Comparasion of shear wave elastography and 18F-FDG PET/CT imaging in diagnosis of thyroid microcarcinoma / 中国医学影像技术

ABSTRACT

Objective To compare the diagnostic value of shear wave elastography and 18F-FDG PET/CT imaging in diagnosis of thyroid microcarcinoma.Methods Shear wave elastography and 18F-FDG PET/CT data of patients with thyroid nodules confirmed by pathology were analyzed retrospectively.The sensitivity,specificity,accuracy,positive and negative predictive value of the two methods in diagnosis of malignant thyroid micronodules were compared.Results In all of the 48 micronodules,37 were malignant,11 were benign.The sensitivity,specificity,accuracy,positive predictive value and negative predictive value of shear wave elastography and 18F-FDG PET/CT were 91.89％ (34/37),81.82％ (9/11),89.58％ (43/48),94.44％ (34/36),75.00％ (9/12) and 29.73％ (11/37),72.73％ (8/11),39.58％ (19/48),78.57％ (11/ 14),23.53％ (8/34),respectively.The sensitivity,accuracy and negative predictive value between the two methods had statistical difference (all P＜0.05),and the specificity and positive predictive value between the two methods had no statistical difference (both P＞0.05).Conclusion Compared to 18F FDG PET/CT imaging,the diagnositic value of shear wave elastography in diagnosis of thyroid microcarcinoma has obvious advantages.