Hermsen Kenneth P, Jaeger Stanley S, Jaeger Mackenzie A
Creighton University Medical Center School of Dentistry, Omaha, NE 68178, USA.
J Forensic Sci. 2008 Jul;53(4):917-21. doi: 10.1111/j.1556-4029.2008.00766.x.
The purpose of this study was to determine the radiation levels resulting from leakage and scatter encountered by the forensic dental personnel using the Nomad at St. Gabriel, LA, following Hurricane Katrina. Using a Keithley Radiation Survey Meter and Lucite head phantom, radiation levels were measured at various distances and angles from the Nomad corresponding to the positions occupied by the dental personnel at St. Gabriel. The measurements were used to approximate the maximum total radiation dose from the Nomad to each team member for a 2- and a 4-week deployment. The results show that the maximum scatter radiation dose to any team member was 4.4 microR per X-ray or 0.253 millisieverts (mSv) for a 2-week deployment and 0.506 mSv for a 4-week deployment. Therefore, the leakage and scatter radiation dose from the Nomad was insignificant compared with established radiation safety guidelines of 50 mSv per year for all team members.
本研究的目的是确定在卡特里娜飓风过后，路易斯安那州圣盖博市使用Nomad的法医牙科人员所遭遇的泄漏和散射导致的辐射水平。使用 Keithley 辐射测量仪和有机玻璃头部模型，在与圣盖博市牙科人员所占据位置相对应的、距 Nomad 的不同距离和角度处测量辐射水平。这些测量结果用于估算 Nomad 在 2 周和 4 周部署期间对每个团队成员的最大总辐射剂量。结果表明，对于任何团队成员，最大散射辐射剂量在 2 周部署时为每次 X射线 4.4 微伦琴或 0.253 毫希沃特（mSv），在 4 周部署时为 0.506 mSv。因此，与为所有团队成员制定的每年 50 mSv 的辐射安全准则相比，Nomad 的泄漏和散射辐射剂量微不足道。
