A Machine Learning-Based Radiomics Model for the Differential Diagnosis of Benign and Malignant Thyroid Nodules in F-18 FDG PET/CT: External Validation in the Different Scanner

基于机器学习的放射组学模型用于F-18 FDG PET/CT中甲状腺良恶性结节的鉴别诊断：不同扫描仪的外部验证