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Open AccessArticle

Vibration and Noise in Magnetic Resonance Imaging of the Vocal Tract: Differences between Whole-Body and Open-Air Devices

1
Institute of Measurement Science, Slovak Academy of Sciences, 841 04 Bratislava, Slovak Republic
2
Faculty of Electrical Engineering and Information Technology, Slovak University of Technology in Bratislava, 812 19 Bratislava, Slovak Republic
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(4), 1112; https://doi.org/10.3390/s18041112
Received: 12 March 2018 / Revised: 4 April 2018 / Accepted: 4 April 2018 / Published: 5 April 2018
This article compares open-air and whole-body magnetic resonance imaging (MRI) equipment working with a weak magnetic field as regards the methods of its generation, spectral properties of mechanical vibration and acoustic noise produced by gradient coils during the scanning process, and the measured noise intensity. These devices are used for non-invasive MRI reconstruction of the human vocal tract during phonation with simultaneous speech recording. In this case, the vibration and noise have negative influence on quality of speech signal. Two basic measurement experiments were performed within the paper: mapping sound pressure levels in the MRI device vicinity and picking up vibration and noise signals in the MRI scanning area. Spectral characteristics of these signals are then analyzed statistically and compared visually and numerically. View Full-Text
Keywords: magnetic resonance imaging; acoustic noise; mechanical vibration magnetic resonance imaging; acoustic noise; mechanical vibration
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Přibil, J.; Přibilová, A.; Frollo, I. Vibration and Noise in Magnetic Resonance Imaging of the Vocal Tract: Differences between Whole-Body and Open-Air Devices. Sensors 2018, 18, 1112.

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