Clinical Observation of Imaging Results After Treatment of Thyroid Papillary Carcinoma 131I
Objective To analyze the results of 131I whole body plane imaging and SPECT/CT tomography after treatment of papillary thyroid carcinoma 131I.Methods The clinical data of 86 patients with papillary thyroid cancer treated with 131I after operation in Xinyang Central Hospital from March 2020 to March 2022 were retrospectively analyzed.All patients were treated with 131I whole-body imaging and SPECT/CT tomography,and the imaging results of all patients were observed after 131I treatment.All patients were followed up for more than 6 months,and the results of biopsy pathology or long-term follow-up were used as the gold standard.The diagnostic accuracy,sensitivity,specificity,positive predictive value,and negative predictive value of the two imaging methods for metastatic lesions were statistically compared.Results Among the 86 patients,82 cases of abnormal 131I-related concentration were found by 131I whole-body imaging after treatment,accounting for 95.35%.SPECT/CT imaging showed that 86 cases had abnormal 131I concentration,accounting for 100.00%.All of them were diagnosed as thyroid residual after the operation.Biopsy pathology or long-term follow-up showed metastasis in 36 cases and no metastasis in 50 cases.131I whole-body imaging showed metastasis in 46 cases and no metastasis in 40 cases.SPECT/CT imaging showed metastasis in 38 cases and no metastasis in 48 cases.The diagnostic accuracy,sensitivity,specificity,and positive and negative predictive values of SPECT/CT for metastasis were 95.35%,97.22%,94.00%,92.11%,and 97.92%,which were higher than those of 131I whole-body imaging(69.77%,77.78%,64.00%,60.87%,80.00%),the difference was statistically significant(P<0.05).Conclusion Compared with 131I whole-body imaging,SPECT/CT imaging after treatment of papillary thyroid carcinoma 131I can better observe the abnormal concentration of 131I and determine the thyroid residual status,and improve the diagnostic efficiency of metastatic lesions.