Apparatus for the generation of focussed acoustic pressure or shock waves for therapeutical applications with an x-ray locating device
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United States of America Patent
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Jan 24, 1995
Grant Date -
N/A
app pub date -
Jan 22, 1993
filing date -
Mar 24, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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.
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