Iterative metal artifact reduction for x-ray computed tomography using unmatched projector/backprojector pairs

• Published in: Medical physics (Lancaster) Vol. 43; no. 6; pp. 3019 - 3033
• Main Authors: Zhang, Hanming, Wang, Linyuan, Li, Lei, Cai, Ailong, Hu, Guoen, Yan, Bin
• Format: Journal Article
• Language: English
• Published: United States American Association of Physicists in Medicine 01.06.2016
• Subjects: 60 APPLIED LIFE SCIENCES; Biological material, e.g. blood, urine; Haemocytometers; Computed tomography; Computer modeling; Computerised tomographs; computerised tomography; COMPUTERIZED TOMOGRAPHY; DATA ACQUISITION; Data acquisition: hardware and software; Digital computing or data processing equipment or methods, specially adapted for specific applications; General statistical methods; Gold; Image data processing or generation, in general; image matching; image reconstruction; ITERATIVE METHODS; iterative reconstruction; Mars; mean square error methods; Medical image artifacts; medical image processing; Medical image reconstruction; metal artifact reduction; METALS; minimisation; Nonmetals; Numerical optimization; RADIATION PROTECTION AND DOSIMETRY; Reconstruction; unmatched projector/backprojector pairs; X RADIATION; X‐ray imaging; computed tomography; iterative reconstruction; metal artifact reduction; unmatched projector/backprojector pairs

Purpose: Metal artifact reduction (MAR) is a major problem and a challenging issue in x-ray computed tomography (CT) examinations. Iterative reconstruction from sinograms unaffected by metals shows promising potential in detail recovery. This reconstruction has been the subject of much research in r...