DocumentCode :
1063964
Title :
The design and use of secondary shielding in MRI systems-experiments from 4 years of operation
Author :
Morad, R. ; Palkovich, A.
Author_Institution :
ELSCINT Cryomagn. Ltd., Oxford, UK
Volume :
24
Issue :
2
fYear :
1988
fDate :
3/1/1988 12:00:00 AM
Firstpage :
1288
Lastpage :
1291
Abstract :
Whole-body superconducting magnets are essential for MRI (magnetic resonance imaging) systems to perform spectroscopy and to get high-quality imaging. These magnets produce a large fringe field that interferes with other imaging equipment in a clinical environment. An approach to shielding magnets using primary shielding, which is comprised of a light-weight flux-return yoke near the magnet and secondary shielding in the desired direction, was developed. Primary shieldings for 0.5 T and 2 T were developed, built, and tested at the authors´ company, and installed at customer sites. It was found that this approach to shielding is the most cost effective in terms of using steel and achieving good homogeneity.
Keywords :
biomedical NMR; design engineering; magnetic shielding; superconducting magnets; 4 y; MRI systems; NMR imaging; clinical environment; cost effective; fringe field; high-quality imaging; homogeneity; light-weight flux-return yoke; operation; secondary shielding; shielding magnets; whole body superconducting magnets; Costs; Gaussian processes; Iron; Magnetic flux; Magnetic resonance imaging; Magnetic shielding; Optical imaging; Spectroscopy; Steel; Superconducting magnets;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.11473
Filename :
11473
Link To Document :
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