The current role of ultrasonography in breast imaging.

When properly performed and interpreted, US is an indispensable tool in breast imaging. Despite improvements in equipment, the major roles for US in the breast remain the differentiation of cysts from solid masses and the guidance of interventional procedures. Neither of these are trivial tasks, for they have significantly reduced the number of surgical biopsies performed in the United States. Research studies investigating feature analysis and Doppler show future potential for US to be used to differentiate benign from malignant solid masses.