In order to be able to non-invasively analyse the concentration and oxygenation of haemoglobin in the brain, muscle, and other tissues, Near Infrared Medical Imaging uses near infrared light between 650 and 950 nm. The diagnostic instrument is used to find alterations brought on by illness, damage, or mental activity. As it gives measurements of both oxygenated and deoxygenated haemoglobin concentrations, NIR can be considered a supplement to functional magnetic resonance imaging (fMRI) when it comes to studies of the brain. NIR "enables studies in populations of participants with experimental paradigms that are not susceptible to fMRI," according to the statement.
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