Relationship Between Actual I-131 Retention and the Success Rate of I-131 Ablation in Differentiated Thyroid Carcinoma. Sayed, M.H.1, 2, Aljuneidi, B.M.3, Yasir, M.A.4 1Department of Clinical Oncology and Nuclear Medicine, Faculty of Medicine, Assiut University, Assiut, Egypt; 2Department of Nuclear Medicine, Almana General Hospital, Dammam. 3Department of Radiology and Medical Imaging, Almana General Hospital, Khobar, 4Department of Endocrinology, Almana General Hospital, Khobar, Saudi Arab