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Proceedings Paper

Algorithm to reduce clip artifacts in CT images
Author(s): Heang K. Tuy
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Paper Abstract

CT images of cross-sections containing metallic implants, such as prosthetic devices or tooth fillings, often have severe artifacts. Such artifacts may hinder medical diagnosis. We present an algorithm to reduce these artifacts. Unlike most algorithms available in the literature, instead of avoiding the use of data values along rays going through clips, we are making use of those data values explicitly to correct artifacts. Moreover, this new algorithm can be considered as an improvement over our previous algorithm in the sense that the sharpness of the final processed image is preserved even if projection data are not available. In this algorithm, we utilize both forward-projection and convolution back-projection very extensively, taking full advantage of our present capability to perform these processes accurately and with high speed. A significant improvement in image quality has been observed in both phantom and clinical studies.

Paper Details

Date Published: 1 June 1992
PDF: 9 pages
Proc. SPIE 1652, Medical Imaging VI: Image Processing, (1 June 1992); doi: 10.1117/12.59473
Show Author Affiliations
Heang K. Tuy, Picker International (United States)

Published in SPIE Proceedings Vol. 1652:
Medical Imaging VI: Image Processing
Murray H. Loew, Editor(s)

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