NDLI: Dynamic 3D ultrasound imaging of the fetal heart

Content Provider	IEEE Xplore Digital Library
Author	Brekke, S. Tegnander, E. Torp, H. Eik-Nes, S.H.
Copyright Year	2002
Abstract	Dynamic 3D ultrasound imaging of the fetal heart is difficult due to the absence of ECG signal for synchronization between loops. In this work we introduce a technique for image synchronization based on acquisition of tissue Doppler signals dedicated to compute a sync-signal. We have applied this method to dynamic 3D reconstructions of the heart of 9 fetuses aged 19 to 24 weeks. The sync-signal is generated by peak velocity detection of the TVI data. Once it is available, we can use a standard technique for reconstruction; in our case the EchoPAC3D software from GE Medical Systems. The basis for one reconstruction is a 2D sector scan, taken trans-abdominally and slowly tilted in free-hand, so that we cover the entire fetal heart over approximately 40 cardiac cycles. The total angle of the sweep is estimated by recording a separate loop through the centre of the heart, in the elevation direction of the sweep. We show an example with 1950 frames over 50 cardiac cycles, recorded with a frame rate of 96 and hence a time span of 20 seconds. The reconstruction consists of 31 volumes, each assumed to have 50 equidistantly tilted frames. Furthermore, every frame consists of 91 beams with 583 samples each. A typical good position of the heart is about 5 cm from the probe, which gives us a radial resolution of 0.15 mm, azimuthal resolution of 0.3/spl deg/ /spl sim/ 0.26 mm and elevational resolution of 0.5/spl deg/ /spl sim/ 0.44 mm.
Sponsorship	Ultransonics Ferroelectr., & Frequency Control Soc
Starting Page	1593
Ending Page	1596
File Size	254963
Page Count	4
File Format	PDF
ISBN	0780375823
ISSN	10510117
DOI	10.1109/ULTSYM.2002.1192598
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-08
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultrasonic imaging Fetal heart Image reconstruction Electrocardiography Aging TV interference Software standards Biomedical imaging Fetal heart rate Probes
Content Type	Text
Resource Type	Article

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