OC180: Comparison between three different methods of visualizing the secondary fetal palate by three‐dimensional ultrasonography

Abstract

Oral communication abstractsperiod and to present data on ultrasound-anatomical correlates of the normal human palate between 12 and 24 weeks of gestation. Methods: Thirty fetuses from normal pregnancies underwent examination of the face and palate using 3D ultrasound imaging in both the axial and reverse face views. To establish ultrasound-anatomical correlates, high-resolution images of human embryos and fetuses of comparable gestational age to those examined by ultrasound were obtained from our collection of human embryology. Results: During the embryological period the palatal shelves grew towards the midline and fused during the 8 th week (LMP) of gestation. The last component to reach full differentiation was the bilobular (bifid) uvula, which becomes monolobular during the 9 th week of gestation. 3D ultrasound images using both maximum and surface rendered modes showed close anatomical correlation with the comparable anatomical specimens, with the exception of the soft palate and uvula. Axial views provided better visualization of the palate up to the 20 th week but thereafter coronal sections were superior owing to the avoidance of acoustic shadowing. Discussion: Prenatal 3D ultrasound images from the 12 th to the 24 th week of gestation correlate well with the landmarks observed in anatomical specimens of comparable gestational ages. However, data from larger series of different ethnic groups are needed to establish reliable patterns of normal growth. OC180Comparison between three different methods of visualizing the secondary fetal palate by three-dimensional ultrasonography

Three-dimensional Ultrasound in the Visualization of Fetal Anatomy in the Three Trimesters of Pregnancy

“…In this case the new volumetric probe 3D multiplanar and surface rendering offers greater possibilities of study of the normality and of diagnosis of the cleft of the primary and secondary palate. [81][82][83] By 3D it is possible to see the alveolus and maxilla by axial scan and secondary palate by coronal scan by scrolling front-to-back in coronal plane. But with this method there is the problem of the maxillary shadow.…”