2D ultrasound examination is an indispensable part of basic examination. The principal image of the examination is created by ultrasound, as it passes tissue of different density, depth, blood supply and localisation. However, the possibilities of modern technology have enabled to direct the ultrasound into most different directions and, as the computer processes the obtained data, a spatial image is received, which is currently known as 3D ultrasonography. As technologies are upgraded, spatial image in real time can be obtained, which is called 4D ultrasonography.