Ultrasound of Breast - Elastography Breast Lesion Elastography

What Is Shear Wave Elastography of the Breast?

Shear wave elastography (SWE) is a specialized, non-invasive add-on to standard diagnostic breast ultrasound that uses harmless sound waves to measure how stiff or soft different areas of breast tissue are. During the test, the ultrasound transducer generates tiny, safe shear waves that travel through breast tissue; stiffer tissue (such as many cancerous or pre-cancerous lesions) slows these waves down more than softer, normal breast tissue, and the machine creates a color-coded map to show relative tissue stiffness. This test does not use ionizing radiation, contrast dye, injections, or any invasive tools, and it causes no pain or discomfort for most patients.

Clinical Uses for Breast Oncology Care

For patients with known or suspected breast abnormalities, SWE helps breast care teams and oncologists better characterize lesions found on standard physical exams, mammograms, or regular breast ultrasound, to distinguish between likely benign (non-cancerous) lumps and those that may be cancerous. It can reduce the number of unnecessary follow-up biopsies for clearly benign lesions, and it can provide additional information about tumor stiffness that may help guide treatment planning for confirmed breast cancer cases. It is particularly useful for patients with dense breast tissue, where standard mammograms may be less effective at detecting small or subtle abnormalities.

What to Expect During Your Appointment

No special preparation is needed for this test: you may eat and drink normally, and you do not need to fast or stop taking any regular medications unless your care team specifically instructs you to do so. You will lie on an exam table with your chest exposed, and a warm gel will be placed on your breast skin to help the ultrasound transducer slide smoothly and capture clear images; the technologist will move the probe over the area of interest for approximately 30 minutes total. There is no claustrophobia risk for this test, as no enclosed machinery is used, and you can resume all normal activities, including work and exercise, immediately after the exam is complete.