Method and apparatus for the three-dimensional location of a concrement
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United States of America Patent
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Issued Date -
Sep 18, 2003
app pub date -
Dec 2, 2002
filing date -
Dec 10, 2001
priority date (Note) -
Abandoned
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Abstract
A method for locating a concrement (3), for example a renal calculus or gallstone, in the body (1) of an organism for positioning a therapy device such as a lithotripsy instrument, whereby a substantially vertical projection image of the concrement is generated on an image window (6) by means of a radiation source (5), the body is displaced in the body plane relative to the radiation source (5), the projection d' of the displacement distance is captured with a further projection image and the vertical z-position of the concrement is calculated as 1 z = z 'd d ' , where z' is the fixed distance between the radiation source (5) and the image window (6).
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