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  • Title: Signal filtering algorithm for depth-selective diffuse optical topography.
    Author: Fujii M, Nakayama K.
    Journal: Phys Med Biol; 2009 Mar 21; 54(6):1419-33. PubMed ID: 19218735.
    Abstract:
    A compact filtered backprojection algorithm that suppresses the undesirable effects of skin circulation for near-infrared diffuse optical topography is proposed. Our approach centers around a depth-selective filtering algorithm that uses an inverse problem technique and extracts target signals from observation data contaminated by noise from a shallow region. The filtering algorithm is reduced to a compact matrix and is therefore easily incorporated into a real-time system. To demonstrate the validity of this method, we developed a demonstration prototype for depth-selective diffuse optical topography and performed both computer simulations and phantom experiments. The results show that the proposed method significantly suppresses the noise from the shallow region with a minimal degradation of the target signal.
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