title: Wedge filters for megavoltage roentgen ray beams.
abstract: The aim of this investigation, to construct a range of fixed wedge filters and to simulate these with a motorized wedge, led to the derivation of 5 equations. These equations can be used to construct and test a consistent set of fixed wedge filters, eliminating elaborate trial and error experiments. The fixed wedge filters already in existence for the Philips SL75-10 and SL75-20 linear accelerators fitted these equations rather well. After adapting the motorized wedge of the SL75-14 according to these equations, it simulated the fixed wedges accurately.
mesh_terms: D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation*; D008433:Mathematics; D010315:Particle Accelerators; D011878:Radiotherapy / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D014964:X-Ray Therapy / Q000295:instrumentation*