对于接受放射性治疗的儿科分化甲状腺癌患者的吸收剂量系数
Tae-Eun Kwon1, Cari M Kitahara1, Choonsik Lee1
1Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD 20850, United States of America.
概括
接受放射性治疗的小儿分化甲状腺癌患者面临的辐射剂量高于成年人. 这项研究为评估接受这种治疗的儿童的辐射风险提供了关键的剂量系数.
科学领域:
- 医学物理 医学物理
- 核医学是一种核医学.
- 儿科瘤学 儿科瘤学
背景情况:
- 差异化甲状腺癌 (DTC) 发病率在儿童中正在上升.
- 放射性 (RAI) 治疗越来越多地用于儿科DTC.
- 准确的辐射剂量评估对于接受RAI的儿科患者至关重要.
研究的目的:
- 在DTC中计算RAI治疗的儿科特异性吸收剂量系数.
- 为有关辐射暴露和儿童风险的流行病学研究提供数据.
主要方法:
- 修改成人生物动力学模型用于儿科动力学.
- 综合生物动力学模型与ICRP儿科voxel幻影的S值.
- 为儿科年龄组计算的吸收剂量系数 (mGy MBq-1).
主要成果:
- 儿童吸收剂量系数明显高于成人值 (高达11.6倍).
- 在儿科患者中,随着年龄的增加,剂量系数下降.
- 清除率和S值是影响吸收剂量系数的关键因素.
结论:
- 确立了RAI治疗的儿科特定的吸收剂量系数.
- 结果有助于估计儿科DTC患者器官剂量和辐射风险.
- 研究结果支持改善对接受RAI治疗的儿童的辐射安全协议.
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