Open AccessElectron fluence determination per Monitor Unit of a linear accelerator used for radiation therapy
Author(s) -
A. Makridou,
C. Tziaka,
M. Fragopoulou,
S. Stoulos,
M. Zamani
Publication year - 2019
Publication title -
hnps advances in nuclear physics
Language(s) - English
Resource type - Journals
eISSN - 2654-0088
pISSN - 2654-007X
DOI - 10.12681/hnps.2554
Subject(s) - isocenter , fluence , monitor unit , electron , linear particle accelerator , ionization chamber , irradiation , atomic physics , cathode ray , ionization , physics , nuclear physics , beam (structure) , materials science , nuclear medicine , optics , ion , medicine , quantum mechanics , imaging phantom
About 20% of patients in Greece undergoing radiotherapy were irradiated by electron beams with energies ranged between 4 to 20 MeV. The correct determination of electron beam, leads to the proper treatment planning. In this study electron fluence at the isocenter was determined for a linear accelerator ELECTA SL 20 for nominal electron energy of 20 MeV. Two methods have been applied using (a) an ionization chamber in the frame of monthly quality assurance and activation detector (238U). The experimental estimated electron flux, which was in good agreement with the applied calculations using the data of irradiation procedure, ranged between 3.5 up to 4.3 x 108 electrons per cm 2 per sec or 6.1 ±0.7 x 10^7 e.cm-2 per MU.