Breast ultrasound is a medical imaging technique that uses sound waves to create images of the breast tissue. It is often used to evaluate breast lumps or abnormalities detected during a mammogram or physical examination. The procedure is non-invasive and does not involve radiation, making it a safe option for many patients. During the ultrasound, a technician applies a gel to the breast and uses a small device called a transducer to send sound waves into the tissue. The sound waves bounce back, creating images that can help doctors assess the nature of any abnormalities, such as cysts or tumors.