利用非线性数字滤波器从肺泡音中分离出细湿啰音。

Separation of fine crackles from vesicular sounds by a nonlinear digital filter.

作者信息

Ono M, Arakawa K, Mori M, Sugimoto T, Harashima H

出版信息

IEEE Trans Biomed Eng. 1989 Feb;36(2):286-91. doi: 10.1109/10.16477.

Abstract

Crackles are discontinuous adventitious sounds, and their separation is an important process in the analysis of lung sounds. In order to separate the crackles from vesicular sounds automatically, we used a nonlinear digital filter which was designed to separate nonstationary from stationary signals. We applied this filter to the lung sounds recorded from six patients with pulmonary fibrosis. The separation was satisfactory enough to make this method useful in clinical medicine.

摘要

湿啰音是间断性附加音，对其进行分离是肺音分析中的一个重要过程。为了自动将湿啰音与肺泡呼吸音分离，我们使用了一种非线性数字滤波器，该滤波器旨在将非平稳信号与平稳信号分离。我们将此滤波器应用于6例肺纤维化患者记录的肺音。分离效果令人满意，足以使该方法在临床医学中发挥作用。