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Resulting pulse oximetry phantoms. (a) Elastic 50A “U-channel” samples that are clear (Top), made turbid with TiO2 (Middle) and turbid Elastic 50A fingertip phantom with 1.2 mm vessel geometry (Bottom). (b) Final CAD model for mold to perform casting of PDMS. C. TiO2-doped PDMS phantom with silicone tube.
