Objective: To research and design a new model for SPECT quality control testing, which is consistent with the national standards of geometry and materials, and has a lot of advantages, including the optimized and reasonable structure, convenient to use, high efficiency, and little exposure dose for testing personnel. Methods: To investigate current international and domestic standard protocols for the purpose of confirming the key parameter; to optimize the design based on the characteristics of γradiation detection and prevention, and improve the capability of the available technologies. Results: The process of research and design includes:1. Lead Grid model, applied to test the“inherent spatial resolution”and“inherent spatial differential linearity”of the SPECT system, with one die body endowed with bidirectional application as X/Y;2. Dual Linear Source model, used to test“the system spatial resolution (mm)”and“the whole body spatial resolution (mm)”, as well as the“the system spatial resolution (mm)”of double detectors;3. Plane Source model, applied to the simultaneous test of“system plane sensitivity”of the double detectors;4. Holder of Radioactive Source with low scattering. 5. Others for connecting and supporting. 6. Data acquisition and analysis software. This new model has obtained 4 patent licenses. Conclusion:This new model is easy to use, highly effective. It could lessen the dosage of 99Tcm, reduce the radiation injury of personnel. In the future, we need improve the structure of model to reduce radiation dose further, and make a positioning standard for lead grid model during quality control detectingin China, and this work also lay the foundation for the further work in the quality control of the dental panoramic machine.%目的：研究设计一种几何尺寸、材料符合国家标准要求及结构优化合理的用于SPECT系统成像设备质量控制检测的新型模体。方法：调研国内外现有标准及模体资料，确定关键参量；依据γ射线辐射检测与防护特点进行优化设计，采用现有技术提高其使用性能。结果：研制出检测模体：①用于检测SPECT系统“固有空间分辨力”、“固有空间微分线性”的铅栅模(X、Y方向各一个模体)；②用于“系统空间分辨力”和“全身空间分辨力”检测的双线源模，可同时检测双探测器的“系统空间分辨力”；③可同时检测双探测器的“系统平面灵敏度”的平面源模；④低散射放射源夹持器；⑤其他连接支撑部件；⑥采集数据分析处理软件。并获得四项实用新型专利授权。结论：研制的模体使用方便、工作效率高，可降低核素99Tcm的使用量，减少操作人员受照剂量。
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