Damper design for improving S/N ratio of the seismocardiogram monitoring in the openMRI-guided operating theater

K. Naemura*, H. Iseki

*この研究の対応する著者

    研究成果: Conference article査読

    1 被引用数 (Scopus)

    抄録

    The final goal of this study is to establish a method of measuring precisely the seismocardiogram (SCG) of a patient who lying in an open magnetic resonance imaging (openMRI) machine for myocardial ischemia monitoring during surgery. Vibration isolation from the gantry vibration during MRI scan is essential for clinical use. Authors previously reported the comparison between the SCG and the gantry vibration. A damper to decrease vibration below 30 Hz should be designed. In this paper, authors fabricated a damper model to check the feasibility of the damping effect, and compared with the patient bed mat. Experiment using a vibrator showed 1) the viscosity damping coefficient of the current damper was 2 kN s/m, 2) owing to the damper, peak ratio between input and output amplitude decreased from 2.5 to 1.2, and 3) natural frequency decreased from 12 Hz to S Hz. Damping below 30 Hz was successfully achieved. The maximum S/N ratio was calculated 6, improving from 1.8. Simulation showed that the maximum S/N would be 75 under the viscosity damping coefficient of 1 N s/m.

    本文言語English
    ページ(範囲)3428-3431
    ページ数4
    ジャーナルAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
    26 V
    出版ステータスPublished - 2004
    イベントConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States
    継続期間: 2004 9月 12004 9月 5

    ASJC Scopus subject areas

    • 信号処理
    • 生体医工学
    • コンピュータ ビジョンおよびパターン認識
    • 健康情報学

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