Automated Identification of fetal cardiac valve timings

Author

Marzbanrad, Faezeh ; Khandoker, Ahsan H. ; Funamoto, Kiyoe ; Sugibayashi, Rika ; Endo, Miyuki ; Velayo, Clarissa ; Kimura, Yuichi ; Palaniswami, Marimuthu

Author_Institution

Electr. & Electron. Eng. Dept., Univ. of Melbourne, Melbourne, VIC, Australia

fYear

2013

fDate

3-7 July 2013

Firstpage

3893

Lastpage

3896

Abstract

In this paper a new noninvasive method is proposed for automated estimation of opening and closure timings of fetal cardiac valves. These timings are obtained from Doppler Ultrasound (DUS) signal and fetal electrocardiogram (fECG) as a reference. Empirical Mode Decomposition (EMD) is first applied to the DUS signal to decompose it into different components called Intrinsic Mode Functions (IMFs). The envelope of the first IMF is then taken and its peaks are identified. The opening and closure of the valves are then automatically assigned to the IMF peaks by using Hidden Markov Model (HMM). It is shown that this new method can continuously evaluate fetal cardiac valves´ (aortic and mitral) motion timings for 82.5~99.7% of cardiac cycles. The estimated timings are verified using the Pulsed Doppler images. These findings can be used as sensitive markers for evaluating the fetal cardiac performance.

Keywords

biomedical ultrasonics; electrocardiography; hidden Markov models; medical signal processing; obstetrics; DUS signal; Doppler ultrasound signal; EMD; HMM; IMF; automated estimation; automated identification; cardiac cycles; empirical mode decomposition; fECG; fetal cardiac valve closure timing; fetal cardiac valve motion timings; fetal cardiac valve opening timing; fetal electrocardiogram; hidden Markov model; intrinsic mode function; noninvasive method; pulsed Doppler images; Doppler effect; Educational institutions; Empirical mode decomposition; Hidden Markov models; Timing; Ultrasonic imaging; Valves;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE

Conference_Location

Osaka

ISSN

1557-170X

Type

conf

DOI

10.1109/EMBC.2013.6610395

Filename

6610395