Nonlinear compensation of distortions introduced by the presence of metal objects in magnetic resonance imaging

3 July 2001 Nonlinear compensation of distortions introduced by the presence of metal objects in magnetic resonance imaging

Francis M. Bui, Ken Bott, Martin P. Mintchev

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Proceedings Volume 4322, Medical Imaging 2001: Image Processing; (2001) https://doi.org/10.1117/12.431163
Event: Medical Imaging 2001, 2001, San Diego, CA, United States

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 These artifacts cause distortions in the obtained images, which no longer represent faithfully the object being imaged.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.

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Francis M. Bui, Ken Bott, and Martin P. Mintchev "Nonlinear compensation of distortions introduced by the presence of metal objects in magnetic resonance imaging", Proc. SPIE 4322, Medical Imaging 2001: Image Processing, (3 July 2001); https://doi.org/10.1117/12.431163

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