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Fig. 3 | Arthritis Research & Therapy

Fig. 3

From: Hyperspectral imaging in systemic sclerosis-associated Raynaud phenomenon

Fig. 3

Representative images at baseline and 0, 10, and 20 min following cold challenge for SSc-RP and HC. HSI captures oxyHb and O2 sat gross visual changes in the fingertips during RP activity induced by cold water challenge. Hyperspectral images and the gross appearance of the hands were different between SSc-RP and HC with heatmaps for SSc-RP patients with more blue pixels for oxyHb and O2 sat, and more red pixels for deoxyHb, that correlates with visible fingertip pallor during RP activity induced by cold water challenge. Blue pixels for oxyHb and O2 sat and red pixels for deoxyHb were rare in HC images. Red: higher oxyHb [arbitrary units (AU)]; blue: lower oxyHb (AU)

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