Acoustic Noise Analysis of Echo Planar Imaging : Multi-center Trial and Comparison with Other Pulse Sequences

• MIYATI TOSHIAKI

  Central Department of Radiology, Nagoya City University Hospital

• NARITA HIROYUKI

  Central Block of Radiology, Nagoya University Hospital:(Present address)Department of Radiology, Hamamatsu University Hospital

• AKAIWA NORITAKE

  Department of Radiology, Komaki City Hospital

• ISHIHARA SHIGERU

  Department of Radiology, Moriyama Municipal Hospital

• KASAI HARUMASA

  Central Department of Radiology, Nagoya City University Hospital

• SAKURAI HISAYUKI

  Department of Radiology, Jouhoku Municipal Hospital

• SAKURAI YASUO

  Central Block of Radiology, Nagoya University Hospital

• NISHIGAKI FUMIMASA

  Department of Radiology, Chubu Industrial Injury Hospital

• YAMAUCHI TOSHIYUKI

  Department of Radiology, Nagoya Posts and Telecommunications Hospital

Bibliographic Information

Other Title

• MRI装置の騒音 : EPIシーケンスを中心とした施設間およびパルスシーケンス間における検討

Abstract

The purpose of this study was to evaluate acoustic noise in echo plannar imaging(EPI) at various magnetic resonance imaging(MRI) centers, and to compare EPI acoustic noise with that in other principal pulse sequences. We measured the maximum clinical acoustic noise[A-weighted root-mean-square sound pressure levels(Leq)and peak impulse sound pressure levels(Lpeak)]for FPI under the same conditions in five clinical superconducting MRI systems(0.5-1.5T). We also compared the sound pressure levels for EPI and nine different pulse sequences, and analyzed the acoustic noise spectra. There was no signification difference between acoustic noise levels in EPI and other pulse sequences, and these values were within Occupational Safety and Health Administration guidelines at all centers. However, of all the pulse sequences, EPI has the greatest proportion of high-frequency acoustic noise(>1,000 Hz). Single-shot EPI was subject to higher-pitched noise than multi-shot EPI. Even among centers using the same magnet and gradient coil systems, there was considerable difference in acoustic noise levels(maximum differences in Leq and Lpeak were 7.0 dBA and 7.7 dB, respectively).

Journal

• Japanese Journal of Radiological Technology

  Japanese Journal of Radiological Technology 54 (10), 1216-1225, 1998

  Japanese Society of Radiological Technology

Keywords

• Magnetic resonance(MR)
• Health physics
• Safety
• Acoustic noise
• Echo-planar imaging(EPI)

Details

• CRID: 1390001206384029824
• NII Article ID: 110003434878
• NII Book ID: AN00197784
• DOI: 10.6009/jjrt.kj00001351911
• ISSN: 18814883
• ISSN: 03694305
• Web Site: https://www.jstage.jst.go.jp/article/jjrt/54/10/54_KJ00001351911/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/1999066906
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed