DIQUAD, LLC, 222 Lakeview Court, Steger, IL 60475-1586, USA.
Health Phys. 2012 Feb;102(2):137-42. doi: 10.1097/HP.0b013e318230778a.
A handheld portable dental intraoral x-ray system is available in the United States and elsewhere. The system is designed to minimize the user's radiation dose. It includes specially designed shielding of the x-ray tube housing and an integral radiation shield to minimize backscatter. Personnel radiation dose records were obtained from 18 dental facilities using both the handheld system and a wall mounted dental x-ray system, providing 661 individual dose measurements. Dental staff doses were also compared for the handheld and conventional systems using both film and digital imaging for the same facilities and staff members. The results indicate that the doses for the handheld systems are significantly less than for wall-mounted systems. The average monthly dose for the handheld systems was 0.28 μSv vs. 7.86 μSv (deep dose equivalent) for the wall-mounted systems, a difference that is statistically significant at the p = 0.01 level. Consequently, there should be no concern about the use of this handheld dental intraoral x-ray system. Additional shielding efforts, (e.g., wearing a lead apron) will not provide significant benefit nor reduce staff radiation dose.
一种手持式口腔内牙科 X 射线系统已在美国和其他地区上市。该系统旨在将用户的辐射剂量降至最低。它包括对 X 射线管外壳的特殊设计屏蔽和整体辐射屏蔽，以最大程度地减少散射。从 18 个使用手持式系统和壁挂式牙科 X 射线系统的牙科设施中获得了人员辐射剂量记录，提供了 661 项个人剂量测量值。还使用相同的设施和员工的胶片和数字成像，比较了手持式和传统系统的牙科工作人员剂量。结果表明，手持式系统的剂量明显低于壁挂式系统。手持式系统的平均每月剂量为 0.28 μSv，而壁挂式系统的深度剂量当量为 7.86 μSv，差异在 p = 0.01 水平上具有统计学意义。因此，不应担心使用这种手持式口腔内牙科 X 射线系统。额外的屏蔽措施（例如，穿铅围裙）不会带来显著的益处，也不会降低工作人员的辐射剂量。
