[3D and 4D ultrasonography in obstetrics].

The review article analyses the practical application of 3D/4D ultrasound in modern obstetrics. The basic terms applied with this method are introduced including their equivalents in Bulgarian. The main volume rendering modes are described. The advantages of 3D/4D ultrasound in obstetrics are outlined including: 1) improved understanding of normal fetal anatomy and fetal anomalies by the parents; 2) improved maternal-fetal bonding; 3) enhanced diagnosis of fetal anomalies; 4) precise identification of the nature, size and location of certain fetal defects; 5) precise volume measurement of organs with irregular shape; 6) retrospective analysis, data exchange and education. Some specific advantages of 3D/4D sonography are listed regarding its application in the first trimester, for the diagnosis of fetal anomalies and for fetal growth assessment. Some myths about 3D/4D ultrasound popular among patients and medical professionals are discussed. The ethical aspects of 3D/4D ultrasound in obstetrics as well as the future perspectives of the method are also outlined.