A COMPARATIVE STUDY ON 6 MeV PHOTON BEAM PERCENTAGE DEPTH DOSE OF VARIAN CLINAC 2300 C/D, ELEKTA SYNERGY PLATFORM, AND SIEMENS PRIMUS LINACS

摘要

This work presents a comparative study of the 6 MeV percentage depth dose curves for photon beams of VARIAN Clinac 2300 C/D, ELEKTA Synergy Platform, and SIEMENS Primus Linacs. The measurements were performed for a set of 7 field sizes (5×5, 10×10, 15×15, 20×20, 25×25, 30×30, 40×40) cm~2, keepingthe same conditions (e.g., geometry, ion chamber voltage and polarity, incremental step and direction). During our study we used the Mephysto MC~2 software and two semiflex ion chambers from Physikalisch-Technische Werkstatten GmbH, calibrated in water under ~(60)Co gamma ray beam.