Imaging of the Breast
Mammography, ultrasound, and MRI answer different questions. Choosing the right test depends on symptoms, age, risk, and earlier results.
The key things to know
- Each imaging method has strengths and limits.
- A biopsy recommendation is not a diagnosis.
- Old images help assess change over time.
Mammography
A mammogram uses low-dose x-rays to show breast tissue, including small calcifications that may not be visible on ultrasound. Screening mammography looks for abnormalities before symptoms appear; diagnostic mammography investigates a symptom or earlier finding. Compression improves image quality and briefly feels uncomfortable for some people. Tell the team if you have implants, are pregnant, or have a painful area.
Ultrasound
Ultrasound uses sound waves and can help distinguish a fluid-filled cyst from a solid finding. It is often used to investigate a particular lump, assess underarm nodes, or guide a biopsy. It may be the initial test in younger patients or during pregnancy. Ultrasound does not show every cancer and is not a universal replacement for screening mammography.
MRI and selected additional tests
Breast MRI can be useful in high-risk screening and selected treatment-planning situations. Many examinations use a contrast injection and require lying still face down. More sensitivity can bring more false alarms and biopsies. Kidney problems, pregnancy, implants, metal devices, and previous reactions should be discussed in advance. Your team will explain whether MRI adds useful information in your case.
Understanding a report
Imaging reports often use a BI-RADS category to communicate the level of concern and the next step. A recommendation for biopsy is not itself a cancer diagnosis; tissue examination provides that answer. Bring previous images for comparison and obtain a clear follow-up date. Persistent suspicious symptoms deserve reassessment even when the initial scan is reassuring.
Take these questions to your appointment
- What question will this scan answer?
- What does my BI-RADS category mean for the next step?
Sources & review
This is original educational content based on the sources below, not reproduced textbook material. Website supervisor: Dr. Nizar Ismail. Individual medical review of this article is pending.
This information cannot replace diagnosis or a personal treatment plan. Consult your care team about symptoms or decisions about your treatment.