Relationship between airflow and normal lung sounds

被引:10
作者
Hossain, I [1 ]
Moussavi, Z [1 ]
机构
[1] Univ Manitoba, Dept Elect & Comp Engn, Winnipeg, MB R3T 2N2, Canada
来源
IEEE CCEC 2002: CANADIAN CONFERENCE ON ELECTRCIAL AND COMPUTER ENGINEERING, VOLS 1-3, CONFERENCE PROCEEDINGS | 2002年
关键词
lung sound signal; airflow; spectral power;
D O I
10.1109/CCECE.2002.1013104
中图分类号
TP18 [人工智能理论];
学科分类号
081104 [模式识别与智能系统]; 0812 [计算机科学与技术]; 0835 [软件工程]; 1405 [智能科学与技术];
摘要
The relationship between airflow and respiratory sounds has always been of particular Interest for diagnostic purposes. In this paper we investigated the relationship between airflow and lung sounds. Respiratory lung sound signals with the corresponding airflow signals from ten healthy subjects were studied. The lung sounds and the corresponding airflow signals were sequested to 100 ms segments with 50% overlap between successive segments. The mean lung sound amplitude (meanAMP) of the time signal as well as the average power (P-avg) of the sounds between 100 - 300 Hz and the corresponding mean airflow were calculated for each segment. The following five models were studied: linear relationship between meanAMP and flow (model 1), linear relationship between meanAMP and flow(2) (model 2), linear relationship between P-avg and flow (model 3), linear relationship between log(P-avg) and flow (model 4) and linear relationship between log(P-avg) and log(flow) (model 5). Linear regression analysis was used to investigate these relationships using the upper 15% of flow signal in each inspiration and the correspoding meanAMP and P-avg. The correlation coefficient (r) between the model variables for each subject in each model was calculated. Also the RMS error between the regression line and the actual data for each model was averaged among the subjects. The results showed that the experimental data fits the model 3 very well. Therefore, we suggested a linear relationship between P-avg and flow: P-avg = a * flow + b. This model can be chosen to estimate airflow from the average power of lung sounds.
引用
收藏
页码:1120 / 1122
页数:3
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