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Proceedings Paper

Nonlinear compensation of distortions introduced by the presence of metal objects in magnetic resonance imaging
Author(s): Francis M. Bui; Ken Bott; Martin P. Mintchev
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Paper Abstract

Magnetic resonance imaging exhibits technical characteristics that make it invaluable in medical diagnosis. However its full potential has been severely limited by the presence of imaging artifacts. These artifacts cause distortions in the obtained images, which no longer represent faithfully the object being imaged. In this work, we study the particular type of artifact known as magnetic susceptibility differences artifacts, caused by the presence of a ferromagnetic source. Previously, we have quantified these artifacts from three different perspectives: (1) pixel displacement, (2) blurring and (3) non-linearity. However, the non-linear distortions were quantified using a single-parameter non-linear function. In the present study, a multiparameter non-linear function based on polynomial series is used in the optimization. The results show that this modification allows for more flexibility and, as a result, improves the optimization algorithm.

Paper Details

Date Published: 3 July 2001
PDF: 8 pages
Proc. SPIE 4322, Medical Imaging 2001: Image Processing, (3 July 2001); doi: 10.1117/12.431163
Show Author Affiliations
Francis M. Bui, Univ. of Calgary (Canada)
Ken Bott, GE Medical Systems Canada (Canada)
Martin P. Mintchev, Univ. of Calgary and Univ. of Alberta (Canada)

Published in SPIE Proceedings Vol. 4322:
Medical Imaging 2001: Image Processing
Milan Sonka; Kenneth M. Hanson, Editor(s)

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