Algorithm to reduce clip artifacts in CT images

Heang K. Tuy

doi:10.1117/12.59473

1 June 1992 Algorithm to reduce clip artifacts in CT images

Heang K. Tuy

Proceedings Volume 1652, Medical Imaging VI: Image Processing; (1992) https://doi.org/10.1117/12.59473
Event: Medical Imaging VI, 1992, Newport Beach, CA, United States

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.

Citation Download Citation

Heang K. Tuy "Algorithm to reduce clip artifacts in CT images", Proc. SPIE 1652, Medical Imaging VI: Image Processing, (1 June 1992); https://doi.org/10.1117/12.59473

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