Patent ID: 6408051
Filing Date: 2002-06-18
Classification: A61B

Abstract:
An apparatus for medical X-ray diagnosis and/or X-ray therapy which includes a detection device for electromagnetic detection of the presence of an object in the vicinity of a movable part (6) of the apparatus, and also includes:at least one sensor electrode (16) which is mounted on the movable part (6) in order to produce an electromagnetic field in the vicinity of this sensor electrode, at least one sensor electrode (18) which is mounted on the movable part in order to detect an electromagnetic field in the vicinity of this sensor electrode, a receiver for receiving, via a sensor electrode, an input signal which corresponds to the electromagnetic field in the vicinity of the sensor electrode, and an additional electrode (28), characterized in that the additional electrode (28) is RF coupled to at least one sensor electrode (18), which additional electrode is arranged in the beam path of the X-ray apparatus and in the sensitive area of said sensor electrode (18), and which additional electrode includes a carrier of a material which is substantially transparent to X-rays, said carrier supporting a layer of an electrically conductive material of a thickness such that this layer is substantially transparent to X-rays.