High-resolution, three-dimensional imaging of the thyroid gland is obtained with Cervical CT and MRI. However, there is no superior method than ultrasound for the examination of thyroid tissue. 

CT and MRI analyses are not required for every thyroid patient.  In case of internal goiter, CT or MRI is performed to determine the level of the thyroid gland extension in the thoracic cavity.  If metastasis of a known thyroid carcinoma is suspected in the surrounding tissues of the neck, organs or veins, again these advanced imaging analyses are preferred. In practice, only 10-15% of thyroid diseases require CT or MRI. 

    

                           BT: Lung metastasis                        BT: Giant goitre

 

    

                    BT: Internal goiter appearance