Evaluation of the accuracy of the fetal weight estimation system in estimating the fetal weight / 中华超声影像学杂志

ABSTRACT

Objective To evaluate the accuracy of the fetal weight estimation system in terms of estimating the fetal weight.Methods The fetal weight estimation system developed by the Department of Electronic Engineering,Fudan University was applied to estimate the fetal weight in many hospitals,and the differences between the estimated results of the system and the actual weight of newborn fetuses,as well as the accuracy of the estimation system and the traditional estimation methods were compared.Results A total number of 610 cases were employed,with each case including the ultrasound images of fetus before birth,the corresponding measurement data and the newborn weight.The correlation coefficients between the weight of the newborn babies and the fetal parameters,which were measured by the estimation system in terms of the biparietal diameter,the head circumference,the abdomen circumference and the femur length,were higher than those obtained by manual annotations,with improvements of 0.08,0.17,0.09 and 0.05,respectively.The absolute error of the estimated weight of the system with respect to the actual weight was 44 g smaller than those estimated by traditional method,and the variance of the absolute error was 53 g smaller;while the corresponding absolute percentage error was 1.8％ lower,and the corresponding variance percentage was 1.5％ lower.Conclusions The fetal weight estimation system improves the accuracy of the prenatal ultrasound assessment and provides reliable information to clinical diagnosis.