Inserm, IADI, Université de Lorraine, 54000 Nancy, France; Department of Obstetrics and Gynecology, Centre hospitalier regional universitaire de Nancy, 54000 Nancy, France; Midwifery Department, Université de Lorraine, 54000 Nancy, France.
Department of Obstetrics and Gynecology, Centre hospitalier intercommunal de Poissy Saint-Germain-en-Laye, 78300 Poissy, France; Université Versailles-Saint-Quentin, 78180 Montigny-le-Bretonneux, France.
Diagn Interv Imaging. 2020 Jul-Aug;101(7-8):481-487. doi: 10.1016/j.diii.2020.03.004. Epub 2020 Mar 30.
To compare fetal ultrasound measurements performed by two observers with different levels of experience and evaluate the potential contribution of the use of three-dimensional (3D) ultrasound on repeatability, reproducibility and agreement of two-dimensional (2D) and 3D-derived measurements.
Two observers (one senior and one junior) measured head circumference (HC), abdominal circumference (AC) and femur length (FL) in 33 fetuses (20 to 40 weeks of gestation). Each observer performed two series of 2D measurements and two series of 3D measurements (i.e., measurements derived from triplane volume processing). Measurements were converted into Z-scores according to gestational age. Variability between the different series of measurements was studied using Bland-Altmann plots and intra-class correlation coefficients (ICC).
Agreement with the 2D measurements of the senior observer was higher in 3D than in 2D for the junior observer (systematic differences of -0.4, -0.2 and -0.8 Z-score vs. -0.1, -0.1 and -0.6 for HC, AC and FL on 2D and 3D datasets, respectively). The use of 3D ultrasound improved junior observer repeatability (ICC=0.94, 0.88, 0.90 vs. 0.94, 0.94 and 0.96 for HC, AC and FL in 2D and 3D, respectively). The reproducibility was greater using the junior observer 3D datasets (ICC=0.75, 0.60 and 0.45 vs. 0.79, 0.89 and 0.63 for HC, AC and FL, respectively).
The use of 3D ultrasound improves the consistency of the measurements performed by a junior observer and increases the overall repeatability and reproducibility of measurements performed by observers with different levels of experience.
比较两名经验水平不同的观察者进行的胎儿超声测量，并评估三维（3D）超声在二维（2D）和 3D 衍生测量的重复性、可再现性和一致性方面的潜在贡献。
两名观察者（一名资深，一名初级）对 33 例胎儿（20 至 40 孕周）的头围（HC）、腹围（AC）和股骨长（FL）进行了测量。每位观察者进行了两次 2D 测量系列和两次 3D 测量系列（即，来自三平面容积处理的测量）。根据胎龄将测量值转换为 Z 分数。使用 Bland-Altman 图和组内相关系数（ICC）研究不同测量系列之间的变异性。
与资深观察者的 2D 测量相比，初级观察者的 3D 测量一致性更高（2D 数据集的系统差异分别为-0.1、-0.1 和-0.6，而 3D 数据集的差异分别为-0.4、-0.2 和-0.8 Z 分数）。使用 3D 超声提高了初级观察者的重复性（2D 数据集的 ICC 分别为 0.94、0.88 和 0.90，而 3D 数据集的 ICC 分别为 0.94、0.94 和 0.96）。使用初级观察者的 3D 数据集可获得更大的再现性（ICC 分别为 0.75、0.60 和 0.45，而 HC、AC 和 FL 的 ICC 分别为 0.79、0.89 和 0.63）。
使用 3D 超声可提高初级观察者测量的一致性，并提高不同经验水平观察者的测量的总体重复性和再现性。
