Rale detection method and device

Abstract

The invention relates to a rale detection method and device. In one embodiment, the method includes the steps that a to-be-detected lung sound signal is received and subjected to filtering processing so that a filtered signal can be output; time frequency conversion is performed on the filtered signal, a time frequency signal is obtained, the signal is subjected to integral along the frequency axis so that a time edge signal can be obtained, and the signal is subjected to integral along the time axis so that a frequency edge signal can be obtained; a first characteristic value of the to-be-detected lung sound signal is obtained according to the frequency edge signal, and a second characteristic value and/or a third characteristic value of the to-be-detected lung sound signal is obtained according to the time edge signal; two or more of the first characteristic value, the second characteristic value and the third characteristic value are utilized for constructing a characteristic vector of the to-be-detected lung sound signal, and the characteristic vector is sent into a trained classifier to be recognized, and a recognition result is output. According to the rale detection method and device, the lung sound signal is used for training the classifier, the classifier is used for recognizing the to-be-detected lung sound, the real-time detection efficiency is improved, meanwhile, the calculation amount is reduced, and good application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of biomedical signal processing, in particular to a rale detection method and device. Background technique [0002] Respiratory diseases are common diseases such as asthma, chronic obstructive pulmonary disease (COPD), pneumonia, bronchitis, etc. In recent years, with air pollution and other environmental factors, the prevalence of respiratory diseases has continued to increase, and the diagnosis of lung diseases has received more attention. Pulmonary breath sounds contain a lot of information and are an important indicator reflecting the physiology and pathology of the lung. Among them, rale is a common abnormal lung sound, which is closely related to diseases such as pneumonia. At present, the diagnosis of rales in clinical medicine mainly relies on auscultation, which largely depends on the doctor's auscultation technique and clinical experience, and is highly subjective. [0003] With the development ...

AI Technical Summary

Problems solved by technology

However, most of the current methods have a relatively complicated detection process and a large amount of calculation, which limits the development of real-time and portable devices.

Images