北京生物醫(yī)學(xué)工程

心音信號(hào)分段規(guī)則的探討

Discussion on the segmentation rules for heart sound signals

作者：吳玉春楊亞萍鄧北川

單位：                      西安航空學(xué)院（西安710077）        

關(guān)鍵詞：心音信號(hào)；分段；自動(dòng)識(shí)別

分類號(hào)：

出版年·卷·期（頁碼）：2014·33·5（524-526）

摘要：

目的如何有效提取心音信號(hào)的有效成分(第一心音S1、第二心音S2)是分析心音信號(hào)的關(guān)鍵。為提取心音信號(hào)的有效成分，必須明確心音信號(hào)的分段規(guī)則。方法首先對(duì)目前心音研究領(lǐng)域中常用的兩類心音分段方法進(jìn)行分析和比較。根據(jù)現(xiàn)有文獻(xiàn)資料，結(jié)合作者對(duì)實(shí)際采集的829例心音實(shí)例的研究，提取心音的各時(shí)域特征并進(jìn)行統(tǒng)計(jì)分析，最后對(duì)心音信號(hào)分段規(guī)則進(jìn)行了探討。結(jié)果心音信號(hào)的S1、S2及收縮期、舒張期等時(shí)域特征呈現(xiàn)一定規(guī)律性。結(jié)論可按照上述時(shí)域特征對(duì)心音信號(hào)進(jìn)行自動(dòng)分段，并借助心音分段規(guī)則進(jìn)行進(jìn)一步識(shí)別和分析。

Objective The key point of analyzing heart sound signal is how to extract the first heart sound and the second heart sound (S1, S2). In order to extract the active ingredients of heart sound signals, segmentation rules must be clear. Methods Firstly, Two methods of heart sound segmentation are analyzed and compared. By studying some document literature and 829 heart sound samples collected by the authors, we extract heart sounds’ time domain features and do some statistical analysis. Finally, we discuss the segmentation rules for heart sound signals. Results S1, S2, systolic, diastolic and other time-domain characteristics of heart sound signals show certain regularity. Conclusions Time domain characteristics can be used to automatically segment heart sound signals, and the segmentation rules for heart sound are helpful to further identify and analyze the signals.

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