title: New method for tracking fetal breathing movements using real-time pulsed Doppler ultrasonographic displacement measurement.
abstract: To develop a clinical device for monitoring FBM with a simplified mechanism, the multichannel pulsed Doppler device was achieved by modifying the ultrasonographic module and probe of a cardiotocograph. A new algorithm of signal processing with a high-accuracy displacement estimation technique produced real-time and continuous displacement calculations. In vivo measurements demonstrated that real-time output produced commendable quality in FBM tracking. The displacement of a few hundred micrometers because of FBM was measured successfully. The results suggest that quantitative assessments of FBM should be possible with this technique.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, University of Toyko, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Shinozuka
authors.forename: Y
authors.initials: Y
authors.lastname: Yamakoshi
authors.forename: Y
authors.initials: Y
authors.lastname: Taketani
mesh_terms: D005260:Female; D005323:Fetal Monitoring; D005324:Fetal Movement / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D012119:Respiration / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted; D018617:Ultrasonography, Doppler, Pulsed / Q000379:methods*; D016216:Ultrasonography, Prenatal