[Grey scale echotomography of the thyroid. Comparison with scintigraphy]. / L'échotomographie thyroïdienne avec échelle de gris. Comparaison avec la scintigraphie.

The most recent development in echotomography, the grey scale introduces the notion of the echogenic power of a tissue. The authors present a number of typical cases of thyroid pathology with scintigraphy and echography.