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- W2013902271 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 tissue Doppler gating (TDOG), a technique in which tissue Doppler data dedicated to compute a gating signal are acquired. We have applied this cardiac gating method to dynamic 3D reconstructions of the heart of 8 fetuses aged 20 to 24 weeks. The gating signal was derived from the amplitude and frequency contents of the tissue Doppler signal. The reliability of the tissue Doppler gating signal for fetal cardiac cycle detection was experimentally investigated by continuous wave spectral Doppler of the umbilical artery. Each recording consisted of a 2D sector scan, trans-abdominally and slowly tilted by the operator, covering the fetal heart over 40 cardiac cycles. The total angle of the sweep was estimatedby recording a separate loop through the centre of the heart, in the elevation direction of the sweep. 3D reconstruction and visualization were performed with the EchoPAC-3D software from GE Medical Systems. Synchronization of B-mode cine-loops with the tissue Doppler gating signal proved to be sufficiently accurate for reconstruction of high-quality dynamic 3D data. We show one example of a B-mode recording with 96 frames per second during 20 seconds. The reconstruction consists of 31 volumes, each with 49 tilted frames. The sampling distances were approximately 0.15 mm in the beam direction, 0.33–0.37 mm azimuth and 0.45–0.51 mm elevation. We generated a complete set of classical 2D views—such as four-chamber, three-vessel and short-axis views as well as views of the ascending aorta, aortic and ductal arches and IVC and SVC with high image quality adequate for clinical use. This study demonstrates the feasibility of tissue Doppler gated high frame 3D ultrasound imaging of the fetal heart with current ultrasound systems. The method is suitable for real time application in future ultrasound systems." @default.
- W2013902271 created "2016-06-24" @default.
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- W2013902271 date "2004-08-01" @default.
- W2013902271 modified "2023-10-16" @default.
- W2013902271 title "OC097: Tissue Doppler gated (TDOG) dynamic 3D ultrasound-future imaging of the fetal heart?" @default.
- W2013902271 doi "https://doi.org/10.1002/uog.1217" @default.
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