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Proceedings Paper

Iterative Motion Compensation and Estimation in Magnetic Resonance Imaging (MRI)
Author(s): Joseph V. Fritz; Peter D. Scott; Vernice Bates
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Paper Abstract

Motion artifacts in magnetic resonance images result from displacement of "isochromats" during the imaging interval. This motion is categorized into two classes: motion within a Free Induction Decay (FID) and motion between FID excitations. Furthermore, local regions in the spatial data being measured generally undergo unique motion profiles for each class, and each class may not consist of the same local segmentation. Models for each class are presented using a general digital signal processing (DSP) format and conversions from real world parameters to this normalized DSP domain are given. A multilevel motion model is then given, suggesting a layered approach to removing the spatial and class variant distortion functions. Finally, a method and simulation is presented for removing one of the more troublesome of these artifact layers, global patient movement.

Paper Details

Date Published: 25 May 1989
PDF: 12 pages
Proc. SPIE 1092, Medical Imaging III: Image Processing, (25 May 1989); doi: 10.1117/12.953243
Show Author Affiliations
Joseph V. Fritz, Amherst Systems Inc. (United States)
Peter D. Scott, State University of New York at Buffalo (United States)
Vernice Bates, Millard Fillmore Hospital (United States)

Published in SPIE Proceedings Vol. 1092:
Medical Imaging III: Image Processing
Samuel J. Dwyer; R. Gilbert Jost; Roger H. Schneider, Editor(s)

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