传感器配置和黑色素度对使用蒙特卡洛模拟的反射脉冲氧度学的影响
Maximilian Reiser1,2, Andreas Breidenassel3, Oliver Amft4,5
1Faculty of Electrical Engineering Landshut, HAW Landshut, Landshut, Germany. maximilian.reiser@haw-landshut.de.
Scientific reports
|November 10, 2025
概括
这项研究使用蒙特卡洛模拟来优化光聚缩学 (PPG) 传感器配置,以在不同度的黑色素中准确测量血液中氧和度. 在0°的VCSEL光束配置为PI和氧和估计提供了最佳平衡.
科学领域:
- 生物医学光学 生物医学光学
- 生理测量生理测量
- 医疗成像医学成像
背景情况:
- 精确的血氧和度 (SpO2) 测量对于患者监测至关重要.
- 黑色素度和光聚缩学 (PPG) 传感器配置显著影响SpO2估计的准确性.
- 优化传感器参数对于可靠的脉冲氧计是必不可少的,特别是在不同的肤色.
研究的目的:
- 研究黑色素度和PPG传感器配置对信号质量和SpO2估计准确性的影响.
- 为了确定最佳的红色和红外波长,光束配置和冲击角度,以提高脉冲氧度学性能.
- 为了确定平衡透指数 (PI) 和SpO2估计错误的最佳传感器配置.
主要方法:
- 使用蒙特卡洛 (MC) 模拟来建模光子-皮肤相互作用.
- 模拟的SpO2从70%到100%以及黑色素度从2.5%到30.5%.
- 分析了波长 (624-940nm),光束形状 (LED,VCSEL),冲击角度 (0°,±45°) 和源探测器距离 (2-9mm) 对PI,反射SpO2和SNR的影响.
主要成果:
- 在624nm (红色) 和940nm (红外线) 观察到的最大 perfusion 指数 (PI).
- 反射脉冲氧计在660nm和850nm时产生了更准确的SpO2结果,无论波长组合如何.
- 在0°入射角度的VCSEL光束配置表现出最佳性能,平衡PI和SpO2估计误差.
结论:
- 建议在0°的VCSEL光束配置为各种脉冲氧度应用的最佳光源.
- 传感器配置,包括波长和光束配置,极大地影响PPG信号质量和SpO2准确性.
- 进一步优化PPG传感器设计可以提高诊断可靠性在各种人群.
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