2004
DOI: 10.1109/tasc.2004.831023
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Shielding Stray Magnetic Fields of Open High Field MRI Magnets

Abstract: We have developed a new magnet for open high field (0.7 T) MRI systems. Since MRI systems are installed in hospital sites, it is important to reduce stray magnetic fields of the magnets. We studied passive, active and hybrid shielding methods and compared them. In order to study feasibility of active shielding, we considered higher order multipole stray fields. We present details of the calculation method and the results.Index Terms-Linear programming, magnetic resonance imaging (MRI), multipole stray field, o… Show more

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“…The two strategies should not be completely isolated from each other, and possible combined applications of these strategies might be beneficial to high magnetic field shielding. Collaborative applications of active and passive shielding techniques have been described in a beneficial investigation . Even so, it is still possible for magnetic fields between a nozzle and patient skin to effect proton transport processes more or less.…”
Section: Discussionmentioning
confidence: 99%
“…The two strategies should not be completely isolated from each other, and possible combined applications of these strategies might be beneficial to high magnetic field shielding. Collaborative applications of active and passive shielding techniques have been described in a beneficial investigation . Even so, it is still possible for magnetic fields between a nozzle and patient skin to effect proton transport processes more or less.…”
Section: Discussionmentioning
confidence: 99%