CT辐射剂量检测仿真人体模的研制

Development of simulation phantom for CT radiation dose measurement

目的:研制可普及临床使用,并可快速测得X线敏感器官组织所处位置辐射强度的仿真人体模。方法:研究人体X线辐射敏感器官组织,确定体模辐射感兴趣区域;建立数学模型并研究不同组织等效材料的技术特性;比对分析现有类型电离室探头的技术性能,综合相关因素选择合适探头;按照成人、儿童2种尺寸,根据敏感器官位置设计体模结构并进行验证实验。结果:设计的仿真人体模可以等效测量多器官的辐射剂量值,达到了预期目标。结论:该体模仿真程度高、检测探头拆卸简便、辐射剂量检测方便,为检测技术人员提供了一套方便的检测模具。

Objective To develop a simulation phantom for clinical detection of radiation intensity at the organs or tissue vulnerable to X-ray.Methods The organs or tissue vulnerable to X-ray radiation were explored to determine the region of interest of the radiation to the phantom.A mathematical model was established, and the technical characteristics of the equivalent materials of different tissues were studied.The existing ion chamber probes were compared on the technical performances, and the probe was selected with considerations on comprehensive factors.The phantom was gifted with two sizes of adult and child and designed based on the positions of sensitive organs.Practical trials were carried out to test the performances of the phantom.Results The phantom could be used to measure the radiation dose which was equivalent to the value of multiple human organs, and the desired requirements were fulfilled.Conclusion The phantom gains advantages in simulation fidelity, withdrawal of the probe and etc, and thus is worthy promoting practically.