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a Contrast-enhanced ultrasound perfusion imaging of a small histopathologically proven thyroid adenoma. b Irregular early arterial hypervascularization at the tumor margin with wash-out beginning in the venous phase. c Evaluation of the peak enhancement with higher levels at the margin in comparison with the surrounding tissue. d Numeric values of the TIC analysis (c), VueBox® Screenshot with permission of Bracco Imaging, Italy
