Effect of an active noise control system on acoustical noise during magnetic resonance imaging diagnosis

Shohei Nakayama, Kenji Muto, Yagi Kazuo, Guoyue Chen

研究成果: Conference contribution

2 引用 (Scopus)

抜粋

A magnetic resonance imaging (MRI) equipment generates loud sounds during its operation. The sound pressure level depends on the imaging sequences but is generally around 100 dB. This makes patients uncomfortable, and temporary hearing loss is possible if ear protection to decrease the sound pressure level by 20 dB is not used. This situation is so discomforting to the patient that in some cases MRI diagnosis and treatment may be refused. We studied ear protectors with an active noise control (ANC) system. Traditional protectors can decrease sound pressure level for high frequencies, but ANC systems can control low-frequency sounds as well. This study considers improvements to the acoustical environment when using ANC systems for MRI patients. The ANC system we developed is a feedforward system because MRI acoustical noise is unsteady and pulsed. The system uses nonmagnetic devices, ear protectors, and optical microphones because MRI rooms are highly magnetic environments. A computer simulation showed that the transition of the level of MRI acoustical noise was controlled by the ANC system during a diagnosis. As a result, the system reduced the MRI acoustical noise from 110 dB to 70 dB and was capable of changing the imaging sequences during MRI operation. Copyright

元の言語English
ホスト出版物のタイトル42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013
ホスト出版物のサブタイトルNoise Control for Quality of Life
出版者OAL-Osterreichischer Arbeitsring fur Larmbekampfung
ページ3603-3608
ページ数6
ISBN(印刷物)9781632662675
出版物ステータスPublished - 2013 1 1
イベント42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013 - Innsbruck, Austria
継続期間: 2013 9 152013 9 18

出版物シリーズ

名前42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life
5

Conference

Conference42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013
Austria
Innsbruck
期間13/9/1513/9/18

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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  • これを引用

    Nakayama, S., Muto, K., Kazuo, Y., & Chen, G. (2013). Effect of an active noise control system on acoustical noise during magnetic resonance imaging diagnosis. : 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life (pp. 3603-3608). (42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life; 巻数 5). OAL-Osterreichischer Arbeitsring fur Larmbekampfung.