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What Is Digital Breast Tomosynthesis Mammography?
Digital breast tomosynthesis, also called 3D mammography, is a modern breast imaging test used to detect breast cancer. It is an advanced version of the traditional mammogram and helps your doctor see the breast tissue in much greater detail.
In a standard mammogram, two X-ray images of the breast are taken from different angles. These images are flat, meaning the breast tissue appears layered on top of itself. Sometimes this overlapping makes it difficult to spot small tumors or abnormalities.
3D mammography works differently. Instead of taking just two images, the machine captures multiple low-dose X-ray images from several angles around your breast. A computer then combines these images to create a three-dimensional picture of the breast tissue.
These layered images allow your radiologist to examine the breast slice by slice, which makes it easier to identify abnormal areas that might be hidden in traditional mammograms.
Many studies have shown that 3D mammography can:
Detect more cases of breast cancer.
Reduce the number of false alarms.
Decrease the need for repetitive imaging.
Provide clearer results for women with dense breast tissue.
How Does Digital Breast Tomosynthesis Work?
The technology behind 3D mammography may sound complicated, but the process is quite simple.
During the test, the breast is positioned between two plates, just like in a regular mammogram. The plates gently compress the breast tissue. This compression may feel uncomfortable for a few seconds, but it helps spread the tissue out so that the images are clearer.
Once the breast is positioned, the X-ray tube moves in a small arc over the breast. As it moves, it takes multiple low-dose X-ray images from different angles. These images are taken in just a few seconds. After that, a computer processes them and reconstructs them into a series of thin cross-sectional images of the breast.
By examining the breast tissue, doctors will detect the following:
Small tumors.
Calcifications.
Areas of unusual tissue growth.
Who Should Consider Digital Breast Tomosynthesis Mammography?
Digital breast tomosynthesis mammography is beneficial for the following situations:
Women Over 40: Many women over the age of 40 are commonly advised to start regular breast cancer screening. Since the risk of breast cancer increases with age, regular mammograms are important for early detection. For many women in this age group, it provides clearer and more accurate results.
Women With Dense Breast Tissue: Dense breast tissue appears white on a mammogram, which mimics tumors. This makes it harder to detect cancer using traditional mammography. Because 3D mammography examines tissue in thin layers, it helps identify cancer in dense breasts.
People with a Family History of Breast Cancer: Those who have close relatives with breast cancer or other risk factors may benefit from more detailed screening, such as 3D mammography.
Women With a Previous Abnormal Mammogram: If a past mammogram showed something unusual, a 3D mammogram helps the doctors examine the area more closely and decide if further testing is needed.
Anyone Advised by Their Doctor: If your doctor recommends that you do a 3D mammography, based on your risks, medical history, and other testing methods.
How Is DBT Performed?
A breast tomosynthesis exam is usually done as an outpatient procedure and typically takes about 30 minutes to complete. Here is what happens during the test:
A trained radiologist or technician will position your breast on the special platform of the mammography machine.
A clear plastic plate gently presses the breast to hold it in place. Compression spreads the tissue evenly, reduces motion, and allows clearer images using a lower radiation dose.
While the breast is compressed, the X-ray tube moves in a small arc over the breast and takes multiple low-dose images from different angles.
You may be asked to hold your breath for a few seconds while the images are taken to prevent blurry pictures.
The same process is repeated for the second breast to obtain a complete set of images.
After the images are taken, the technician will ask you to wait briefly while the radiologist checks whether additional images are needed.
A computer then merges the images to create a three-dimensional image of the breast, which the doctor reviews to detect abnormalities or early signs of breast cancer.
How to Prepare for DBT?
Preparing for a DBT is simple, but following a few steps will help you capture clear, accurate images. Here is how you should prepare for DBT:
Inform your doctor about your medical history, any breast symptoms, previous breast surgeries, hormone use, or a family history of breast cancer.
If you have had earlier mammograms done at another place, bring those reports, so the radiologist can compare them with the current one.
Do not apply deodorant, lotion, or powder on your breasts or underarms because they can appear on the image and interfere with interpretations.
Wear loose, comfortable clothing since you may need to remove clothing from the waist up and wear a medical gown during the DBT procedure.
Do not schedule the test before your period because your breasts can be tender during this time. So, it is recommended to do it after your period.
Remove any jewelry around the chest area to prevent interference with the imaging process.
Why Is 3D Mammography Better Than Traditional Mammography?
3D mammography has various benefits over traditional mammography. These help your doctors detect breast cancer accurately and reduce unnecessary tests. This includes:
Clearer View of Breast Tissue: 3D mammography creates layered images of the breast, allowing doctors to see the tissue more clearly.
Better Cancer Detection: Studies show that 3D mammography can detect more invasive breast cancers than traditional ones.
Earlier Diagnosis: Because small abnormalities are easier to detect, some cancers are detected at earlier stages.
Fewer False Alarms: Overlapping tissues in standard mammograms can sometimes appear suspicious. 3D imaging reduces these false positives.
Reduced Need for Extra Tests: Clearer images mean fewer women are recalled for repeat mammograms or additional imaging.
Improved Accuracy: Doctors will be able to more accurately differentiate between normal tissue, cysts, and potentially cancerous lumps.
Low Radiation Exposure: Even though multiple pictures are captured, the total radiation dose is similar to that of a traditional mammogram.
Better Patient Experience: Fewer repeat tests and more accurate results help reduce your anxiety and improve the overall screening experience.
Conclusion:
Digital breast tomosynthesis is an advanced imaging study for breast cancer screening. By capturing images from different angles and creating a layered view of the breast tissue, DBT helps your doctors detect abnormalities more easily.
DBT offers clear images, improved cancer detection, and fewer false alarms. It is specifically helpful in women with dense breast tissue and those who are at higher risk of breast cancer.
Early detection is one of the most effective ways to improve breast cancer outcomes, so talk to a screening specialist for further guidance on 3D mammography and its benefits.
Key Takeaways:
DBT helps detect more invasive breast cancers than traditional mammography.
3D mammography creates clearer, three-dimensional images of the breast that help your doctor identify abnormalities that may be hidden in regular mammograms.
DBT reduces false alarms and lowers the chances of further testing.
