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Metal artifact reduction in CT by identifying missing data hidden in metals

Title
Metal artifact reduction in CT by identifying missing data hidden in metals
Authors
Hyoung Suk Park;Jae Kyu Choi;Jin Keun Seo;Jong Chul Ye;Sang-Hwy Lee;Kyung Sang Kim;Kyung-Ran Park
Issue Date
2013
Journal Title
Journal of X-ray Science and Technology
ISSN
0895-3996
Citation
Journal of X-ray Science and Technology, Vol.21(3) : 357~372, 2013
Abstract
There is increasing demand in the field of dental and medical radiography for effective metal artifact reduction (MAR) in computed tomography (CT) because artifact caused by metallic objects causes serious image degradation that obscures information regarding the teeth and/or other biological structures. This paper presents a new MAR method that uses the Laplacian operator to reveal background projection data hidden in regions containing data from metal. In the proposed method, we attempted to decompose the projection data into two parts: data from metal only (metal data), and background data in the absence of metal. Removing metal data from the projections enables us to perform sparsity-driven reconstruction of the metal component and subsequent removal of the metal artifact. The results of clinical experiments demonstrated that the proposed MAR algorithm improves image quality and increases the standard of 3D reconstruction images of the teeth and mandible
URI
http://iospress.metapress.com/content/ch443k6824434n30/?genre=article&issn=0895-3996&volume=21&issue=3&spage=357

http://ir.ymlib.yonsei.ac.kr/handle/22282913/87743
DOI
10.3233/XST-130384
Appears in Collections:
1. 연구논문 > 2. College of Dentistry > Dept. of Oral and Maxillofacial Surgery
Yonsei Authors
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