A breast ultrasound uses sound waves to create a picture of the tissues inside the breast. The breast ultrasound can show all areas of the breast, including the area closest to the chest wall, which is hard to study with a mammogram. Breast ultrasounds do not use X-rays or other types of radiation.

A breast ultrasound is performed by a specially trained technologist. You will be asked to undress above the waist. Gel will be put on your breast to help the transducer pick up sound waves as it moves back and forth over the breast.