US Image Acquisition.

Three-dimensional (3D) ultrasonography, even if recently gaining large popularity, is a relatively new tool compared with 3D reconstructions obtained by CT and MR. Ultrasonography offers unique qualities including real-time imaging, physiologic measurements, use of non-ionizing radiations and invasiveness. Sonographic image quality has benefited from increasingly sophisticated computer technology: to date several systems, able to generate 3D ultrasound images, have been introduced. [ABSTRACT FROM AUTHOR]