Breast cancer screening is a vital part of women’s health care, and advancements in imaging technology have made detecting abnormalities earlier and more accurately possible. One of the most effective tools available today is 3D mammography — also called breast tomosynthesis. If you’re scheduled for a mammogram at Cary OB/GYN, this guide will walk you through what 3D mammography is, why it matters, and how to prepare so your experience is comfortable and stress-free.
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What Is 3D Mammography?
A 3D mammogram is an advanced screening tool that takes multiple X-ray images of your breast from different angles and combines them to create a three-dimensional picture of the breast tissue. Unlike traditional 2D mammograms, which capture only flat, two-dimensional views of the breast, 3D imaging allows radiologists to see the breast tissue in “slices,” significantly improving visibility of internal structures.
The improved detail provided by 3D mammography can:
- Detect cancers earlier: 3D imaging has been shown to increase cancer detection rates compared to standard 2D mammograms because subtle abnormalities may be easier to see in layered images.
- Reduce the need for follow-up scans: Because 3D images reduce the overlap of breast tissue that can hide abnormalities, many women are less likely to be called back for additional imaging after their initial screening.
- Offer better imaging for dense breast tissue: Dense breast tissue — which is common — appears white on mammogram images just like cancer does. The layered imaging of 3D mammography makes it easier for clinicians to differentiate between dense tissue and potential abnormalities.
In many imaging centers, including those used by women’s health practices like Cary OB/GYN, 3D mammography is offered alongside traditional 2D mammography for comprehensive screening.
Why Early Detection Matters
Breast cancer can develop with few or no symptoms in its early stages. Mammography remains the most effective method for finding breast cancer before physical symptoms — like lumps or pain — are noticeable. Detecting breast cancer early increases treatment options and the likelihood of successful outcomes. Regular mammograms, starting at the age recommended by your provider, are an important part of preventive care for women.
How to Prepare for Your Mammogram
Preparation can help ensure the most accurate images and the most comfortable experience possible. Here’s what to keep in mind:
- Choose the Right Time
If you still have menstrual cycles, consider scheduling your mammogram for about one week after your period. Breasts tend to be less tender at this time, which can make compression during imaging more comfortable. - Dress Comfortably
Wear a two-piece outfit so you only need to remove your top and bra for the exam. This helps make changing for the procedure easier and more private. - Avoid Certain Products on the Day of Your Exam
Do not apply deodorant, antiperspirant, powder, lotions, creams, or perfume on your breasts or under your arms before your appointment. These products can contain small particles that show up on X-ray images and may interfere with your mammogram. - Bring Your Previous Mammogram Images
If you’ve had mammograms at a different facility in the past, bring those images or ensure they are sent ahead of time. Comparing past and current images helps radiologists spot changes more accurately. - Share Your Medical History
Tell your care team about any past breast surgeries, family history of breast cancer, medication changes, or breast symptoms like lumps or nipple discharge. This information can guide the imaging process and interpretation.
What Happens During the Mammogram Exam
When you arrive for your mammogram:
- Check-In & Prep: You’ll be asked to remove any clothing above the waist and given a gown. Jewelry and metal should be removed.
- Positioning: A trained technologist will position you in front of the mammography machine. Each breast is placed on a platform and gently compressed by a clear plastic plate. The compression spreads the breast tissue evenly to capture detailed images — this pressure lasts just seconds.
- Imaging: For 3D mammography, the X-ray arm moves in a small arc while taking multiple images from different angles. These images are then reconstructed into a 3D view of the breast.
- Repeat on the Other Side: The process is then repeated for the other breast. The entire imaging process typically takes around 20–30 minutes from start to finish.
During the exam you may feel some pressure or mild discomfort, but it is brief. Let the technologist know if it becomes painful — they can make adjustments to help.
After Your Mammogram
Once the images are taken, they are reviewed by a radiologist who looks for any signs of abnormalities. The results are typically sent to your provider, who will discuss them with you. Most women return to normal activities right after the exam.
If anything unusual is seen, your provider may recommend additional imaging or tests — but that doesn’t necessarily mean there’s a serious problem. Follow-up imaging often clarifies findings and ensures accurate diagnosis.
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3D mammography represents a significant advancement in breast imaging technology. It provides enhanced clarity, better visualization through dense tissue, and can reduce the need for repeat scans — contributing to earlier detection and greater peace of mind for women.*
At Cary OB/GYN, we support regular screening and personalized care. If you have questions about scheduling a 3D mammogram, how to prepare, or what screening plan is right for you, our team is here to help.
Contact Cary OB/GYN to learn more about mammography services and schedule your next breast cancer screening — because your health matters.