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Finite element analysis of gradient coil deformation and vibration in NMR microscopy

Chu, W. C. and Ahn, C. B. and Bavarian, B. and Mourad, Sherif A. and Jacobs, Russell E. (1992) Finite element analysis of gradient coil deformation and vibration in NMR microscopy. IEEE Transactions on Medical Imaging, 11 (3). pp. 330-335. ISSN 0278-0062. http://resolver.caltech.edu/CaltechAUTHORS:CHUieeetmi92

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Abstract

Resolution degradation due to gradient coil deformation and vibration in NMR microscopy is investigated using finite element analysis. From the analysis, deformations due to the Lorentz force can be as large as 1-10 μm depending on the gradient strength and coil frame material. Thus, these deformations can be one of the major resolution limiting factors in NMR microscopy. Coil vibration, which depends on the input current waveform and resolution degradation due to time-variant deformation and time-invariant deformation are investigated by numerical simulations.


Item Type:Article
Additional Information:© Copyright 1992 IEEE. Reprinted with permission. Manuscript received September 22, 1991; revised January 14, 1992. This work was supported in part by the NIH under Grant HD 25390. R.E. Jacobs is an Established Investigator of the American Heart Association. The authors would like to thank Computers and Structural, Inc. for its “SAP90” software used for the FEM analysis in this research.
Subject Keywords:coils; finite element analysis; nuclear magnetic resonance imaging; vibrations
Record Number:CaltechAUTHORS:CHUieeetmi92
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:CHUieeetmi92
Alternative URL:http://dx.doi.org/10.1109/42.158936
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9746
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:12 Mar 2008
Last Modified:26 Dec 2012 09:52

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