The Feldkamp method (often referred to as the FDK algorithm) is a widely used reconstruction algorithm for generating 3D volumetric data from 2D projection images acquired by cone-beam CT scanners.
It extends the principles of the 2D Filtered Back-Projection (FBP) method to 3D cone-beam geometry. While technically an approximate reconstruction method designed for circular scanning trajectories, the Feldkamp method offers an excellent balance between computational speed and image quality. Due to this efficiency, it is adopted as the standard algorithm in many industrial Micro-CT inspection systems.
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