Iterative Motion Compensation and Estimation in Magnetic Resonance Imaging (MRI)

Joseph V. Fritz; Peter D. Scott; Vernice Bates

doi:10.1117/12.953243

25 May 1989 Iterative Motion Compensation and Estimation in Magnetic Resonance Imaging (MRI)

Joseph V. Fritz, Peter D. Scott, Vernice Bates

Proceedings Volume 1092, Medical Imaging III: Image Processing; (1989) https://doi.org/10.1117/12.953243
Event: Medical Imaging III, 1989, Newport Beach, CA, United States

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.

Citation Download Citation

Joseph V. Fritz, Peter D. Scott, and Vernice Bates "Iterative Motion Compensation and Estimation in Magnetic Resonance Imaging (MRI)", Proc. SPIE 1092, Medical Imaging III: Image Processing, (25 May 1989); https://doi.org/10.1117/12.953243

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