仿真体模在PET/CT图像质量及剂量控制中应用进展

摘要

临床PET/CT多为全身扫描，患者所受的辐射剂量较大，其中CT的剂量占较大的比例，因此如何保证临床对图像质量的要求下控制PET/CT中CT的剂量尤为重要。仿真人体等效模型是研究PET/CT中CT图像质量及辐射剂量的最佳选择。为此，对仿真人体等效模型及利用该模体对PET/CT图像质量及辐射剂量的研究进行综述，并对PET/CT中CT图像质量及辐射剂量之间的关系进行分析和讨论。%Whole-body PET/CT scanning is accompanied by substantial radiation dose in clinic. A large proportion of the radiation dose for examination obtained from whole-boby PET/CT is from CT scan. So how to control radiation dose without impairing CT image quality determined by the clinic is particularly important. Anthropomorphic phantom is the best choice for the study of radiation dose and image quality in PET/CT. The article reviews the meaning of anthropomorphic phantom and the study about PET/CT image quality and radiation dose with the phantom, Then analyzes the relationship between image quality of CT in PET/CT and radiation dose in the practical application.