assessment of the effects of radiation type and energy on the calibration of tld-100

Introduction: in radiation therapy, knowing the dose rates to healthy organs and tumors is beneficial, and thermoluminescent dosimeter (tld) allows for this possibility. this study was aimed at determining the dose-response differences of tlds in various types of radiation, energy levels, and dose rate calibrated with other types of radiation beams and energy and dose levels. materials and methods: in this study, lif:mg,ti (tld-100) was used for dosimetry. photon and electron irradiation was performed by elekta precise linear accelerator. first, tlds were calibrated in three different groups of 6 mv photon, 6 mev electron, and 60co teletherapy photon beam with 50 cgy dose. next, each group was irradiated with 6 mv photon, 6 mev electron, and 60co teletherapy photon beam separately at three different dose levels of 20, 60, and 100 cgy. results: tlds calibrated with electron were significantly different at all dose levels and with all types of radiation from tlds calibrated with photon or 60co teletherapy photon beam (p=0.000). p-value of the tlds calibrated with 6 mv photon versus 60co was less than 0.94. the maximum standard deviation belonged to 100 cgy irradiation, while the least pertained to 20 cgy irradiation. conclusion: calibration of tlds depends on the type of radiation.