A Survey of Radiation Dose Around the X-Rays Room Using Optically Stimulated Luminescence (OSL) Dosimeter

Abstract

Background and Objective: This study aimed to measure cumulative radiation doses around diagnostic radiology rooms using optically stimulated luminescence (OSL) dosimeters. Diagnostic radiology rooms where X-rays are used require carefully monitoring of both controlled and supervised areas to ensure radiation doses comply with established safety standards for both workers and the public. This study measured cumulative radiation doses across different types of diagnostic radiology rooms to assess exposure levels in these areas.

Methods: A total of 73 locations were monitored, with two dosimeters placed inside light-protective plastic bags at each monitoring point, located in 29 controlled and 44 supervised locations. Dosimeters were attached to various surfaces, including concrete walls, radiation shielding glass, lead doors, and radiation shielding partitions. The study covered six general X-ray rooms, two computed tomography rooms, one fluoroscopy room, one mammography room, and two dental X-ray rooms, with measurements taken over a 98-day period.

Results:  In supervised areas, the annual cumulative radiation dose ranged from 0.46 to 2.92 millisieverts, while in controlled areas, it ranged from 0.43 to 8.94 millisieverts. Notably, nine supervised locations were found to have radiation doses exceeding 1 millisievert per year.

 Conclusions: Further investigation is warranted to determine the factors contributing to elevated radiation dose levels in these nine locations. It is essential to enhance radiation safety measures and to conduct follow-up dose assessments to maintain compliance with safety thresholds. Regular radiation surveys of diagnostic radiology rooms, including both supervised and controlled areas, should be performed to ensure worker exposure remains within safe limits and to verify the efficacy of room shielding elements such as walls, doors, and radiation barriers.