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Proceedings Paper

A comparison of four algorithms for metal artifact reduction in CT imaging
Author(s): Caroline Golden; Samuel R. Mazin; F. Edward Boas; Grace Tye; Pejman Ghanouni; Garry Gold; Marc Sofilos; Norbert J. Pelc
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Paper Abstract

Streak artifacts caused by the presence of metal have been a significant problem in CT imaging since its inception in 1972. With the fast evolving medical device industry, the number of metal objects implanted in patients is increasing annually. This correlates directly with an increased likelihood of encountering metal in a patient CT scan, thus necessitating the need for an effective and reproducible metal artifact reduction (MAR) algorithm. Previous comparisons between MAR algorithms have typically only evaluated a small number of patients and a limited range of metal implants. Although the results of many methods are promising, the reproducibility of these results is key to providing more tangible evidence of their effectiveness. This study presents a direct comparison between the performances, assessed by board certified radiologists, of four MAR algorithms: 3 non-iterative and one iterative method, all applied and compared to the original clinical images. The results of the evaluation indicated a negative mean score in almost all uses for two of the non-iterative methods, signifying an overall decrease in the diagnostic quality of the images, generally due to perceived loss of detail. One non-iterative algorithm showed a slight improvement. The iterative algorithm was superior in all studies by producing a considerable improvement in all uses.

Paper Details

Date Published: 16 March 2011
PDF: 12 pages
Proc. SPIE 7961, Medical Imaging 2011: Physics of Medical Imaging, 79612Y (16 March 2011); doi: 10.1117/12.878896
Show Author Affiliations
Caroline Golden, National Univ. of Ireland Galway (Ireland)
Stanford Univ. (United States)
Samuel R. Mazin, Stanford Univ. (United States)
F. Edward Boas, Stanford Univ. (United States)
Grace Tye, Stanford Univ. (United States)
Pejman Ghanouni, Stanford Univ. (United States)
Garry Gold, Stanford Univ. (United States)
Marc Sofilos, Stanford Univ. (United States)
Norbert J. Pelc, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 7961:
Medical Imaging 2011: Physics of Medical Imaging
Norbert J. Pelc; Ehsan Samei; Robert M. Nishikawa, Editor(s)

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