Evaluation of ۳D Printed Anthropomorphic Head Phantom for Calibration of TLD in Eye Lens Dosimeter

Background: Calibration of Thermo Luminescent Dosimetry (TLD) in eye lens dosimeter requires a standard phantom. The use of anthropomorphic phantoms in calibration needs evaluation.   Objective: This study aimed to analyze the angular response of the TLD on the fabricated ۳D anthropomorphic head phantom and Computerized Imaging Reference Systems (CIRS)- Computed Tomography (CT) dose phantom as a standard phantom irradiated with Cs-۱۳۷ and to compare the absorbed dose and linear attenuation for both phantoms. Hp(۳) analysis, conversion coefficient (hpK(۳)), and calibration factor (CF) are also investigated.Material and Methods: In this experimental study, the fabricated ۳D printed anthropomorphic head phantom was analyzed using polylactic acid (PLA) with the skull and then filled with the artificial brain and cerebrospinal fluid (CSF) as a test phantom. TLD-۷۰۰H and TLD Reader Harshaw ۶۶۰۰ plus were used to analyze the angular response of Cs-۱۳۷ radiation and to determine the absorbed dose and linear attenuation coefficient of test and standard phantoms. Results: The effect of the angle of radiation source towards TLD reading at the anthropomorphic head phantom has a similar value to the standard phantom with a calibration factor ranging from ۰.۸۲ to ۱. The absorbed dose measurement and the linear attenuation coefficient of the anthropomorphic head phantom with the standard phantom have different values of ۲.۵۲ and ۳.۷۸%, respectively.  Conclusion: The fabricated ۳D printed anthropomorphic head phantom has good potential as an alternative to standard phantoms for TLD calibration in eye lens dosimeter.

کلیدواژه ها:

Calibration ، Dosimetry ، Phantom ، Thermoluminescent Dosimetry ، Radiation