Patent ID: 7575550
Filing Date: 2009-08-18
Classification: A61B

Abstract:
1. Apparatus for determining the disposition of an object relative to a reference frame, comprising: at least one field generator, which generates an electromagnetic field in a vicinity of the object; at least one transducer, which is fixed to the object and which vibrates at a predetermined vibrational frequency and emits energy, responsive to an interaction of the electromagnetic field therewith; one or more detectors in a vicinity of the object which detect the energy emitted by the transducer and generate signals in response thereto; a signal processor which receives and processes the detector signals to determine coordinates of the object, the signal processor calculating the position and/or orientation of the at least one transducer by determining three position vector components and three components of angular orientation; and a display for displaying the position and/or orientation of the at least one transducer.