- 3-D Mammography increases Breast Cancer Detection
- Detects 35 percent more breast cancers than traditional 2D mammograms
- 3-D mammography is also a more sensitive mammogram for picking up small breast cancers
- The American Cancer Society estimates more than 268,000 new invasive cases of breast cancer will be diagnosed this year, and more than 40,000 women will die from breast cancer.
- 3-D mammography, may significantly reduce the number of women who undergo breast biopsy for a non-cancerous lesion following an abnormal mammogram,
- 3D Mammography More Likely to Find Small Invasive Breast Cancers, Especially in Women Younger Than 50
- Comfort Paddle provides noticeably less pain, less compression, and anxiety for the patient.
For women over the age of 40, getting a yearly screening mammogram is essential and recommended part of maintaining their ideal preventive measures in the battle against Breast Cancer. Digital breast tomosynthesis (DBT), also known as 3-D mammography, is an imaging technology that uses a series of low-dose mammographic exposures to provide a 3-D reconstruction of the breast. In studies comparing both technologies on the same women, 3-D Mammography has proven to be more sensitive than 2-D digital mammography in detecting cancers.
Technically, Mammography is a low-dose X-ray that allows radiologists to look for changes in breast tissue. The gold standard in breast cancer screening has been 2D digital mammography, which takes two X-ray images of the breast, one from the top and one from the side. It identifies a large number of breast cancers, but its value is limited: The images are flat, making them more difficult to interpret because overlapping tissue can hide cancerous tumors.
What is 3D mammography?
Three-dimensional mammography (also called digital breast tomosynthesis, digital tomosynthesis, or just tomosynthesis) creates a three-dimensional picture of the breast using low-dose X-rays. 3D mammography is an imaging procedure in which an X-ray moves in an arc over the breast, taking multiple images from different angles. The 3D pictures are synthesized by a computer into thin, 1-millimeter images, making it easier to see tumors. The radiologist reviews about 200-300 images with 3D mammography, compared to only four derived from a 2D mammogram.
The fight against breast cancer is not one-dimensional.
ASPIRE Cristalle with Digital Breast Tomosynthesis (DBT) or 3D Mammography is built smarter because it is built with insight into image quality, operational excellence, and better patient experience.
Advancements in technology have improved screening quality while decreasing the need for additional images. In 2011, the Food and Drug Administration approved the use of tomosynthesis or 3D screening mammography. Since then, multiple studies have found that 3D screenings have reduced the need to recall patients for additional images up to 17 percent. “The 3D mammogram is really proving itself to be a better mammogram in that it reduces the need for additional views and may reduce patients’ anxiety,” says Dr. Queens, a Diagnostic Breast Imager at Roswell Park Comprehensive Cancer Center. “It’s also a more sensitive mammogram for picking up small breast cancers.”Occasionally, the positioning of a woman’s breast during her mammogram will cause the breast tissue to overlap. When reviewing the images, that overlapping tissue can look similar to a mass within the breast. “With a 2D screening, if there’s a question of overlapping breast tissue, the patient will need to come back in for additional mammogram pictures. With the 3D screening, instead of having to repeat images for overlapping tissue, we can often see it clearly on the first screening,” says Dr. Quinn. “A 3D mammogram allows us to scroll through a mammogram like flipping through the pages of a book. It also adds another layer of confidence that you can scan through the tissue and see that there is no underlying mass.” One of the great features of 3D mammography is that each view is divided into multiple one-millimeter sections of the breast. She said this gives breast cancer less of a chance to hide and gives the doctors more information about the breast. Patients are less likely to need to return than with a 2D mammogram. According to a news release, 3D mammography finds 20 to 30 percent more cancers than 2D. One improvement of this new machine is instead of a flat surface that squishes the breast, it uses smart curve compression that conforms to the shape of the breast. Early detection allows patients to take advantage of improved surgery and chemotherapy options.
A number of studies have found that 3D mammograms find more cancers than traditional 2D mammograms and also reduce the number of false positives. A false positive is when a mammogram shows an abnormal area that looks like cancer but turns out to be normal. Breast cancers found with 3D mammography were more likely to be smaller and node-negative (meaning they had not spread to the lymph nodes) compared to breast cancers found with standard digital mammography, according to a study. The use of 3-D mammography may significantly reduce the number of women who undergo breast biopsy for a non-cancerous lesion following an abnormal mammogram, according to a new study published in the journal Radiology.
