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Hyperspectral imaging (HSI) is a technology that with limited training can noninvasively measure oxygenated hemoglobin (oxyHb) and deoxygenated hemoglobin concentrations in the skin to create an oxygenation map. This pilot study determined whether HSI could be used to demonstrate vascular dysfunction in the upper extremity of patients with peripheral artery disease (PAD) and coronary artery disease...