Fig. 1.

Classification of the 250 study subjects by uptake pattern on post-ablation whole body scan. a If iodine uptake was observed only in the thyroidectomy bed, patients were assigned to group 1 (negative midline uptake). b On the other hand, if localized iodine uptake was observed in the central area above the thyroidectomy bed (arrowed), patients were assigned to group 2 (positive midline uptake)