4D ultrasound - 4D-Ultraschall
The 4-D ultrasound is a method of ultrasound (sonography) , wherein the ultrasound device is a three-dimensional image of the object in real time generated. For this reason, 4-D ultrasound is also called live 3-D ultrasound . It is used in particular in the context of medical cardiology and prenatal diagnostics .
Use in prenatal care
The method of 3D ultrasound , which allows a spatial representation of the unborn child or individual organs of the child, is supplemented by a fourth dimension, time. This creates a constantly updated, three-dimensional image on the ultrasound monitor in which the child's movements can be displayed in real time (almost without any time delay).
Just like the 3D ultrasound, the 4-D ultrasound is primarily used to detect or more closely assess the physical characteristics of the unborn child. Chromosomal peculiarities (e.g. Down syndrome , Edwards syndrome , Patau syndrome ) can not be diagnosed. Only certain physical peculiarities (sonographic soft markers ) can give indications of a chromosome peculiarity , so that e.g. B. an amniocentesis for diagnosis can be considered. So "the ultrasound examination ... also becomes the rail for prenatal-invasive measures such as amniotic fluid puncture , chorionic villus samplingand chordocentesis . " 
- Michael Entezami, Mathias Albig, Adam Gasiorek-Wiens, Rolf Becker: Sonographic malformation diagnostics . Teaching Atlas of Fetal Ultrasound Examination . Thieme, Stuttgart 2002, ISBN 3-131-29651-8
- Rolf Becker, Walter Fuhrmann, Wolfgang Holzgreve and others: Prenatal diagnostics and therapy. Human genetic counseling, etiology and pathogenesis of malformations, invasive, non-invasive and sonographic diagnostics as well as therapy in utero . Wissenschaftliche Verlags-Gesellschaft, Stuttgart 1995, ISBN 3-804-71357-2
- Barbara Maier: Ethics in Gynecology and Obstetrics: Decisions based on clinical case studies. Springer, 2013. ISBN 9783642583438 . P. 128