Evaluation of dose distribution and shielding efficiency in portable intraoral x-ray device.

Abstract

Portable intraoral x-ray devices are widely used in dental radiology due to their affordability and convenience. However, concerns about radiation exposure to operators from scattered radiation are rising. This study uses an anthropomorphic phantom and a radiation detector to measure the ambient dose equivalent rate caused by secondary scatter radiation. Measurements were taken at different angles, distances, and heights, both with and without a shielding disk (provided by the portable device). The results show that the shielding disk reduces radiation exposure by up to 94%, but its effectiveness varies depending on the operator's position. Sensitive areas, such as the gonads and eye lenses, can receive higher doses under certain conditions. Annual dose estimations revealed that exposure could exceed 1 mSv in some cases, highlighting the need for operators to wear personal dosimeters and follow safety protocols. Recommendations include keeping a safe distance, shielding disk must be used, and avoid to tilt the x-ray unit. This study underscores the importance of properly using and regulating portable x-ray devices to ensure operator safety while maintaining their practical benefits.