Apparatus for the generation of focussed acoustic pressure or shock waves for therapeutical applications with an x-ray locating device

摘要

An apparatus for destroying a concretion in a patient with focussed pressure waves includes a pressure wave source for generating focussed pressure waves focussed at a pressure wave focal point for destroying a concretion in a patient, an X-ray source for emitting X-rays, an X-ray receiver for receiving the X-rays from the X-ray source, and an aiming device for enabling the concentration to be positioned at the pressure wave focal point. The aiming device is disposed in an X-ray path between the X-ray source and the X-ray receiver for projecting a pattern on the X- ray receiver when the X-ray source emits X-rays. The aiming device has a structure such that the pattern projected on the X-ray receiver is independent of a location of the X-ray source and the X-ray receiver, and such that a line connecting the X-ray source and a center of the pattern projected on the X-ray receiver always extends through a fixed point in space outside the aiming device, the fixed point in space outside the aiming device being located at a predetermined position relative to the pressure wave focal point.