BMJ:各国CT辐射剂量差异及影响因素

2019-01-03 zhangfan MedSci原创

研究发现各国之间CT辐射剂量在存在很大差异,主要是由于技术参数选择导致的,而非病人、机构或机器特性。这些发现表明,建立一个一致的CT辐射剂量标准是十分必要的

近日研究人员对CT辐射剂量与患者、病情、机构以及机器特性之间的关系进行了考察

2015年11月-2017年8月,来自瑞士、荷兰、德国、英国、美国、以色列和日本等7个国家的151家医疗机构参与研究,对成年患者进行200万次CT检查。考察患者根据患者特点、机构类型、国家,确定腹部、胸部、腹部和头部CT检查中平均有效剂量和采用最高剂量的比例。

研究发现,各机构的平均有效剂量和高剂量检查比例差别很大。根据病人的特点进行调整后,不同机构类型和机器特性的剂量变化不大(10-30%)。相反,即使在调整病人的特点,各国的辐射剂量仍然存在很大差异,腹部CT检查的平均有效剂量相差4倍(7.0-25.7 msv),高剂量检查的比例为17倍(4-69%),胸部和胸腹CT剂量的差异也很大。多因素模型中,各国的剂量差异主要取决于技术参数制定。

研究发现各国之间CT辐射剂量在存在很大差异,主要是由于技术参数选择导致的,而非病人、机构或机器特性。这些发现表明,建立一个一致的CT辐射剂量标准是十分必要的。

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    2019-08-19 gaoxiaoe
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    2019-01-05 jiyangfei
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    2019-01-04 心有所系

    等于什么都没说

    0

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