Measurement of Duration, Energy of Instantaneous Frequencies, and Splits of Subcomponents of the Second Heart Sound

doi:10.1109/TIM.2014.2383071

	Measurement of Duration, Energy of Instantaneous Frequencies, and Splits of Subcomponents of the Second Heart Sound
	Barma, Shovan 1; Chen, Bo-Wei 1; Ji, Wen 2; Jiang, Feng 3; Wang, Jhing-Fa 1
	2015-07-01
发表期刊	IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
ISSN	0018-9456
卷号	64 期号:7 页码:1958-1967
摘要	This paper presents an approach to measure the duration and the energy of instantaneous frequencies (EIFs) of the aortic (A2) and pulmonic (P2) valve closure sounds for the second heart sound (S2) based on analytic signal representation. In past studies, concepts were usually surrounded around the measurement of splits (i.e., delays between the A2 and the P2) in medical terms based only on visual inspections of the time-frequency representation of the S2s. The values were empirically estimated, and the two vital issues-A2 and P2 overlaps and low energies of P2s-were ignored. In this paper, such issues are addressed, and the relevant parameters are measured by identifying the starting and the ending positions of A2s and P2s. The diagnosis related to the duration and the EIFs of the A2 and the P2 is also examined. Furthermore, the proposed method explicitly guides to distinguish the normal/abnormal S2s and the types of S2 splits. The proposed method is characterized by the Hilbert transform-based IF estimation as well as the localization technique based on the reassignment of smoothed pseudo-Wigner-Ville distribution. To validate the idea, total 31 S2s collected from six healthy normal subjects were tested. The result computed by the proposed method shows that the mean +/- standard deviation (SD) of the duration of A2s and P2s is 46.7 +/- 2.5 and 41.8 +/- 2.4 ms, respectively. The mean +/- SD of the EIFs of A2s and P2s is 13.8 +/- 2.4 and 10.5 +/- 1.7, respectively. These estimated results accord with the evidence in the literature. Moreover, when the proposed method was applied to the abnormal S2s, collected from the database of the Texas Heart Institute, it could correctly distinguish the types of abnormal splits. The experimental result reveals that the accuracy rate of the proposed method is as high as up to 97%, thereby demonstrating the effectiveness of the proposed idea.
关键词	Duration estimation of second heart sound (S2) identification of abnormal splits of S2 S2 signal-change point detection split measurement of S2
DOI	10.1109/TIM.2014.2383071
收录类别	SCI
语种	英语
资助项目	National Science Council, Taiwan[NSC 102-2221-E-006-142-MY3] ; National Science Council, Taiwan[103-2917-I-564-058]
WOS研究方向	Engineering ; Instruments & Instrumentation
WOS类目	Engineering, Electrical & Electronic ; Instruments & Instrumentation
WOS记录号	WOS:000355990800016
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/9745
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Barma, Shovan
作者单位	1.Natl Cheng Kung Univ, Dept Elect Engn, Tainan 70101, Taiwan 2.Chinese Acad Sci, Inst Comp Technol, Beijing 100190, Peoples R China 3.Harbin Inst Technol, Sch Comp Sci & Technol, Harbin 150001, Peoples R China
推荐引用方式 GB/T 7714	Barma, Shovan,Chen, Bo-Wei,Ji, Wen,et al. Measurement of Duration, Energy of Instantaneous Frequencies, and Splits of Subcomponents of the Second Heart Sound[J]. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT,2015,64(7):1958-1967.
APA	Barma, Shovan,Chen, Bo-Wei,Ji, Wen,Jiang, Feng,&Wang, Jhing-Fa.(2015).Measurement of Duration, Energy of Instantaneous Frequencies, and Splits of Subcomponents of the Second Heart Sound.IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT,64(7),1958-1967.
MLA	Barma, Shovan,et al."Measurement of Duration, Energy of Instantaneous Frequencies, and Splits of Subcomponents of the Second Heart Sound".IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 64.7(2015):1958-1967.