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| 基于莫尔条纹技术的连续帧照相法获取桡动脉脉搏波 |
| Continuous frame photography method based on Moire fringe technique for obtaining radial pulse waves |
| 投稿时间：2024-01-07 |
| DOI：10.3969/j.issn.1005-5630.202401070002 |
| 中文关键词: 生物医学光学 莫尔条纹 连续帧拍照 脉搏波 特征点 变分模态分解 |
| 英文关键词:biomedical optics Moire fringe continuous frame imaging pulse wave feature point variational mode decomposition |
| 基金项目:国家自然科学基金青年科学基金（52206102） |
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| 摘要点击次数: 132 |
| 全文下载次数: 234 |
| 中文摘要: |
| 脉搏是人体重要生理参数之一，通过非接触方式获取脉搏波具有重要的临床应用价值。提出在LED光源照射下，通过莫尔条纹技术放大桡动脉皮肤表面振动的原始信号，采用连续帧方式拍摄桡动脉搏动来获取脉搏波的方法。实验中，在LED光源照明下，在桡动脉皮肤表面粘贴一片带有条纹的薄膜，与放置在距桡动脉2～3 cm处的另一组条纹形成莫尔条纹。使用工业相机，用连续帧方式拍摄由桡动脉搏动引起的莫尔条纹周期性移动变化的图像序列。选取感兴趣区域提取脉搏搏动原始信号，使用带通滤波和变分模态分解对信号进行滤波处理，最终获得保留搏动特征细节的脉搏波。测量了多名受试者的脉搏波信号，结果显示，该方法可以获得保留多数主波、潮波和重搏波等多个特征的完整脉搏波信号。所提出的方法对非接触式获取人体脉搏波的操作具有很好的参考价值。 |
| 英文摘要: |
| The pulse is one of the important human physiological parameters, and the non-contact acquisition of pulse waves holds significant clinical application value. This paper proposes a method for amplifying the original vibration signal of the radial artery skin surface using Moire fringe technology under LED light, enabling the detection of pulse waves by recording the pulsation of the radial artery through continuous frame imaging. In the experiment, a striped thin film was adhered to the surface of the radial artery, and another set of stripes was placed 2～3 cm away from the artery formed Moire fringes under LED illumination. An industrial camera was used to continuously capture a sequence of images showing the periodic movement of the Moire fringes caused by radial artery pulsation. A region of interest was selected to extract the original pulse signal, which was then filtered using bandpass filtering and variational mode decomposition to obtain a pulse wave that preserved the detailed characteristics of the pulse. The results of measuring the pulse wave signals from multiple subjects demonstrate that this method can acquire complete pulse wave signals, retaining various features such as the primary wave, tidal wave, and dicrotic wave. The proposed method offers valuable reference for the non-contact acquisition of human pulse waves. |
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