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Proceedings Paper

Algorithms for the reduction of CT artifacts caused by metallic implants
Author(s): Ernst Klotz; Willi A. Kalender; Roman Sokiransky; Dieter Felsenberg
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Paper Abstract

The paper presents an analysis of the different metal artefact generating effects in X-ray CT and discus3es several algorithmic approaches to reduce their influence. They all share a segmentation step in which the artefact-causing implants are automatically located in the more or less degraded original backprojected image and the subset of affected measurement data is identified. The original image is reconstructed from appropriately scaled ray data that permit a truthful display of implants and the proper assessment of their geometry. Algorithms discussed are simple data substitution by interpolation, data substitution by interpolation enhanced by reprojected high-contrast information and data correction by modelling of artefcat generating physical phenomena.

Paper Details

Date Published: 1 August 1990
PDF: 9 pages
Proc. SPIE 1234, Medical Imaging IV: PACS Systems Design and Evaluation, (1 August 1990); doi: 10.1117/12.18985
Show Author Affiliations
Ernst Klotz, Siemens AG (Germany)
Willi A. Kalender, Siemens AG (Germany)
Roman Sokiransky, Free Univ. Berlin (Germany)
Dieter Felsenberg, Free Univ. Berlin (Germany)


Published in SPIE Proceedings Vol. 1234:
Medical Imaging IV: PACS Systems Design and Evaluation
Samuel J. Dwyer; R. Gilbert Jost, Editor(s)

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