Imaging of thyroid nodules

Ultrasonography and scintigraphy are the first line diagnostic imaging moda lities for the evaluation of thyroid nodules. Scintigraphy provides functio nal informations, mainly detection of hot nodules. US provides accurate mor phologic evaluation and it may sometimes suggest malignancy. US is the moda lity of choice for follow-up of non resected nodules and is very useful for guidance during biopsy. CT and MRI are mainly used for preoperative evalua tion of thyroid nodules.