Fig. 1From: Reference range of fetal thorax using two-dimensional and three-dimensional ultrasound VOCAL technique and application in fetal thoracic malformationsUltrasonography and schematic diagram of fetal thoracic measurements. a, b Thoracic transverse diameter and thoracic anteroposterior diameter; c, d Thoracic circumference; e, f Thoracic area; g lung volume; h Thoracic volumeBack to article page