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首页> 外文会议>International Conference on Vibration Measurements by Laser and Noncontact Techniques >Fluid pulsation detection in presence of induced motion artifacts using speckle techniques
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Fluid pulsation detection in presence of induced motion artifacts using speckle techniques

机译：使用散斑技术存在诱导运动伪影的流体脉动检测

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The importance of regular health monitoring has led to a large variety of medical products being available in the market. Motion artifact is still a limitation in portable optical devices which can provide accurate results. We will address the possibility of measuring a pulsatile flow in a noisy environment using an approach based on speckle dynamics. In specific case we measure pulsation or the heart rate in presence of motion between the illumination and the in-vitro or in-vivo sample. The main motion induced artifact in the signal being measured arises from changing the light penetration depth at various positions being illuminated. These measurements have been compared for different settings and multiple-exposure time of the camera. We compare the result for each measurement based on two techniques of speckle contrast and correlation. Under several parameters of the measurement, different analysis techniques were successful but in general correlation approach shows to be more robust for larger motion induced artifacts. Shorter exposure times provide a more detailed spectrum and more successful for extracting the signal from the induced motion artifact, in case of correlation analysis. The in-vivo measurement results agreed fairly with in-vitro case.
机译：常规健康监测的重要性导致市场上提供的各种医疗产品。运动伪影仍然是便携式光学设备的限制，其可以提供准确的结果。我们将解决使用基于散斑动态的方法测量嘈杂环境中的脉动流动的可能性。在特定情况下，我们测量在照明和体外或体内样品之间的运动存在下的脉动或心率。正在测量的信号中的主运动引起的伪影产生从改变照射的各个位置的光穿透深度。将这些测量进行了比较，以便不同的设置和相机的多曝光时间。基于两种散斑对比度和相关性的两种技术，我们比较每个测量结果。在测量的几个参数下，不同的分析技术是成功的，但是在一般相关方法中，对于较大的运动诱导的伪像表示更加稳健。更短的曝光时间提供更详细的频谱和更成功的是，在相关分析的情况下，用于从诱导的运动伪影中提取信号。体内测量结果公平地与体外情况相同。

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