A.229 – A versatile asymmetric collimation system for clinical use in external electron beam radiotherapy with Elekta's linac

Introduction: In June 1996 the Medical Physics Department (MPD) of S. Chiara Hospital in Trento designed and realized an electron collimator to be adapted on a standard Elekta's Linac cone applicator for electron beam radiotherapy treatments. The major innovation was the variable asymmetric rectangular collimation of the electron beam, not offered by the vendors until today. Another outstanding feature is its interchangeability between the two different Elekta's Linacs installed at S. Chiara Hospital in Trento used for electron therapy.