Scatter correction using FBP with data rearrangement for a single full scan CBCT

Abstract A scattering plate consisting of multiple lead strips is an effective tool for scatter correction and dose reduction in cone-beam CT(CBCT). Existing methods take advantage data redundancy by partially blocking cone beam from a single scan to make up perform correction. However, geometric objects with large angles during CBCT scans, existing backprojection-filteration(BPF) algorithms cannot accurately reconstruct the object due inconsistency truncation, may produce additional image artifacts. In order improve quality at angles, this paper proposes hybrid method filteration-backprojection (FBP) reconstruction blocked using rearrangement. The proposed uses blocker that are placed between light source provide beam-blocked data. combination rearrangement algorithm, projection rearranged into tilted parallel data, followed weighted filtering inverse reconstruction. experimental results show effectively corrects each reconstructs scatter-corrected scan.