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System diagram and experimental setup: broadband illumination is delivered to the imaging head from a 100-W QTH lamp via a liquid light guide. The digital DMD then encodes the light into sinusoidal intensity patterns which are projected onto the surface of the volar forearm. Diffusely reflected light is delivered to the spectrometer via an optical fiber. An automated blood pressure cuff provides modulation of distal hemodynamics through either venous or arterial occlusions.
