Breast ultrasound is a noninvasive (the skin is not pierced) procedure used to assess the breasts. Ultrasound technology allows quick visualization of the breast tissue. Ultrasound may also be used to assess blood flow to areas inside the breasts. The examination is often used along with mammography.
Breast ultrasound uses a transducer that sends out ultrasonic sound waves at a frequency too high to be heard. When the transducer is placed on the breast at certain locations and angles, the ultrasonic sound waves move through the skin and other breast tissues. The sound waves bounce off the tissues like an echo and return to the transducer. The transducer picks up the reflected waves, which are then converted into an electronic picture of the breasts.