Active Acoustic Screening: Reduction of Noise in Gradient Coils by Lorentz Force Balancing
- 1 February 1995
- journal article
- research article
- Published by Wiley in Magnetic Resonance in Medicine
- Vol. 33 (2) , 276-281
- https://doi.org/10.1002/mrm.1910330220
Abstract
We have designed and constructed a quiet gradient set with restricted access for the combined purposes of evaluating the principles of active acoustic screening, recently introduced by Mansfield, Glover, and Bowtell, and for EPI studies of the head at 3.0 T. The design utilizes the return paths of the conductors in a closed arc loop arrangement to eliminate net Lorentz forces thereby attenuating acoustic noise especially at low frequency. This design should significantly reduce the dangers to patients of high noise levels, especially in high field magnetic resonance imaging systems.Keywords
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