Apparatus for producing tissue compensating filter for use in radiation therapy

摘要

Apparatus for fabricating a compensating filter for use in radiation therapy includes a stylus 38 for tracing the profile of a surface portion of a patient and a cutter 42 for cutting a form. The stylus and cutter are positioned on first and second guides 32,34 which are connected by a tie bar 43. A plurality of linkages translate movement of the stylus along its guide to the cutter along its guide. A mold is cut in the form which is filled with compensating material for forming the filter. The ratio of movement of the stylus to the cutter is established by the linkages in accordance with the ratio of radiation absorption of the compensating material to the radiation absorption of human tissue.