Abstract
Objective: Comparison of the diagnostic accuracy of dynamic magnetic resonance imaging (MRI) with color Doppler US and Fine Needle Aspiration Cytology (FNAC) in the differential diagnosis of thyroid carcinoma cases.
 Materials and methods: Study group comprised 28 women and 6 men and all of them had thyroid hormone disorders in their routine examinations. 38 nodules were examined. After radiologic examinations, FNAC and thyroidectomy were applied.
 Results: The dynamic MR was found to have the highest sensitivity and specificity between the color-Doppler US, FNAC, and dynamic MR modalities for the diagnosis of carcinoma. In the dynamic MR examination, the difference between the peak-contrast signal intensity values (p = 0.018) and the minimum-contrast signal intensity values (p = 0.023) calculated at the p < 0.05 level were statistically significant between the malignant and benign nodules.
 Conclusions: We consider that the differential diagnosis of thyroid nodules can be made by analyzing the dynamic MRI data. Malignant thyroid nodules show typical time-signal intensity curves, and we believe that dynamic MRI will be valuable for preoperative assessment of the thyroid nodules in certain conditions like radiology–pathology mismatch.
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