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Comparison and Reproducibility of Nuchal Translucency Measurements Using Two-Dimensional and Volume Nuchal Translucency Ultrasound: A Prospective Study

Authors: Kristel Van Calsteren; Veerle Dewulf; Joachim Van Keirsbilck; Luc De Catte;

Comparison and Reproducibility of Nuchal Translucency Measurements Using Two-Dimensional and Volume Nuchal Translucency Ultrasound: A Prospective Study

Abstract

<b><i>Objective:</i></b> To assess the reproducibility and feasibility of automated nuchal translucency (NT) measurement (Volume NT©) in comparison to the two-dimensional (2D) manual approach. The Volume NT technique reveals the correct midsagittal plane automatically and measures the NT at the maximum distance with minimal manipulation. <b><i>Methods:</i></b> In this prospective study, 70 patients underwent NT screening. All standard 2D (standard NT) images and 3D volumes were acquired with an Accuvix V20 Prestige. Off-line measurements of the 3D volumes, manual (manual box NT) and automated (Volume NT) were performed by experienced and nonexperienced operators. Intertechnique and intra- and interobserver agreement were evaluated. <b><i>Results:</i></b> Eleven of 70 cases were excluded due to missing data or aberrant position. The Volume NT program was successful in 83.8% of the cases. Acceptable levels of intraobserver agreement were found for all techniques. The Volume NT technique underestimated NT by 0.21 mm (p < 0.0001) in comparison to standard NT. Between-observer agreement for manual box NT was best for the experienced operators. For Volume NT, the results for between-observer agreement were more ambiguous. <b><i>Conclusions:</i></b> The Volume NT program improves standardization of NT measuring. The technique is reproducible and comparable to the 2D manual approach, particularly for inexperienced sonographers. Further technique refinement should reduce any underestimation.

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Keywords

Adult, Observer Variation, Pregnancy, Humans, Reproducibility of Results, Female, Prospective Studies, Aneuploidy, Nuchal Translucency Measurement

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
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