OP31.02: Changes in endometriomas and rectovaginal endometriotic nodules during treatment with norethindrone acetate or extended‐cycle oral contraceptive

Abstract

Methods: Thirty fetuses were included in the study and ultrasound with cephalic volume acquisition 3D was performed twice and prospectively. Measurements of the biparietal diameter (BPD) and head circumference (HC) were performed from volumes by two experienced sonographers and by SmartPlane ® software. These measurements were compared one hand to measurements obtained with automated calipers positioning and the other to conventional 2D measurements. Means and standard deviations of the differences between the series of measurements were calculated. Intra and interobserver reproducibility was assessed using intraclass correlation coefficient (ICC). Bland-Altmann plots were used to evaluate the agreement between the series of measurements. Results: Intra and interobserver reproducibility was high regardless of the measurement technique (ICC> 0.99 for both). The maximum average difference between two series of measurements was 1.12 mm +/-0.86 and 4.02 mm +/-2.8 for the biparietal diameter and the head circumference, respectively. For these two parameters, the agreement between software and operators was clever (95% of the observed differences were <2.5 mm and <4 mm for the BPD and the HC respectively). Conclusions: Agreement between measurements performed from 3D volumes by software and conventional 2D measurements is clever and comparable to agreement observed between semi-automatic and conventional 2D measurements. Reproducibility of these measurements is similar to those observed in experienced sonographers. OP30.11The first trimester fetal central nervous system: a novel ultrasonographic perspective The fetal central nervous system (CNS) and in particular ventricular system, is difficult to examine in any great detail in the first trimester as it is rapidly changing. Furthermore, visualisation of the anatomical complexity of the CNS is limited by image resolution and operator expertise as a thorough knowledge of both sonoembryology and three-dimensional (3D) multiplanar reconstruction is required to obtain diagnostic images.We present a case of 32 year-old nulliparous woman who presented for a routine first trimester ultrasound scan, demonstrating a viable pregnancy with a Crown-rump length of 67mm (13 weeks and 1 day gestation). On two-dimensional imaging, all fetal structures appeared normal. A 3D volume of the fetus was obtained by coronal acquisition and examined using Crystal Vue and Realistic Vue™ rendering software, revealing a novel 3D impression of the fetal ventricular system comparable to digitally reconstructed embryological models.Crystal Vue and Realistic Vue™ enables a perception of depth whilst preserving contextual information. As demonstrated in this case, it allows visualisation of the third, fourth and developing lateral ventricles in a completely novel way not seen using standard imaging methods. The relatively simple use of this software may help to improve our understanding of neurodevelopmental changes in the first trimester and provide insight into pathognomonic markers of ventricular ...