophotometry, Infrared (1991-1996)

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