ABSTRACT
An early study described the superposition of ultrasound images on the abdomen, using a posit ion-tracked, see-through, head-mounted display [Bajura 92]. Recently, there has been great interest in neurosurgical appli cations of AR. Specifically, the registration of CT, MR, and PET images on a living patient in the operating room may greatly facilitate surgical planning and execution [Gleason 94] [Edwards 95] [Grimson 96]. Typically, registration of the radiographic data with the patient is accomplished by tracking fiducial markers placed on the skin surface, or through other com plex tracking strategies.
