盆腔X射线检查中的患者剂量和相关暴露参数:对放射系统的依赖性
Sachith Welarathna1,2, Sivakumar Velautham3, Sivananthan Sarasanandarajah4,5
1Department of Physics, University of Peradeniya, Peradeniya, 20400, Sri Lanka. sachith.welarathna@sci.pdn.ac.lk.
Radiation and environmental biophysics
|July 17, 2024
概括
计算机放射学 (CR) 和数字放射学 (DR) 系统在患者的剂量和盆腔X射线暴露参数中显示出显著的差异. 优化设置对于患者保护至关重要,尤其是在CR系统中给予更高剂量的情况下.
科学领域:
- 医疗成像医学成像
- 辐射物理学 辐射物理学
- 辐射保护 辐射保护
背景情况:
- 计算机放射学 (CR) 和数字放射学 (DR) 系统具有独特的技术特征,影响患者的辐射剂量和暴露设置.
- 盆腔X射线检查涉及放射敏感器官,需要优化CR和DR的暴露参数,以尽量减少患者的剂量.
- 现有的文献表明患者剂量和暴露参数在不同放射系统和地理位置的变化.
研究的目的:
- 为了前性地比较CR和DR系统之间的患者剂量和暴露参数,用于成人骨盆X射线检查.
- 评估系统技术对斯里兰卡医疗保健机构辐射剂量和暴露设置的影响.
- 确定优化放射性参数的潜在领域,以加强患者保护.
主要方法:
- 一项前性研究,涉及56名接受盆腔X射线检查的成年患者 (25 CR, 31 DR).
- 记录患者的人口统计,暴露参数 (kVp,mAs),并使用PKA的PKA测量器测量患者剂量.
- 使用曼-惠特尼U测试进行统计分析,以比较CR和DR系统数据.
主要成果:
- 与DR系统相比,CR系统的平均kVp (73.2对67.8),mAs (37.8对31.6) 和PKA (2.29 Gy cm2对1.61 Gy cm2) 显著更高,尽管患者体重和BMI相似.
- 在CR和DR系统之间观察到PKA和kVp的统计学上显著差异 (p <0.05).
- 这项研究中的平均mAs和PKA值大大高于CR和DR系统的文献报告值,即使患者体重和BMI较低.
结论:
- CR和DR系统之间的技术差异在骨盆X射线检查中显著影响患者剂量和暴露参数.
- 研究的医院当前的mA设置需要优化,并且应该为盆腔X射线建立系统特定的暴露参数和参考剂量水平.
- 实施优化参数和参考剂量水平对于改善盆腔放射学中患者的辐射保护至关重要.
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