Fig. 4

Virtual unenhanced DECT images. a 70 keV VMI and (b) virtual unenhanced image of the intrathyroidal parathyroid adenoma in Fig. 1 are shown. The parathyroid adenoma seen on the 70 keV VMI (arrow) cannot be seen on the virtual unenhanced image (b) because of suppression of iodinated contrast on that image. The iodinated contrast in the vessels as well as iodine within the thyroid gland are also suppressed