Measurement of equivalent continuous A-weighted sound pressure level of driving sound of three tesla MRI equipment

Masataka Chikai, Yasuhiro Shimono, Kenji Muto, Hideo Shibayama, Kazuo Yagi, Toshiyuki Onodera

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Magnetic resonance imaging (MRI) equipment is important in medical diagnosis. The equipment utilizes a technology of tomography by the nuclear magnetic resonance phenomenon for imaging. Driving sound of MRI equipment is loud and it is caused by using the gradient magnetic field controlled by imaging sequence. It generates loud sound which depends on imaging sequence. The sound pressure level of the driving sound is over 100 dB sometimes and it makes the ear-protector necessary. There are some researches of the driving sound. In this paper, this paper shows the measurement result of equivalent continuous A-weighted sound pressure level of distribution in the three tesla MRI equipment which is Philip Achieva 3.0T X-series. Number of measurement point is 21 on the table; the 15 points located inside of the bore and the 6 points located outside of the bore. Imaging sequences of the measurement sound are slice positioning, T2 weighted imaging (T2W) and Echo planar imaging (EPI). The measurement data length is 30.04 seconds. The result showed that the driving sound of each imaging sequences on the table was loud. The maximum equivalent continuous A-weighted sound pressure level (LAeq) of slice positioning, T2W and EPI were 114.7 dB, 106.0 dB, 114.3 dB respectively. These values were larger than driving sound of 1.5 tesla MRI equipment. The maximum value of instantaneous sound pressure was 123.9 dB in the three sequences of the 3 tesla MRI equipment. So, it shows the instantaneous value is important parameter.

本文言語English
ホスト出版物のタイトル20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
ページ2716-2719
ページ数4
出版ステータスPublished - 2010 12 1
イベント20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society - Sydney, NSW, Australia
継続期間: 2010 8 232010 8 27

出版物シリーズ

名前20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
4

Conference

Conference20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society
国/地域Australia
CitySydney, NSW
Period10/8/2310/8/27

ASJC Scopus subject areas

  • 音響学および超音波学

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