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首页> 外文会议>Optical technologies in biophysics and medicine XV; and Laser physics and photonics XV >The optical origin of the PPG signal
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The optical origin of the PPG signal

机译：PPG信号的光学原点

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PPG volumetric model is frequently adopted to explain the pulsatile nature of optical response for arterial pulsation. In this article we show that the pulsatile fluctuation of optical response can be explained in terms of the light scattering related changes. According to this assumption, these fluctuations are driven by the modulation the scattering coefficient associated with the blood flow hemodynamic effects. There was shown that the proposed model yields a good correspondence with the pulse-oximetry related parameters. Moreover, it was found that the experimental relationship between the red blood concentration in the blood (hematocrit) and the parameters being derived from the in vivo measured optical signals can be described in terms of this scattering driven model. There was demonstrated that the commonly used volumetric assumption fails to provide a reasonable description of the experimental results. The last fact can be used as a decisive argument in favor of the scattering driven model. This model can be used for better understanding of the pulse oximetry as well as for the guidance for the algorithmic development of the blood hemoglobin/ hematocrit in vivo.
机译：PPG体积模型经常被用来解释动脉搏动光响应的搏动性质。在本文中，我们表明可以用与光散射有关的变化来解释光学响应的​​脉动波动。根据该假设，这些波动是由与血流血流动力学效应相关的散射系数的调制驱动的。结果表明，所提出的模型与脉搏血氧仪相关参数产生了很好的对应关系。此外，已经发现，可以根据该散射驱动模型来描述血液中的红血药浓度（血细胞比容）与从体内测量的光信号导出的参数之间的实验关系。事实证明，常用的体积假设无法提供对实验结果的合理描述。最后一个事实可以用作支持散射驱动模型的决定性论据。该模型可用于更好地了解脉搏血氧饱和度，并为体内血红蛋白/血细胞比容的算法开发提供指导。

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