The clinical use of three-dimensional (3D) ultrasound has rapidly spread to
many specialities over the last ten years. The reason is easy to see, name
ly that single two-dimensional (2D) scans are often difficult to interpret
and the mental correlation of multiple 2D scans to form a 3D image of anato
mical morphology is taxing and uncertain. The rapid development of techniqu
es for the realtime tracking of the spatial position and orientation of ult
rasound probes and the development of computer graphics techniques for the
presentation of anatomical images have made 3D ultrasound a realistic diagn
ostic tool. The authors describe the range of methods of data acquisition a
nd display and provide illustrations of some current clinical applications.