Artifact reduction in photoplethysmography
Artifact reduction in photoplethysmography
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DOI：
10.1364/ao.37.007437
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发表时间：
1998-11-01
期刊：
影响因子：
1.9
通讯作者：
Smith, PR
中科院分区：
文献类型：
--
作者：
Hayes, MJ;Smith, PR
光电体积描记术中的运动伪影减少，因此在脉搏血氧仪中的含义，是实现了一种新的非线性方法。光电体积描记信号的物理起源进行了探讨，在所观察到的强度波动的非线性测量。它表明，非线性重整化接收到的脉动与光学信息的方式，有助于物理解释。一个启发式的物理模型的运动伪影的介绍和实验证明，与逆伪影减少被简化的非线性。一个实际的实施技术进行了讨论，重点放在所产生的信号的静态和动态部分的重新密封。应注意，此实施方案还具有减少任何残余环境伪影的所要效果。这种方法的范围和权力进行了调查，从一个实际的电子系统的结果介绍。(C)1998年美国光学学会OCIS代码：070.6020、100.0100。
Motion artifact reduction in photoplethysmography, and therefore by implication in pulse oximetry, is achieved with a novel nonlinear methodology. The physical origins of the photoplethysmographic signals are explored in relation to a nonlinear measure of the observed intensity fluctuations. It is demonstrated that the nonlinearity renormalizes the received pulsations with optical information in a manner that aids physical interpretation. A heuristic physical model for the motion artifact is introduced and experimentally justified, with an inversion for artifact reduction being simplified by the nonlinearity. A practical implementation technique is discussed with emphasis placed on the resultant resealing of the static and the dynamic portions of the signals. It is noted that this implementation also has the desirable effect of reducing any residual ambient artifact. The scope and power of this methodology is investigated with the presentation of results from a practical electronic system. (C) 1998 Optical Society of America OCIS codes: 070.6020, 100.0100.