Comparison of Fetal Nuchal Fold Thickness Measurements by Two- and Three-Dimensional Ultrasonography (3DXI Multislice View)

Author:

de Freitas Leonardo da Silva Valladão1,de Bello Barros Fernanda Silveira1,Negrini Rômulo1,de Silva Bussamra Luiz Cláudio12,Araujo Júnior Edward2,Piato Sebastião2,Nardozza Luciano Marcondes Machado2,Moron Antonio Fernandes2,Aoki Tsutomu1

Affiliation:

1. Department of Obstetrics and Gynecology, Medical Science College of Santa Casa of São Paulo (FCMSCSP), São Paulo, SP, Brazil

2. Department of Obstetrics, São Paulo Federal University (UNIFESP) - Carlos Weber Street, 956 Apartamento 113 Visage, Vila Leopoldina, 05303-000 São Paulo, SP, Brazil

Abstract

Purpose. To compare the measurements of fetal nuchal fold (NF) thickness by two-dimensional (2D) and three-dimensional (3D) ultrasonography using the three-dimensional extended imaging (3DXI).Methods. A cross-sectional study was performed with 60 healthy pregnant women with a gestational age between 16 and 20 weeks and 6 days. The 2D-NF measurements were made as the distance from the outer skull bone to the outer skin surface in the transverse axial image in the suboccipital-bregmatic plane of the head. For the 3D we employed the 3DXI multislice view software, in which3×2tomographic planes was displayed on the screen and the distance between the tomographic slices was 0.5 mm. Maximum, minimum, mean, and standard deviation were calculated for 2D and 3D ultrasonography, as well the maximum and minimum, mean, and standard deviation for the difference between both methods. The Wilcoxon signed-rank test was used to compare the two different techniques.Results. 2D-NF showed a mean of thickness of3.52±0.95 mm (1.69–7.14). The mean of 3D-NF was3.90±1.02 mm (2.13–7.72). The mean difference between the methods was 0.38 mm, with a maximum difference of 3.12 mm.Conclusion. The NF thickness measurements obtained by 3D ultrasonography were significantly larger than those detected with 2D ultrasonography.

Publisher

Hindawi Limited

Subject

Obstetrics and Gynaecology

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