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Qiao Yang M. Sc.

Alumnus of the Pattern Recognition Lab of the Friedrich-Alexander-Universität Erlangen-Nürnberg

Accelerated quantitative multi-material beam hardening correction(BHC) in cone-beam CT
In computed tomography (CT), non-linear characteristics of beam hardening are caused by polychromaticity of x-rays, which severely degrade CT image quality and diagnostic accuracy. Current correction approaches used in clinical CT are mainly based on water-equivalent calibration and recent scientific researches published an extension of including dense bones in the scan field. This approach makes assumptions of certain material types, which are only partially valid and may lead to suboptimal corrections. Other correction techniques are limited in correction effectiveness and computational complexity on cone beam geometry, when scanned objects consist of more than one material. In this study, we present a new BHC approach which models the polychromatic x-rays with physical characteristics. The aim of our study is to effectively reduce beam hardening with increased applicability to various kinds of datasets for cone beam CT.






Related publication:

Q. Yang, M. Elter, H. Scherl; Accelerated quantitative multi-material beam hardening correction(BHC) in cone-beam CT; European Congress of Radiology (ECR) 2012, Vienna, Austria, 01-05.03.2012. DOI: 10.1594/ecr2012/C-2161