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论文类型： 期刊论文

发表时间： 2013-12-01

发表刊物： MEDICAL ENGINEERING & PHYSICS

收录刊物： SCIE、EI、PubMed、Scopus

卷号： 35

期号： 12

页面范围： 1831-1836

ISSN号： 1350-4533

关键字： Heart sound cancellation; Cyclic component detection; Instantaneous cycle frequency; Cycle detection

摘要： From the mechanism of heart sound generation, it is known that heart sounds are cyclic following the frequency of the heartbeat. This paper proposes a short-time cyclic frequency spectrum to calculate the instantaneous cycle frequency (ICF) of heart sounds as an estimation of the frequency of the heartbeat. Heart sounds in a lung sound record are detected with the assistance of ICF. Lung sounds (LSs) are recovered by removing heart sounds from the LS record. An LS record is the only input signal source; no other reference signal is necessary. Evaluation by visual inspection, auditory listening and spectral analysis all show that heart sounds are successfully cancelled without hampering the main components of lung sounds. (C) 2013 IPEM. Published by Elsevier Ltd. All rights reserved.