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Power Doppler images are shown for the 22 and 17 second time points of the (a) in vivo arterial occlusion and (b) muscle contraction scans, respectively, for data processed with no median filter (first column), with median filters of size 35 (second column), 71 (third column), 141 (fourth column), and with no amplitude demodulation (fifth column). The corresponding B-mode images are shown in the last column.
