Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2004-04-12
2010-02-09
Casler, Brian (Department: 3737)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
C600S407000, C600S425000, C600S426000, C600S429000, C382S128000, C606S091000, C424S423000, C378S165000, C378S062000
Reexamination Certificate
active
07660624
ABSTRACT:
In a method and apparatus to detect position changes of an implant x-ray detectable markers are arranged in the environment of the implant, and 2D x-ray exposures are obtained at temporal intervals of a region containing the implant in which a distribution of the markers as well as of marked points of the implant are visible in each 2D x-ray exposure. A first of the 2D x-ray exposures is obtained at a first point in time from one projection direction, and a second of the 2D x-ray exposures is obtained at a second point in time from another projection direction. The distribution of the markers and marked points is determined in the first and second 2D x-ray exposure by an evaluation device, and from the distributions a degree of probability is calculated that the distribution of the first 2D x-ray exposure and the distribution of the second 2D x-ray exposure are projections of the same three-dimensional distribution of markers and marked points. An automated detection of position changes by implants with reduced x-ray exposure for the patient is facilitated.
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Georg Christian
Hornegger Joachim
Klose Klaus Jochen
Welker Volkmar
Casler Brian
Lamprecht Joel M
Schiff & Hardin LLP
Siemens Aktiengesellschaft
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