《计算机应用》唯一官方网站 ›› 2020, Vol. 40 ›› Issue (2): 608-615.DOI: 10.11772/j.issn.1001-9081.2019071172

• 应用前沿、交叉与综合 • 上一篇    下一篇

基于统计特征和熵特征融合的心肌梗死辅助诊断方法

王治忠1, 钱龙龙1, 韩闯1, 师丽2()   

  1. 1.郑州大学 电气工程学院,郑州 450000
    2.清华大学 自动化系,北京 100000
  • 收稿日期:2019-07-08 修回日期:2019-08-17 接受日期:2019-08-27 发布日期:2019-09-11 出版日期:2020-02-10
  • 通讯作者: 师丽
  • 作者简介:王治忠(1982—),男,山东蓬莱人,副教授,博士,主要研究方向:生物信号检测与处理
    钱龙龙(1993—),男,河南周口人,硕士研究生,主要研究方向:心电信号分析、智能诊断
    韩闯(1991-),男,河南驻马店人,博士研究生,主要研究方向:心电信号分析、智能诊断;
  • 基金资助:
    国家自然科学基金资助项目(61673353);国家自然科学基金青年科学基金资助项目(61603344);河南省高等教育重点研究项目(15A120017)

Auxiliary diagnosis method of myocardial infarction based on fusion of statistical features and entropy features

Zhizhong WANG1, Longlong QIAN1, Chuang HAN1, Li SHI2()   

  1. 1.College of Electrical Engineering,Zhengzhou University,Zhengzhou Henan 450000,China
    2.Department of Automation,Tsinghua University,Beijing 100000,China
  • Received:2019-07-08 Revised:2019-08-17 Accepted:2019-08-27 Online:2019-09-11 Published:2020-02-10
  • Contact: Li SHI
  • About author:WANG Zhizhong, born in 1982, Ph. D., associate professor. His research interests include biological signal detection and processing.
    QIAN Longlong, born in 1993, M. S. candidate. His research interests include ECG signal analysis, intelligent diagnosis.
    HAN Chuang, born in 1991, Ph. D. candidate. His research interests include ECG signal analysis, intelligent diagnosis.
  • Supported by:
    the National Natural Science Foundation of China(61673353);the National Natural Science Foundation of China Young Scientists(61603344);the Henan Province Higher Education Key Research Project(15A120017)

摘要:

针对心肌梗死临床诊断过程中临床实用性和准确率不高的问题,提出一种基于12导联心电图(ECG)的心肌梗死的辅助诊断方法。首先,对12导联ECG信号进行去噪和数据增强处理;其次,分别对各导联ECG信号提取包含标准差、峰度系数、偏度系数的统计特征,以此反映信号的形态特征;同时,提取包含香农熵、样本熵、模糊熵、近似熵和排列熵的熵特征,以此表征ECG信号时间序列的时间与频谱复杂性、新模式产生的概率、规律性和不可预测性以及检测ECG信号的微小变化;然后,融合ECG信号的统计特征和熵特征;最后,基于随机森林算法在病人内和病人间两种模式下对算法进行分析和验证,并通过交叉验证防止过拟合。实验结果表明,病人内模式下算法准确率和F1值分别为99.98%和99.99%,病人间模式下算法准确率和F1值分别为94.56%和97.05%;与基于单导联ECG的诊断方法相比,采用12导联ECG诊断心肌梗死更符合医生临床诊断逻辑。

关键词: 心肌梗死, 统计特征, 熵特征, 随机森林算法, 交叉验证, 12导联心电图

Abstract:

Aiming at the problem of low clinical practicability and accuracy in the clinical diagnosis of myocardial infarction, an auxiliary diagnosis method of myocardial infarction based on 12-lead ElectroCardioGram (ECG) signal was proposed. Firstly, denoising and data enhancement were performed on the 12-lead ECG signals. Secondly, aiming at the ECG signals of each lead, the statistical features including standard deviation, kurtosis coefficient and skewness coefficient were extracted respectively to reflect the morphological characteristics of ECG signals, meanwhile the entropy features including Shannon entropy, sample entropy, fuzzy entropy, approximate entropy and permutation entropy were extracted to characterize the time and frequency spectrum complexity, the new mode generation probability, the regularity and the unpredictability of the ECG signal time series as well as detect the small changes of ECG signals. Thirdly, the statistical features and entropy features of ECG signals were fused. Finally, based on the random forest algorithm, the performance of algorithm was analyzed and verified in both intra-patient and inter-patient modes, and the cross-validation technology was used to avoid over-fitting. Experimental results show that, the accuracy and F1 value of the proposed method in the intra-patient modes are 99.98% and 99.99% respectively, the accuracy and F1 value of the proposed method in the inter-patient mode are 94.56% and 97.05% respectively; and compared with the detection method based on single-lead ECG, the detection of myocardial infarction with 12-lead ECG is more logical for doctors’ clinical diagnosis.

Key words: myocardial infarction, statistical feature, entropy feature, random forest algorithm, cross-validation, 12-lead ElectroCardioGram (ECG)

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