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Traditionally, the redundant data in the circular half\u2010scan range is weighted by a central scanning plane\u2010dependent weighting function; FDK algorithm is then applied on the weighted projection data for reconstruction. However, this scheme still suffers the attenuation coefficient drop inherited with FDK when the cone angle becomes large. A new heuristic cone beam geometry\u2010dependent weighting scheme is proposed based on the idea that there exists less redundancy for the projection data away from the central scanning plane. The performance of FDKHSCW scheme is evaluated by comparing it to the FDK full\u2010scan (FDKFS) scheme and the traditional FDK half\u2010scan scheme with Parker\u2032s fan beam weighting function (FDKHSFW). Computer simulation is employed and conducted on a 3D Shepp\u2010Logan phantom. 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