Hits:

Indexed by:期刊论文

Date of Publication:2013-07-01

Journal:COMPUTERS IN BIOLOGY AND MEDICINE

Included Journals:SCIE、EI、PubMed、Scopus

Volume:43

Issue:6

Page Number:607-612

ISSN No.:0010-4825

Key Words:Heart sound signal; Optimum heart sound selection; Cyclostationary property; Quality index

Abstract:Noise often appears in parts of heart sound recordings, which may be much longer than those necessary for subsequent automated analysis. Thus, human intervention is needed to select the heart sound signal with the best quality or the least noise. This paper presents an automatic scheme for optimum sequence selection to avoid such human intervention. A quality index, which is based on finding that sequences with less random noise contamination have a greater degree of periodicity, is defined on the basis of the cyclostationary property of heart beat events. The quality score indicates the overall quality of a sequence. No manual intervention is needed in the process of subsequence selection, thereby making this scheme useful in automatic analysis of heart sound signals. (C) 2013 Elsevier Ltd. All rights reserved.