Siemens Aktiengesellschaft

Siemens Medical Laboratories, Inc.

Norbert Barthelmes

Alfred Hahn

Werner Rauch

Rafael Nita

Werner Woelfel

In a contour collimator for radiation therapy, a variable aperture is formed by two stacks of aperture plates, which are mounted opposite one another. The aperture plates are connected to a setting mechanism in order to alter the aperture created between the opposed aperture plates. All the aperture plates of each stack are arranged on a respective axle. The aperture plates can be rotated individually around the axles and into the aperture.

Contour collimator

A handle assembly for an x-ray examination apparatus for permitting a technician to position the apparatus above a patient with the aid of a support motor has a grip connected to the apparatus by two support elements, each of the support elements having a defined weak point, such as a segment of reduced thickness, and a plurality of control elements for operating the support motor in response to stresses experienced by the weak point caused by pulling on the grip. The control elements are connected between the support elements and the apparatus, spanning each weak point. Two control elements, disposed at right angles to each other, may be utilized for each weak point.

Handle assembly for an x-ray examination apparatus

A radiographic installation for an x-ray examination apparatus has two antiscatter grids disposed in different planes at different distances from the focus of the radiation source and are alternately movable by a motor connected thereto through a drive train from a standby position outside of the radiation field into a position within the radiation field. The grids are maintained in the standby position by a permanently-acting bias force and are moved into the radiation field by the motor in opposition to this force. The drive train includes a belt having two cams disposed at the opposite ends thereof respectively associated with the antiscatter grids for limiting the movement thereof to define selected positions for the grids.

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Erlangen, Germany

Norbert Barthelmes