Color Flow Doppler Sonography (CFDS) can disclose patterns of blood flow to the thyroid gland that correlate with underlying disease processes.


Findings on CFDS


absent intraparenchymal vascularity, or

minimal intranodular spots


parenchymal blood flow with a patchy, uneven distribution, or

intranodular spots


mild increase of color flow Doppler signal with patchy, uneven distribution, or

prominent color flow at the periphery of the nodule


markedly increased color flow Doppler signal with diffuse homogeneous distribution, or

marked color flow throughout the entire nodule



The type 0 pattern is seen in normal patients, those who have euthyroid disease, and those with subacute thyroiditis.


The type III pattern is typical for Grave's disease.


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