CAJ | 학술논문

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.
목적 응용몽특잡라(Monte Carlo)수학모형계산관상동맥CT혈관조영(CCTA)검사중환자적복사제량,병험증기준학성화유효성.방법 채용3조관전압(80、100、120 kV)대인체방진체모행쌍원CT검사,사용수학모형연건(ImpactDose 2.0)모의방법측량CCTA 3조관전압적환자기관흡수제량병전환유효제량,채용인체방진체모치입열석광제량계실험대수학모형모의적결과진행험증.결과 제폐부이외,이용몽특잡라연건모의계산적소유기관제량치균소우이용방진체모측량적；량충방법적상대오차재±50％이내.결론 이용몽특잡라연건모의계산CCTA환자복사제량오차재가접수범위내,가용우고산CCTA검사복사제량수평.
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 InpactDose 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.