Thermoluminescent dosimetry of panoramic radiography
서요섭, 유선경,
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서요섭 ( Seo Yo-Seob ) - Chosun University College of Dentistry Department of Oral and Maxillofacial Surgery
유선경 ( Yu Sun-Kyoung ) - Chosun University College of Dentistry Department of Oral Anatomy
Abstract
This study aims to calibrate a thermoluminescence dosimeter (TLD) using a diagnostic radiation device and evaluate the dose of panoramic radiography. TLD-100s were calibrated using a solid-state dosimeter (Unfors Mult-O-Meter 512L; Unfors Instruments, Billdal, Sweden) and a diagnostic radiation device (HDT-500R; Hyun Dai Medical X-ray Co., Paju, Korea). Forty eight TLDs were placed in 24 sites of a head and neck phantom of a male (ART-210; Radiology Support Devices Inc., Long Beach, CA, USA), and panoramic radiation was performed under exposure parameters of 70 kVp and 10 mA using a ProMax (Planmeca, Helsinki, Finland). Using the International Commission on Radiological Protection (ICRP) 2007 recommendation, the effective dose of panoramic radiography was calculated from the absorbed doses of the tissues of the 24 TLD sites in a head and neck phantom. The absorbed dose of the TLD site was higher in the parotid gland (right: 1854.4 μGy, left: 1788.9 μGy) and lower in the calvarium anterior (3.8 μGy). The effective dose was calculated at 28.4 μSv. The cancer and heritable risks were 1.56×10-6 and 5.67×10-8, respectively. The TLD was calibrated using a diagnostic radiographic device, and the panoramic radiographic dose was evaluated. The findings of this study could be helpful in future dose studies.
키워드
Radiation Dosage; Radiography, Dental; Radiography, Panoramic
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