Patent ID: 8457718

Claim:
A medical apparatus comprising a location indicator, a fiducial component, and a position sensor, wherein the location indicator is disposable upon a patient skin surface and uniquely indicates a desired orientation of the fiducial component on the skin surface, wherein the fiducial component is recognizable as at least a part of a fiducial when appearing in image data of a patient, wherein the fiducial component is attachable to the patient at the location indicator without piercing the skin surface and is non-destructively separable from the location indicator, wherein the position sensor is attachable to the patient without piercing the skin surface and adapted to provide position data, wherein the position sensor is adjoinable to the fiducial component without attachment thereto at a predetermined location on the fiducial component and with a predetermined orientation with respect to the fiducial component, and wherein the fiducial component and the position sensor each have a complementary-shaped abutment portion such that mutual abutment without mutual attachment disposes the position sensor at the predetermined location on the fiducial component and with the predetermined orientation with respect to the fiducial component.