Determination of the Absorbed Dose in Water for Small Photon Beams Using Micro-TLDs of LiF:Mg,Ti (Pilot Audit Proposal)

Background: Small-field dosimetry remains an open challenge globally. Thus, it is crucial to consider adequate reference codes of practice for the performance dosimetry. Furthermore, as part good clinical practice, implementation new implies development a audit program. In this work, pilot dosimetric protocol established measuring absolute dose in water small fields using micro-TLDs LiF:Mg,Ti dosimeters. Methods: The dosimeters were irradiated with 6 MV X-ray beam linear accelerator. TLDs calibrated between 0.5 and 3 Gy different field sizes. For audit, at 2 circular proposed consists five TLD forming cross marked radiochromic film identify position central dosimeter during irradiation. Only measurement center used. Results: It was found that percentage difference measured prescribed (2 Gy) irradiation less than 3%. Conclusions: A carried out over accelerator collimator photon beams.