| 刘潇,曾勇明,彭盛坤,郁仁强,王杰,孙静坤.冠状动脉CT血管造影辐射剂量蒙特卡罗软件模拟计算及仿真体模验证[J].中华放射医学与防护杂志,2014,34(2):152-154 |
| 冠状动脉CT血管造影辐射剂量蒙特卡罗软件模拟计算及仿真体模验证 |
| Application of Monte Carlo software in estimating patients’ radiation dose during CCTA and confirmation by anthropomorphic phantom study |
| 投稿时间：2013-08-20 |
| DOI：10.3760/cma.j.issn.0254-5098.2014.02.019 |
| 中文关键词: 冠状动脉 X射线计算机 辐射剂量 数学模型 仿真体模 |
| 英文关键词:Coronary artery X-ray computer Radiation dose Mathematical model Anthropomorphic phantom |
| 基金项目:重庆市卫生局科研基金（10-2-055） |
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| 中文摘要: |
| 目的 应用蒙特卡罗（Monte Carlo）数学模型计算冠状动脉CT血管造影（CCTA）检查中患者的辐射剂量，并验证其准确性和有效性。方法 采用3组管电压（80、100、120 kV）对人体仿真体模行双源CT检查，使用数学模型软件（ImpactDose 2.0）模拟方法测量CCTA 3组管电压的患者器官吸收剂量并转换有效剂量，采用人体仿真体模置入热释光剂量计实验对数学模型模拟的结果进行验证。结果 除肺部以外，利用蒙特卡罗软件模拟计算的所有器官剂量值均小于利用仿真体模测量的；两种方法的相对误差在±50％以内。结论 利用蒙特卡罗软件模拟计算CCTA患者辐射剂量误差在可接受范围内，可用于估算CCTA检查辐射剂量水平。 |
| 英文摘要: |
| Objective To evaluate the accuracy and efficiency of the Monte Carlo software in measuring the radiation dose to the patients who received the CCTA (Coronary Computed Tomography Angiography) examination. Methods A anthropomorphic chest phantom underwent CCTA using three scan parameters (tube voltage 80 kV, 100 kV and 120 kV). Computer Software ImpactDose 2.0 was used to compute the chest organ dose on the basis of the three groups tube voltage CT scan characteristic, and the stimulation results of ImpactDose 2.0 software was verified by use of anthropomorphic phantom thermoluminescence dosimeter experiment method. Results For all the measured organs except for lung, the absorbed organ dose and effective dose of three groups of tube voltages of CCTA measured by the ImpactDose 2.0 was lower than those as measured by anthropomorphic phantom study. The relative error of both methods was within ± 50%. Conclusions Monte Carlo software can be used to estimate the levels of radiation dose during CCTA examination with a tolerable error within the acceptable range. |
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