CONTOUR COLLIMATOR FOR RADIOTHERAPY

摘要

The invention relates to a contour collimator for radiotherapy, comprising a plurality of plate-shaped diaphragm elements provided in a guiding block and movably arranged with respect to one another to form a contour diaphragm for a radiation beam emitted by a radiation source towards the collimator, and at least one drive for moving the diaphragm elements, wherein a drive of its own is associated with each diaphragm element, the drives of a group of diaphragm elements are arranged substantially adjacent to one another, and the drive is a linear motor, wherein each linear motor comprises a linearly movable rod directly fixed to the associated diaphragm element. The invention facilitates a design of a contour collimator with a shape being as compact as possible, and wherein both precise and stable adjustability of the diaphragm elements is achieved without a backlash. In this way improvements to contour collimators are provided.

主权项

1. A contour collimator for radiotherapy, comprising
a plurality of plate-shaped diaphragm elements provided in a guiding block and movably arranged with respect to one another to form a contour diaphragm for a radiation beam emitted by a radiation source towards the collimator, and at least one drive for moving the diaphragm elements, wherein a drive of its own is associated with each diaphragm element, the drives of a group of diaphragm elements are arranged substantially adjacent to one another, and the drive is a linear motor characterized in that each linear motor comprises a linearly movable rod directly fixed to the associated diaphragm element.