Using ultrasound 3D images can be obtained of different parts of the body to assess their well being. It is especially beneficial in detecting foetal anomalies by using this scan.

In 3D fetal scanning, however, instead of the sound waves being sent straight down and reflected back, they are sent at different angles. The returning echoes are processed by a sophisticated computer program resulting in a reconstructed three-dimensional volume image of the fetus’s surface or internal organs, in much the same way as a CT scan machine constructs a CT scan image from multiple x-rays.