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COMPARISON OF OFF-LINE THREE-DIMENSIONAL AND REAL-TIME TWO-DIMENSIONAL ULTRASOUND ASSESSMENT OF NUCHAL TRANSLUCENCY: A PILOT STUDY OF 100 CASES
S. Sudhakar, M. J. Taylor. Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, UK
Background: Good levels of correlation between NT assessment by two-dimensional (2D) and transvaginal three-dimensional (3D) ultrasound (US) have been demonstrated,1,2 but few studies have addressed the reliability and feasibility of transabdominal 3D US.3 Evidence suggests that real time US to assess nuchal translucency (NT) may not be required in the future as 3D volumes can be stored and analysed off-line.4
Objective: To assess the reliability and feasibility of measuring NT in 3D vs 2D using a stored dataset.
Methodology: Prospective study of 100 singleton pregnancies between 11 and 13+6 weeks. NT was measured in 2D according to Fetal Medicine Foundation guidelines. A 3D volume sweep of the entire fetus in mid-sagittal plane was captured, stored on the machine’s hard drive and copied to a compact disc. This dataset was analysed off-line on a laptop computer
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