User-Interactive Registration of Bone with A-Mode Ultrasound.

Investigates the use of an A-mode ultrasound probe tracked by a three-dimensional localizer system for noninvasive transcutaneous palpation and registration of bone surface points exemplified for computer-assisted total hip replacement surgery. Process of transformation between the physical operating site of the patient and pre- or intraoperative data sets; Modes of anatomy-based registration; Influence of soft-tissue multilayer on registration accuracy.