散射辐射分布利用三种不同的形光束计算机断层扫描仪用于面诊断:一项研究研究
Sotirios Petsaros1, Emmanouil Chatzipetros1, Catherine Donta1
1Department of Oral Diagnosis and Radiology, Faculty of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Street, Goudi, 11527 Athens, Greece.
Journal of clinical medicine
|October 14, 2023
概括
这项研究测量了三种形束计算断层扫描 (CBCT) 设备的散射辐射. 结果表明,在特定的距离,辐射水平是安全的操作员在扫描期间与患者留在房间.
科学领域:
- 医学物理 医学物理
- 辐射科学 辐射科学
- 辐射保护 辐射保护
背景情况:
- 圆束计算断层扫描 (CBCT) 在牙科和医学中广泛使用.
- 了解散射辐射对于操作员安全和优化成像协议至关重要.
- 目前的指导方针要求操作人员在CBCT扫描期间离开房间,以尽量减少辐射暴露.
研究的目的:
- 为了估计散射辐射及其在三个不同的CBCT设备周围的空间分布.
- 在患者扫描期间,在CBCT室内确定安全的操作员位置.
- 评估散射辐射水平是否允许操作员在X射线门架附近存在.
主要方法:
- 在三个CBCT设备 (Morita Accuitomo,Newtom Giano HR,Newtom VGi) 上进行了散射辐射的测量.
- 用离子中心不同距离的电离室来评估辐射水平,模拟人类形象幻影的临床条件.
- 使用不同的暴露参数 (kVp,mA,FOV) 来评估它们对散射辐射的影响.
主要成果:
- 在三个CBCT设备中观察到平均分散辐射水平的统计学上显著差异 (p < 0.001).
- 随着距离X射线门的距离的增加,散射辐射的减少,每个装置的减少速率各不相同 (CBCT1: 0.047 μGy/m,CBCT2: 0.036 μGy/m,CBCT3: 0.079 μGy/m).
- 在某些距离上,散射辐射水平低于公众暴露限值1mGy.
结论:
- 在扫描期间,操作员在CBCT房间内的存在在与X射线源的特定距离下是可行的.
- 这些发现支持修订的辐射安全协议,可能允许在CBCT程序期间对患者进行更密切的操作员监督.
- 特定于设备的辐射档案对于建立安全操作距离和协议很重要.
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