摘要: Ultrasound detection of capillary blood flow is difficult as provides a weak backscattered signal with small Doppler shift. To aid in the such signals, new algorithm introduced exploiting two powerful ideas. First, receiver developed by creating subspaces corresponding to expected and clutter signals. It then exploits fact that some basis vectors are very nearly perpendicular. By projecting input data onto perpendicular components subspace sensitive detector can be realized. Secondly, coherently sums inputs from several angles. In vitro ultrasound collected applied detector. The utilizing multiple angles shown detecting experimental down 5 mm/sec 6 mm diameter channel.
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