使用对称投影吸引器重建的光电脉冲图节拍检测
Callum Pettit1, Peter H Charlton2, Philip J Aston1
1Department of Mathematics, University of Surrey, Guildford, United Kingdom.
Frontiers in physiology
|March 12, 2024
概括
一种使用对称投射吸引器重建 (SPAR) 的新方法有效地检测出光电血图 (PPG) 信号中的节拍. 这种方法在各种条件下显示出高精度,超过以前的方法.
科学领域:
- 生理学 生理学 生理学
- 动态系统理论 动态系统理论
- 信号处理 信号处理
背景情况:
- 光电缩图 (PPG) 信号被广泛用于生理监测.
- 在PPG中精确的节拍检测对于可靠的健康评估至关重要.
- 现有的节拍检测算法面临信号变化和噪声的挑战.
研究的目的:
- 为PPG信号引入一种新的节拍检测方法.
- 评估在不同生理状态中提出的方法的性能.
- 将新方法与现有的节拍检测算法进行比较.
主要方法:
- 从PPG信号中生成一个二维相位空间吸引器,使用对称投射吸引器重建 (SPAR).
- 通过节奏检测的相位空间的原点定义一个Poincaré截面.
- 优化Poincaré部分以考虑基线漂移.
- 使用WESAD数据集进行验证,包括基线,压力,娱乐和冥想条件.
主要成果:
- 获得的F1中位数得分:74.3% (基线),63.0% (压力),93.6% (娱乐),97.7% (冥想).
- 与早期版本相比,SPAR方法显示出更高的性能.
- 该方法的性能与基准研究中的顶级算法相当.
- 与其他两种方法相比,对于休息的受试者来说,节拍间隔测量的精度提高了.
结论:
- 在PPG信号中,SPAR方法提供了一种强大而准确的方法来检测节拍.
- 该方法显示了在各种生理监测场景中应用的巨大潜力.
- SPAR为现有的节拍检测算法提供了有竞争力的替代方案,特别是在具有挑战性的条件下.
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