Evaluation of dosimetric characteristics of diodes and ionization chambers in small megavoltage photon field dosimetry

ABSTRACT

Background: modern radiation therapy such as intensity modulated radiation therapy [IMRT] and volumetric modulated arc therapy [VMAT] has resulted in using small therapeutic photon beams. The scope of this work is to investigate the variation in efficiency of different ionization chambers and semiconductor diodes in small multi leaf collimator [MLC] defined fields of ARTISTE linear accelerator