Patent ID: 7329224
Filing Date: 2008-02-12
Classification: A61B

Abstract:
1. A therapy combination comprising: a locating unit for locating a therapy zone within an object; a therapy unit which is provided with a therapy head for focusing energy in a focus, the therapy unit and the locating unit being movable relative to one another; and a measuring device which comprises two sub-systems and serves to determine the relative position of the two sub-systems, one sub-system being attached to the locating unit while the other sub-system is attached to the therapy unit in a defined position relative to the therapy head, wherein the locating unit enables an alignment of the focus of the therapy head relative to a central ray in the therapy zone in response to a determination of the relative position and orientation of the two-subsystems with respect to one another, wherein the sub-system attached to the locating unit includes at least three receivers arranged in a manner that defines a triangle. and wherein the other sub-system attached to the therapy unit includes at least three transmitters arranged in a manner that defines a polygon, the at least three transmitters configured to successively transmit pulse-shaped signals, wherein the sub-system attached to the locating unit is configured to receive the successively transmitted signals from an active one of the at least three transmitters and measure the times of flight of the signals from a respective active transmitter to each of the at least three receivers, the sub-system attached to the locating unit further for measuring times of flight from all transmitters to all receivers.