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Power Doppler images of patient median nerves.
A. Longitudinal image shows increased vascularization which is orange to red in color.
B. Pulsatility index is 2.63 in axial sonogram.
C. Duplex Doppler ultrasonogram of another patient's pulsatility index was 6.1. Longitudinal image of median nerve shows swelling at carpal tunnel with abrupt increase in diameter and low level echogenicity.
