CT and MRI examinations are not superior to ultrasound in assessing the benignity or malignancy of thyroid nodules. For thyroid nodules to be treated surgically, preoperative CT or MRI of the neck is feasible to show the relationship of the nodule to the surrounding anatomical structures and to look for suspicious lymph nodes to assist in the development of the surgical plan. In order not to interfere with the possible postoperative 131I imaging and 131I treatment, the use of iodine-containing contrast agents should be avoided in CT examinations.　　18F-FDGPET imaging reflects the status of glucose uptake and metabolism by the thyroid nodules. Not all malignant thyroid nodules are positive on 18F-FDGPET, and some benign nodules also take up 18F-FDG [17], so relying solely on 18F-FDGPET imaging cannot accurately identify benign or malignant thyroid nodules.