EP03.03: Fetal neurosonography: experience and correlation with magnetic resonance images (MRI) in T2 weighted images (WI) at Hospital Italiano of Buenos Aires

Abstract

Electronic poster abstracts differential diagnosis, dandy walker, Blake's pouch cyst, Vermian hypoplasia. BV angel was 66 • and we diagnosed Dandy walker. The patient decided to continue with the pregnancy and did not want to take amniocentesis after enough counselling. After that, BPD and ventricle were getting normal size, elevation cerebellar vermis and ventriculomegaly disappeared at 30w. MRI image at 31w revealed only hypoplasia cerebellar vermis and corpus callosum loss.In fetus, CNS was developing and after birth kept change. We have to know that we should become careful to diagnose and explanation of prognosis at 2nd trimester. Objectives: Aim of this study was to evaluate the reproducibility of intracranial anatomy assessment including measurements of the lateral ventricle, cisterna magna and transverse cerebellar diameter during the mid-trimester sonographic scan. Methods: Women undergoing mid-trimester scan (18th to 25th week) for fetal anatomy assessment were invited to participate in the study. Measurements of the lateral ventricle, cisterna magna, and transverse cerebellar diameter were obtained for reproducibility analysis'. Inter-observer and intraobserver reproducibility analysis' were made with correlation coefficients. Mean difference between different observers and in-between same observers were analysed with Bland-Altman plots. Results: A total of 162 women were included in the analysis. Correlation coefficient (CC) of cisterna magna measurements have shown weak to moderate interclass correlation (r=0.28, P=0.001) and strong intraclass correlation (r=0.81, P<0.0001). Measurements of lateral ventricle have shown moderate to strong interclass correlation (r=0.73, P<0.0001) and strong intraclass correlation (r=0.91, P<0.0001). Transverse cerebellar diameter measurements have shown the best interclass and intraclass correlation in-between studied parameters (r=0.88 and 0.91, respectively P<0.0001). Mean difference between different observers were -0.4mm (95% CI: -3.0 to 2.1mm), 0.7mm (95% CI: -1.0 to 2.5mm) and 0.53mm (95% CI: -2.5 to 3.6mm) for measurements of cerebellum, lateral ventricle and cisterna magna, respectively. When grouped according to BMI and presentation, there was no difference between groups regarding the prevalence of an absolute difference greater than 1mm between paired measurements by different observers. Conclusions: Measurements of TCD, LV, and CM during mid-trimester scan have good intra-observer reliability and good inter-observer reliability with the exception of CM measurements. Methods used for measuring these structures have shown good consistency between different BMI categories and different fetal presentations. EP03: IMPROVING THE PRENATAL DIAGNOSIS OF FETAL BRAIN AND CNS ANOMALIES EP03.02Impact of fetal magnetic resonance imaging of the brain in assessment of fetal CNS anomalies M.R. Louis Radio-Diagnosis, Cairo University, Giza, EgyptObjectives: To analyse the impact of MRI of the fetal brain and if it adds to the routine antenatal ultrasound study in the secon...