| 摘要 |
1. Radiotherapy device having a radiation source (3) arranged in a housing (2) and a filter (5), which is arranged in the beam path and has two transparent discs (6, 7), which are fitted essentially in a plane-parallel fashion, are held in a frame (8), and delimit a closed cavity in which a medium that selectively influences the radiation spectrum is arranged, and which medium is also in contact with at least a part of the frame (8), cooling ribs (10) being provided to improve the dissipation of heat, characterized in that the cooling ribs (10) are arranged on theouter circumference of the frame (8) and constructed to project outwards and reach as far as an inner wall of the housing (2), and in that at least one of the discs (6, 7) consists of a plastic disc that bends outwards like a diaphragm given a pressure rise in the cavity. |
