| 曹金平,刘国庆,徐辉,等.某型号便携式牙科口内机工作场所辐射剂量检测与分析[J].中华放射医学与防护杂志,2026,46(3):288-293.Cao Jinping,Liu Guoqing,Xu Hui,et al.Measurement and analysis of radiation dose in the workplace using portable intra-oral X-ray machines[J].Chin J Radiol Med Prot,2026,46(3):288-293 |
| 某型号便携式牙科口内机工作场所辐射剂量检测与分析 |
| Measurement and analysis of radiation dose in the workplace using portable intra-oral X-ray machines |
| 投稿时间：2025-03-17 |
| DOI：10.3760/cma.j.cn112271-20250317-00030 |
| 中文关键词: 便携式牙科口内机 辐射剂量 散射辐射 辐射安全 |
| 英文关键词:Portable intra-oral X-ray machine Radiation dose Scatter radiation Radiation safety |
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| 中文摘要: |
| 目的 分析某型号便携式牙科口内机辐射场剂量率分布和操作人员的辐射剂量水平。方法 采用CT头模和标准水模模拟受检者,操作人员手持便携式牙科口内机模拟临床操作流程,拍摄牙科口内片,使用AT1123 X-γ射线巡测仪分别在操作人员头部(眼晶状体位置)、甲状腺、胸部、左手、右手、腹部、性腺及足部位置进行测量,并在距地面105 cm处,测量以头模为中心的辐射场0~360°方向1.0、1.5及2.0 m处的周围剂量当量率。结果 操作人员铅橡胶防护服外剂量率为196.4~1 334.9 μSv/h,最高点位于操作人员甲状腺部位,最低点位于足部位置;手部剂量率为197.9~459.9 μSv/h。在铅当量0.5 mm Pb的个人防护用品(铅橡胶颈套和铅橡胶防护服)内,不同位置的辐射剂量率衰减比例均超过98%。结论 便携式牙科口内机同室操作环境下剂量率水平较高,医护人员和周围公众需加强防护,个人防护用品可有效降低便携式牙科口内机操作人员的受照剂量。 |
| 英文摘要: |
| Objective To analyze both the radiation dose rate distribution in the radiation field and the resulting radiation doses to operators when using a portable dental intra-oral machine. Methods A CT head phantom and a standard water phantom were used to simulate the examined patient. The operator simulated the actual clinical procedure by taking intra-oral radiographs using a certain portable intra-oral X-ray machine. An AT1123 X-γ-ray dosimeter was used to measure the radiation doses to the operator's head (eye lens), thyroid gland, chest, left hand, right hand, abdomen, gonad, and feet. Additionally, the ambient dose equivalent rates were measured at 1.0, 1.5, and 2.0 m in the 0-360° direction and at a height of 105 cm above the ground within the radiation field centered on the head phantom. Results The dose rates outside the lead rubber X-ray protective clothing measured 196.4-1 334.9 μSv/h, with the maximum and minimum dose rates observed at the thyroid and the foot, respectively. The dose rates at the hands were determined at 197.9-459.9 μSv/h. In contrast, inside the 0.5 mm Pb personal protective equipment (lead rubber protective neck collar and apron), the attenuation ratios of the ambient dose equivalent rates at different measurement positions all exceeded 98%. Conclusions The indoor operation of portable intra-oral dental X-ray machines induces high dose rates. Therefore, protective measures should be enhanced for both medical staff and the surrounding individuals. Personal protective equipment proves effective in reducing radiation doses to operators of portable intra-oral dental X-ray machines. |
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