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对比剂对儿科诊断光镜中的器官剂量测量的影响:空白囊回形图
Wyatt W Smither1, Emily L Marshall2, David Borrego3
1Medical Physics Program, College of Medicine, University of Florida, Gainesville, FL 32611, United States of America.
Physics in medicine and biology
|August 13, 2024
概括
在儿科空白囊尿表图 (VCUG) 模拟中包含对比剂,对于准确的器官剂量计算至关重要. 这项研究强调了对比度度如何影响儿科光学中的剂量系数,影响辐射安全评估.
科学领域:
- 医学物理 医学物理
- 放射性剂量测量 放射性剂量测量 放射性剂量测量
- 儿科成像学 儿科成像学
背景情况:
- 国际辐射保护委员会 (ICRP) 工作组113正在为各种成像模式建立参考剂量系数 (DC).
- 精确的剂量评估在儿科诊断光镜,特别是为空白囊回形图 (VCUG) 检查,需要考虑对比剂.
- 以前的剂量计算可能没有完全考虑对比介质体积度的影响.
研究的目的:
- 为了研究含的对比度体积度对儿科诊断光镜器官剂量系数 (DCs) 的影响.
- 为了证明在蒙特卡洛辐射传输模拟中包含对比介质的重要性,用于VCUG检查.
- 为ICRP工作组113.提供支持参考器官DC开发的数据.
主要方法:
- 在粒子和重离子运输代码系统中利用了ICRP新生儿和15岁的女性参考幽灵.
- 建模了四个成像场,代表临床VCUG检查,由经验丰富的儿科放射科医生定义.
- 在0%,25%,50%,75%和100%体积度下模拟的化对比溶液,计算器官DCs用于现场器官.
主要成果:
- 对于两个女性幻影,尿道膀壁,结肠壁,卵巢和子宫的器官DC被计算出来.
- 随着对比度体积的增加,观察到器官DC的变化;有些增加,而另一些则在100%度下降.
- 器官DC的百分比差异为新生儿幻影的0% - 10%和15岁幻影的0% - 22%.
结论:
- 含有的对比剂的度显著影响儿科VCUG检查中的器官剂量系数.
- 将对比介质体积纳入辐射传输模拟对于VCUG中准确的剂量计算至关重要.
- 这些发现对于完善参考剂量系数和确保儿科光学中的辐射安全至关重要.
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