© Copyright 2026 American Medical Association. All rights reserved.
A real-time ultrasound of the breast(s), whether unilateral or bilateral, is a diagnostic imaging procedure that utilizes high-frequency sound waves to create images of the internal structures of the breast. This procedure is particularly valuable in evaluating breast abnormalities that may have been detected during a physical examination or through mammography. The ultrasound can differentiate between solid masses and fluid-filled cysts, providing critical information about the nature of the abnormality. During the procedure, the patient is positioned supine, with the arm on the side being examined raised above the head to optimize access to the breast. Acoustic coupling gel is applied to ensure effective transmission of the ultrasound waves, and a transducer is placed firmly against the skin. The transducer emits ultrasonic wave pulses, which penetrate the breast tissue and are reflected back, creating echoes that are captured to form images. These images are then analyzed to assess any abnormalities, allowing the physician to identify specific characteristics that may aid in reaching a definitive diagnosis. In cases where a bilateral breast ultrasound is conducted, the same procedure is repeated on the opposite breast. Following the imaging, the physician reviews the captured ultrasound images and generates a written interpretation, summarizing the findings and any recommendations for further action if necessary.
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