目的　探讨13 1I SPECT/CT在分化型甲状腺癌 (DTC)诊断中的可行性及其定性与定位诊断价值。方法　对 43例手术 + 13 1I治疗后DTC患者 ,行13 1I WBS及13 1I SPECT/CT显像 ,并观察13 1I浓聚灶在CT图像上的位置。对两种显像结果皆为阴性者做作18F FDG符合显像。结果　13 1I SPECT/CT较13 1I WBS具有更高的阳性率 ,并排除 11处13 1I WBS假阳性病灶。结论　对DTC进行 13 1I SPECT/CT断层融合显像 ,在提供更多有关对甲状腺癌病灶的摄碘信息的同时 ,提高了对病灶的定位诊断能力 ,有利于制定和调整治疗和随访的方案 Objective To investigate the feasibility of 13 1I SPECT / CT in the diagnosis of differentiated thyroid carcinoma (DTC) and its diagnostic value of qualitative and localization. Methods Forty-three patients with DTC after operation were treated with 131I WBS and 131I SPECT / CT imaging. The location of 131I focal lesion on CT images was observed. For both imaging results were negative for 18F FDG coincidence imaging. Results 13 1I SPECT / CT had a higher positive rate than 13 1I WBS, and excluded 11 13I I WBS false positive lesions. Conclusions 13 1I SPECT / CT fusion imaging of DTCs provides more information on the uptake of iodine in thyroid cancer lesions and at the same time enhances the ability to diagnose and locate lesions and facilitates the development and adjustment of treatment and follow-up protocols