Fundamentals of Wearable Computers and Augmented Reality, 2nd Edition

505Applications of Augmented Reality in the Operating Room

used for diagnosis and less for guidance of interventional procedures due to their

costs, and, as a consequence such a device is less likely to gain widespread clinical

acceptance.

The Medarpa system, developed at the Fraunhofer Institute, Germany, overlays

CT data onto the patient, similar to the previous system, with the advantage that

the display is mobile (Khan etal. 2006). The intended use is needle guidance for

biopsy procedures. To display the relevant information, the head of the operator

and the mobile display are optically tracked, while the needle is electromagneti-

cally tracked. The system requires patient registration and calibration of the two

tracking systems, so that ...