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通过主动取消反射干扰来实现准确的非接触式光电脉冲扫描

Yonggang Tong, Zhipei Huang, Feng Qiu

IEEE journal of biomedical and health informatics

|August 15, 2024

概括

这项研究引入了一种新的调制光方法,以改善非接触式脉冲波测量. 它显著减少干扰,提高信号质量,以准确检测动脉脉冲.

科学领域:

生物医学光学生物医学光学
医疗成像医学成像
生理监测生理监测

背景情况:

影像光电显微镜 (IPPG) 提供非接触式脉冲波测量.
皮肤表面的镜面反射会导致显著的干扰,降低信号质量 (低SINR).
现有的照明方法很难将脉冲信号与表面反射隔离.

研究的目的:

为准确的动脉脉冲波测量提出一种新的调制照明方法.
为了将脉冲波信息从IPPG中的表面反射干扰中分离出来.
为了增强无接触IPPG中的信号与干扰加噪声比 (SINR).

主要方法:

开发了一种基于皮肤反射模型的新型调制照明技术.
设计了特定的调制模式,以区分表面和地下反射.
实施了一种方法来隔离含有脉冲波数据的扩散反射.

主要成果:

提出的方法成功地将表面反射与地下扩散反射分开.
与环境和恒定照明相比,在SINR方面取得了显著的改进.
在环境照明下SINR提高了4.56dB,在恒定补充照明下提高了3.74dB.

结论:

新的调制照明方法有效地隔离了动脉脉冲波信息.
这种方法通过减轻光谱反射干扰来提高IPPG的准确性.
该技术为可靠的非接触生理监测提供了一个有希望的解决方案.

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