在模拟马匹头部和四肢风扇束站立计算机断层扫描过程中暴露于辐射,对于使用屏蔽的人员来说似乎是安全的
Kaylynn E Veitch1, Timothy P Szczykutowicz1,2, Sabrina H Brounts1
11Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI.
在马立式CT (sCT) 扫描过程中,人员的辐射暴露是可以控制的. 通过保护措施,职业辐射暴露在使用Asto CT Equina系统的处理人员的安全门以下.
科学领域:
- 兽医放射学 兽医放射学
- 医学物理 医学物理
- 职业健康 职业健康 职业健康
背景情况:
- 马立式CT (sCT) 系统为马提供先进的成像功能.
- 越来越多的sCT临床使用引发了人们对人员辐射暴露的担忧.
- 准确的剂量测量对于确保兽医辐射环境中的安全至关重要.
研究的目的:
- 在模拟马匹头部和四肢sCT扫描期间,量化不同地点的人员所接收的辐射剂量.
- 评估在sCT室中对散射辐射的保护措施的有效性.
- 为操作和协助马匹sCT程序的人员制定安全指南.
主要方法:
- 使用螺旋式风扇束sCT系统 (Equina;Asto CT Inc) 进行模拟扫描.
- 在模拟人员位置 (控制操作员,马手,绳手) 测量散射辐射.
- 使用带有球形离子化室和电表的入口空气,量化操作者/处理者剂量.
主要成果:
- 在模拟头部成像过程中,剂量为13.3μGy (控制操作员),3.5μGy (马操纵者) 和6.8μGy (绳操纵者) 使用围.
- 在模拟四肢成像期间,用围的剂量为1.3μGy (控制操作员),0.2μGy (骨盆四肢绳处理器) 和5.4μGy (胸部四肢绳处理器).
- 在头部扫描期间,在对照操作员位置和在胸部四肢扫描期间,在绳处理者位置观察到最高剂量.
结论:
- 该研究确定了在马类sCT期间具有更高辐射暴露风险的特定人员位置.
- 建议的保护策略包括限制人员,轮换处理者,增加距离,使用屏蔽和眼镜.
- 用Asto CT Equina每年对许多马进行扫描是可以做到的,而无需超过使用保护装备的处理人员的安全职业暴露限值.
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