频谱过和细分X射线管电流切断对CT光镜期间干预者的散射暴露的影响
Oliver S Grosser1,2, Martin Volk1,2, Marilena Georgiades1,2
1Department of Radiology and Nuclear Medicine, University Hospital Magdeburg and Medical Faculty of Otto-von-Guericke University, 39120 Magdeburg, Germany.
Bioengineering (Basel, Switzerland)
|August 29, 2024
概括
在CT光镜中,使用锡波器和部分角度计算断层扫描 (PACT) 实现了辐射剂量降低. 这种组合显著降低了干预放射科医生的辐射暴露,提高了实时导航程序中的安全性.
科学领域:
- 医疗成像医学成像
- 辐射物理学 辐射物理学
- 辐射安全 辐射安全
背景情况:
- 计算机断层扫描 (CT) 剂量优化对于患者和操作人员的安全至关重要,特别是在CT光学 (fluoro-CT) 中用于实时导航.
- 干预放射科医生 (IR) 面临辐射暴露风险,需要采取有效的保护措施,特别是头部和部区域.
- 标准的辐射保护材料在某些程序中对IR提供了不足的覆盖.
研究的目的:
- 评估光谱X射线过与锡过器 (Sn过器) 和部分角度计算断层扫描 (PACT) 对减小辐射剂量的综合影响.
- 量化在不同身体区域的IR位置实现的剂量减少.
- 评估Sn过器对整体剂量减少的具体贡献.
主要方法:
- 对环境剂量速率 (H ̇*(10)) 的测量是在身体上部 (头部/部) 和身体下部 (腿部/脚部) 区域进行的.
- 使用了120kV的X射线管电压,3 × 5.0毫米CT对接和0.5秒的旋转速度.
- 协议包括使用和不使用Sn过器以及使用和不使用PACT (部分关闭X射线管电流) 的比较.
主要成果:
- 过器和PACT的组合在两个身体区域显著降低了H ̇*(10).
- 在身体上部地区,H ̇*(10) 随着联合方案的使用,从11.8μSv/s降低到6.1μSv/s (p < 0.0001).
- 单纯的Sn过器对剂量减少有约8% (0.5μSv/s) 的贡献 (p = 0.0005).
结论:
- 结合使用Sn过器和PACT,有效地减少干预放射科医生的辐射暴露.
- 这种方法为IRs提供了更好的保护,特别是在头部和部区域.
- 这些发现支持这些技术的实施,以改善光CT程序中的辐射安全.
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