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• W2087991208 endingPage "3864" @default.
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• W2087991208 abstract "A new method is proposed for scatter-correction of cone-beam CT images. A coarse reconstruction is used in initial iteration steps. Modelling of the x-ray tube spectra and detector response are included in the algorithm. Photon diffusion inside the imaging subject is calculated using the Monte Carlo method. Photon scoring at the detector is calculated using forced detection to a fixed set of node points. The scatter profiles are then obtained by linear interpolation. The algorithm is referred to as the coarse reconstruction and fixed detection (CRFD) technique. Scatter predictions are quantitatively validated against a widely used general-purpose Monte Carlo code: BEAMnrc/EGSnrc (NRCC, Canada). Agreement is excellent. The CRFD algorithm was applied to projection data acquired with a Synergy XVI CBCT unit (Elekta Limited, Crawley, UK), using RANDO and Catphan phantoms (The Phantom Laboratory, Salem NY, USA). The algorithm was shown to be effective in removing scatter-induced artefacts from CBCT images, and took as little as 2 min on a desktop PC. Image uniformity was greatly improved as was CT-number accuracy in reconstructions. This latter improvement was less marked where the expected CT-number of a material was very different to the background material in which it was embedded." @default.
• W2087991208 created "2016-06-24" @default.
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• W2087991208 date "2009-06-02" @default.
• W2087991208 modified "2023-10-10" @default.
• W2087991208 title "An efficient Monte Carlo-based algorithm for scatter correction in keV cone-beam CT" @default.
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• W2087991208 doi "https://doi.org/10.1088/0031-9155/54/12/016" @default.
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• W2087991208 hasPublicationYear "2009" @default.
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