The mammogram and the cancer screening debate
The rate of false positives has helped fuel the ongoing debate about the value of screening mammograms, especially for women younger than 50. In October 2015, the American Cancer Society recommended that women at average risk of breast cancer start annual screening mammograms at age 45 (instead of 40).
“The issue for women ages 40 to 49 is that with conventional 2D mammography there are clearly too many false positives,” said Emily Conant, M.D., chief of breast imaging and professor of radiology at the University of Pennsylvania Medical Center and member of the Breastcancer.org Professional Advisory Board. “At the same time, we can’t even find some of the cancers on 2D mammography. Many of the false positives in this age group are because the mammogram is their first, or ‘baseline,’ with no earlier mammograms to compare it to so the radiologist can say, ‘Oh, that is the way her breasts have always been — this is just normal for her.’” Conant was one of the authors of a 2016 study that found the benefits of 3D mammograms last over time. “The findings reaffirmed that 3D mammography is a better mammogram for breast cancer screening,” she said.
How the study was done and results
The study compared the results of 3D mammograms and conventional 2D digital mammograms done on 96,269 women age40 to 74. The women had the screening mammograms between 2011 and 2014.
- 129,369 were conventional 2D digital mammograms
- 50,971 were 3D mammograms
The average age of women who had conventional 2D digital mammograms was 56.4 years. The average age of women who had 3D mammograms was 54.6 years.
Overall, the study found that screening with 3D mammography increased breast cancer detection rates by about 40%.
Also, 3D mammography found smaller invasive cancers that were more likely to be node-negative and HER2-negative compared to conventional 2D digital mammography:
- 73.7% of breast cancers found with 3D mammography were 1 centimeter (cm) or smaller and node-negative
- 65.4% of breast cancers found with digital mammography were 1 cm or smaller and node-negative
This difference in detecting small breast cancers was especially notable in women age 40 to 49. For these women, 3D mammography found 4.41 invasive cancers per 1,000 exams in women with nondense breasts compared to 2.71 invasive cancers per 1,000 exams found by conventional 2D digital mammography.
Screening with 3D mammography seemed to find breast cancers at an earlier, more treatable stage in these younger women. For women age 40 to 49:
- 25% of breast cancers detected with 3D mammography were considered to have a poor prognosis
- 40.4% of breast cancers detected with conventional 2D digital mammography were considered to have a poor prognosis
Screening with 3D mammography also reduced recall rates — the number of times women had to schedule follow-up appointments because of a suspicious area on a mammogram that turned out to be normal. Recall rates were 40% lower with 3D mammography compared to conventional 2D digital mammography.
“Our results support the evolving literature showing that screening with [3D mammography] simultaneously improves breast cancer detection while reducing false-positive recalls,” Conant and her colleagues wrote. “Although these smaller cancers may not have transformed into more aggressive subtypes, they are expected to be associated with better long-term prognosis.”
More studies supporting 3D Mammography
Another significant study supporting the accuracy of 3-D Mammography was published online on February 28 by JAMA Oncology.
A review of more than 170,000 screening mammograms using the two technologies determined that DBT — sometimes referred to as 3D mammography — did a better job at accurately detecting cancers in women of all ages. The advantages were most pronounced for women in their 40s. DBT was also better at finding cancers in women with high breast density, which can make cancers more difficult to spot on screening exams. High density indicates a larger proportion of active tissue in the breast and is a risk factor for breast cancer.
“This study contributes to what is already a fair amount of evidence that shows, particularly for younger women and women who have denser breasts, that DBT is probably a better screening test,” says Dr. Jennifer Haas, one of the study’s authors and a professor of medicine at Harvard Medical School.
A New Technology
DBT is a relatively new technology, approved by the FDA in 2011. It works by taking a series of images, which a computer then assembles into a 3D-like image of breast slices. Traditional digital mammography creates a two-dimensional image of a flattened breast, and the radiologist must peer through the layers to find abnormalities.
