Konturenkollimator für die Strahlentherapie

摘要

The invention relates to a contour collimator for use in radiotherapy which comprises several screen elements which can be displaced in relation to each other by means of drive elements. According to the invention the screen elements are supported only on the drive-element side to ensure that even comparatively large screen elements are easy to move. This permits the construction of large contour collimators having relatively heavy screen elements moved by relatively small motors. A preferred embodiment of the invention provides for it to be possible not only to displace individual screen elements but also to move groups of screen elements situated opposite each other towards and away from each other as a group.