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"These inequalities are compounded by how various neuroimaging techniques don’t serve Black patients well. Electroencephalography (EEG), which monitors electrical signals that emanate from the brain, is not optimized for Black hair, so participants may have to shave their heads or be excluded from studies completely. Increasingly popular light-based techniques, such as functional near-infrared spectroscopy (fNIRS), have not been corrected for those with higher melanin contents in their skin, which can lead to confounding or less accurate results. This has also been seen with pulse oximetry, a measure of oxygen saturation within your blood, a vital parameter in bedside patient monitoring."
