Active Noise Control System for Reducing MR Noise

Masafumi KUMAMOTO; Masahiro KIDA; Ryotaro HIRAYAMA; Yoshinobu KAJIKAWA; Toru TANI; Yoshimasa KURUMI

doi:10.1587/transfun.E94.A.1479

Active Noise Control System for Reducing MR Noise

Masafumi KUMAMOTO, Masahiro KIDA, Ryotaro HIRAYAMA, Yoshinobu KAJIKAWA, Toru TANI, Yoshimasa KURUMI

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We propose an active noise control (ANC) system for reducing periodic noise generated in a high magnetic field such as noise generated from magnetic resonance imaging (MRI) devices (MR noise). The proposed ANC system utilizes optical microphones and piezoelectric loudspeakers, because specific acoustic equipment is required to overcome the high-field problem, and consists of a head-mounted structure to control noise near the user's ears and to compensate for the low output of the piezoelectric loudspeaker. Moreover, internal model control (IMC)-based feedback ANC is employed because the MR noise includes some periodic components and is predictable. Our experimental results demonstrate that the proposed ANC system (head-mounted structure) can significantly reduce MR noise by approximately 30 dB in a high field in an actual MRI room even if the imaging mode changes frequently.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E94-A No.7 pp.1479-1486

Publication Date: 2011/07/01

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Online ISSN: 1745-1337

DOI: 10.1587/transfun.E94.A.1479

Type of Manuscript: PAPER

Category: Engineering Acoustics

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Masafumi KUMAMOTO, Masahiro KIDA, Ryotaro HIRAYAMA, Yoshinobu KAJIKAWA, Toru TANI, Yoshimasa KURUMI, "Active Noise Control System for Reducing MR Noise" in IEICE TRANSACTIONS on Fundamentals, vol. E94-A, no. 7, pp. 1479-1486, July 2011, doi: 10.1587/transfun.E94.A.1479.
Abstract: We propose an active noise control (ANC) system for reducing periodic noise generated in a high magnetic field such as noise generated from magnetic resonance imaging (MRI) devices (MR noise). The proposed ANC system utilizes optical microphones and piezoelectric loudspeakers, because specific acoustic equipment is required to overcome the high-field problem, and consists of a head-mounted structure to control noise near the user's ears and to compensate for the low output of the piezoelectric loudspeaker. Moreover, internal model control (IMC)-based feedback ANC is employed because the MR noise includes some periodic components and is predictable. Our experimental results demonstrate that the proposed ANC system (head-mounted structure) can significantly reduce MR noise by approximately 30 dB in a high field in an actual MRI room even if the imaging mode changes frequently.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1587/transfun.E94.A.1479/_p

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@ARTICLE{e94-a_7_1479,
author={Masafumi KUMAMOTO, Masahiro KIDA, Ryotaro HIRAYAMA, Yoshinobu KAJIKAWA, Toru TANI, Yoshimasa KURUMI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Active Noise Control System for Reducing MR Noise},
year={2011},
volume={E94-A},
number={7},
pages={1479-1486},
abstract={We propose an active noise control (ANC) system for reducing periodic noise generated in a high magnetic field such as noise generated from magnetic resonance imaging (MRI) devices (MR noise). The proposed ANC system utilizes optical microphones and piezoelectric loudspeakers, because specific acoustic equipment is required to overcome the high-field problem, and consists of a head-mounted structure to control noise near the user's ears and to compensate for the low output of the piezoelectric loudspeaker. Moreover, internal model control (IMC)-based feedback ANC is employed because the MR noise includes some periodic components and is predictable. Our experimental results demonstrate that the proposed ANC system (head-mounted structure) can significantly reduce MR noise by approximately 30 dB in a high field in an actual MRI room even if the imaging mode changes frequently.},
keywords={},
doi={10.1587/transfun.E94.A.1479},
ISSN={1745-1337},
month={July},}

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TY - JOUR
TI - Active Noise Control System for Reducing MR Noise
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1479
EP - 1486
AU - Masafumi KUMAMOTO
AU - Masahiro KIDA
AU - Ryotaro HIRAYAMA
AU - Yoshinobu KAJIKAWA
AU - Toru TANI
AU - Yoshimasa KURUMI
PY - 2011
DO - 10.1587/transfun.E94.A.1479
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E94-A
IS - 7
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - July 2011
AB - We propose an active noise control (ANC) system for reducing periodic noise generated in a high magnetic field such as noise generated from magnetic resonance imaging (MRI) devices (MR noise). The proposed ANC system utilizes optical microphones and piezoelectric loudspeakers, because specific acoustic equipment is required to overcome the high-field problem, and consists of a head-mounted structure to control noise near the user's ears and to compensate for the low output of the piezoelectric loudspeaker. Moreover, internal model control (IMC)-based feedback ANC is employed because the MR noise includes some periodic components and is predictable. Our experimental results demonstrate that the proposed ANC system (head-mounted structure) can significantly reduce MR noise by approximately 30 dB in a high field in an actual MRI room even if the imaging mode changes frequently.
ER -