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首页> 外文期刊>JSME International Journal. Series C, Mechanical Systems, Machine Elements and Manufacturing >Vibration Isolation for Seismocardiogram Measurement in the OpenMRI-Guided Operating Theater
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Vibration Isolation for Seismocardiogram Measurement in the OpenMRI-Guided Operating Theater

机译：OpenMRI指导的手术室中用于心电图测量的振动隔离

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摘要

The purpose 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 was examined by analyzing the gantry vibration during MRI scanning and the SCG of a healthy volunteer. The MRI gantry vibration had maximum amplitude of 2.5 m/s~2, which are several peaks more than 100 Hz up to 500 Hz. Up to 94% reduction in amplitude was observed in the patient bed vibration under both T1-weighted and T2-weighted sequences. The power spectrum center of the patient bed vibration was more than 30 Hz. The maximum amplitude of SCG was 0.92 m/s~2 and a FFT analysis revealed that the SCG was not higher than 25 Hz. The signal-to-noise ratio between the SCG and the patient bed vibration was calculated to be from 4 to 7. These results demonstrate that the peak acceleration of the SCG can be monitored during openMRI scanning. In conclusion, vibration analysis showed the feasibility of using the piezoelectric acceleration sensor for seismocardiogram measurement in the openMRI-guided operating theater.
机译：这项研究的目的是建立一种精确测量躺在开放式磁共振成像（openMRI）机器中以在手术过程中监测心肌缺血的患者的地震心动图（SCG）的方法。通过分析健康志愿者的MRI扫描和SCG中的机架振动来检查振动隔离。 MRI龙门架振动的最大振幅为2.5 m / s〜2，是超过100 Hz至500 Hz的几个峰值。在T1加权和T2加权序列下，患者病床振动的幅度均降低了94％。病床振动的功率谱中心超过30 Hz。 SCG的最大振幅为0.92 m / s〜2，FFT分析表明SCG不高于25 Hz。计算得出SCG与患者床振动之间的信噪比为4到7。这些结果表明，可以在openMRI扫描期间监视SCG的峰值加速度。总之，振动分析表明在openMRI引导的手术室中使用压电加速度传感器进行心电图测量的可行性。

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