Optimum heart sound signal selection based on the cyclostationary property

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• 作者：Ting Li^a ; ^b ; ^{tracyli78@yahoo.com.cn} ; ^{liting@dlnu.edu.cn} ; Tianshuang Qiu^a ; Hong Tang^a
• 关键词：Heart sound signal ; Optimum heart sound selection ; Cyclostationary property ; Quality index
• 刊名：Computers in Biology and Medicine
• 出版年：2013
• 出版时间：1 July, 2013
• 年：2013
• 卷：43
• 期：6
• 页码：607-612
• 全文大小：2011 K

文摘

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.