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目的本研究采用仿真人体模型,估算并比较不同CT扫描参数下CT引导下腰椎间盘突出介入治疗时患者一个腰椎间隙定位扫描的有效剂量。方法本实验分为四组,标准剂量轴向扫描组、标准剂量螺旋扫描组、低剂量轴向扫描组及低剂量螺旋扫描组。通过仿真人体模型实验了解腰椎间盘突出介入诊疗中患者相应组织及器官的吸收剂量,并根据ICRP 103报告中规定的组织权重因子计算腰椎间盘突出介入诊疗中患者的有效剂量。结果腰椎间盘突出介入诊疗中患者一个腰椎间隙的定位扫描的有效剂量,标准剂量轴向扫描组为0.93μSv,标准剂量螺旋扫描组为2.0μSv,低剂量轴向扫描组为0.27μSv,低剂量螺旋扫描组为0.62μSv;各组中吸收剂量最高的器官或组织依次为骨表面、红骨髓及肾脏。结论本实验说明在腰椎间盘突出介入诊疗中降低m As能明显降低患者的受照剂量,且器官或组织的受照剂量与介入操作部位的距离相关,距操作部位越近,其受照剂量越大。
OBJECTIVE: In this study, a simulated human body model was used to estimate and compare the effective dose of a lumbar intervertebral space scanning in CT-guided lumbar intervertebral disc herniation under different CT scan parameters. Methods The experiment was divided into four groups, the standard dose axial scanning group, standard dose spiral scan group, low dose axial scan group and low dose spiral scan group. Through simulated human body model experiments, the absorbed doses of patients’ corresponding tissues and organs during lumbar intervertebral disc herniation interventional therapy were studied. The effective dose of lumbar intervertebral disc herniation interventional therapy was calculated according to the tissue weight factors specified in the ICRP 103 report. Results In the lumbar intervertebral disc herniation, the effective dose of a lumbar intervertebral space scanning was 0.93μSv in the standard dose scanning group, 2.0μSv in the standard dose spiral scanning group and 0.27μSv in the low dose axial scanning group. The low dose spiral The scanning group was 0.62μSv; the organs or tissues with the highest absorbed dose in each group were bone surface, red bone marrow and kidney in turn. Conclusion This experiment shows that reducing m As can significantly reduce the dose of m As in lumbar intervertebral disc herniation diagnosis and treatment, and the dose of organs or tissues is related to the distance of the interventional operation site. The closer the irradiation dose to the operation site, Big.