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X‐ray scatter correction algorithm for cone beam CT imaging
Author(s) -
Ning Ruola,
Tang Xiangyang,
Conover David
Publication year - 2004
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1711475
Subject(s) - imaging phantom , scanner , cone beam computed tomography , optics , beam (structure) , detector , cone beam ct , image guided radiation therapy , iterative reconstruction , image quality , computer science , interference (communication) , physics , medical imaging , computer vision , artificial intelligence , image (mathematics) , computed tomography , medicine , channel (broadcasting) , radiology , computer network
Developing and optimizing an x‐ray scatter control and reduction technique is one of the major challenges for cone beam computed tomography (CBCT) because CBCT will be much less immune to scatter than fan‐beam CT. X‐ray scatter reduces image contrast, increases image noise and introduces reconstruction error into CBCT. To reduce scatter interference, a practical algorithm that is based upon the beam stop array technique and image sequence processing has been developed on a flat panel detector‐based CBCT prototype scanner. This paper presents a beam stop array‐based scatter correction algorithm and the evaluation results through phantom studies. The results indicate that the beam stop array‐based scatter correction algorithm is practical and effective to reduce and correct x‐ray scatter for a CBCT imaging task.