3D Ultrasonography Fetal Lung Volume Measurement and Neonatal Respiratory Function

The angle of volume sampling varied throughout gestational age with a maximum limit of 75° in the third trimester. After scanning the volume, multiplanar imaging in the 3 orthogonal ultrasonographic sections was analyzed to reconstruct the 3D ultrasound image. Before its volume was analyzed, each lung was carefully identified on the 3 orthogonal multiplanar imaging sections. We used the rotational technique that entails the VOCAL imaging program to measure lung volume. A transverse section of the multiplanar imaging was chosen as the reference image for volume analyses