The study authors compared the two technologies using more than 50,000 breast screenings performed with DBT and 129,369 performed with digital mammography. The data represented more than 96,000 women (average age 54 to 56) screened at three different research centers from 2011 to 2014.
The study’s strengths are the large sample size and how it was designed to measure the experience of women in real clinical practice, says Dr. Haas.
“In contrast to participants in a clinical trial, this study examined the outcomes of women receiving care in a variety of clinical practices. It represents a group of women who are typical of those who get annual mammographic screenings,” she says.
Study authors found that DBT produced higher cancer detection rates and fewer unnecessary callbacks in women of all ages. But the technology performed particularly well on women in their 40s. In this group, DBT found 1.7 more cancers than digital mammography for every 1,000 exams of women with normal breast tissue. In addition, 16.3% of women in this age group who were screened using digital mammography received callbacks, versus 11.7% of those screened using DBT. For younger women with dense breasts, the advantage of DBT was even greater: 2.27 more cancers were found for every 1,000 women screened.
Women with high breast density have long represented a challenge for radiologists. Dense tissue and cancers both show up as white areas on screening mammograms, making it difficult for the radiologist reading the exam to distinguish between normal and abnormal tissue. Some radiologists have described looking for cancer on these images as trying to find a polar bear in a snowstorm.
DBT also outperformed digital mammography when it came to finding smaller cancers. When those smaller cancers were an invasive type, the cancers found by DBT were less likely to have already spread to neighboring lymph nodes. This was especially true for invasive cancers found in women ages 40 to 49.
It seems likely that finding invasive cancer before it spreads will mean a better long-term prognosis. But more research is needed to confirm this theory and to determine whether DBT produces better breast cancer outcomes than screening with digital mammography.
Who should get 3D mammograms, and at what age should they start them?
All women should get them, especially if they have dense breasts; about 50% of women do. The availability and popularity of 3D mammography have grown notably since the Food and Drug Administration (FDA) approved it in 2011.
Yearly screening should start at age 40 for patients with an average risk for breast cancer. Women with a gene mutation such as BRCA 1 or BRCA 2, or those with a strong family history of breast cancer, should consult with their physicians—but normally we recommend they get their first 3D mammograms at age 30.
Do women have to worry about false-positive results with 3D mammography?
False positives in breast imaging occur when a mammogram shows an abnormal area that turns out not to be a cancerous growth. With 2D mammography, 1 in 10 patients is recalled for something that may look suspicious and thus requires additional imaging. With 3D mammography, that happens less frequently.
What are the benefits for you?
Three-dimensional mammography technology seems to be being adopted faster throughout the United States than conventional 2D digital mammography was. According to 2018 statistics from the FDA, about 4,000 facilities out of 8,726 certified mammography facilities in the county offer 3D mammograms.
The results of this study offer more evidence that 3D mammograms find more cancers than traditional 2D mammograms, especially for younger women, and may help 3D mammography become part of routine breast cancer screening.
Benefits of using our current system at Advanced Women Imaging
The fight against breast cancer is not one-dimensional.
At Fujifilm, we are committed to doing our part, at every opportunity, to deliver value through imaging innovation. ASPIRE Cristalle with Digital Breast Tomosynthesis (DBT) is built smarter because it is built with insight into image quality, operational excellence, and better patient experience.
It’s time to get smarter about 3D mammography
ASPIRE Cristalle with Digital Breast Tomosynthesis (DBT) is built with insight into image quality, operational excellence, and better patient experience. Here’s why:
INSIGHT #1 Mammograms don’t work if women won’t get them.
The intelligent design of ASPIRE Cristalle’s patented Comfort Paddle provides noticeably less pain and anxiety for the patient. With its unique flexible, slotted 4-way tilting paddle design, it provides more even compression, that combined with the Intelligent Automatic Exposure Control (iAEC) image processing, make it possible to provide more optimized images at low dose for every breast type, including implants.
Radiologists using ASPIRE Cristalle with Digital Breast Tomosynthesis (DBT)
DBT will realize valuable, enhanced clinical efficacy compared to using full-field digital mammography (FFDM) alone.
- DBT acquires a series of low-dose images at different angles. The acquired images are reconstructed into a series of high-resolution slices displayed individually or dynamically in a cine mode.
- The reconstructed tomographic images make it easier to identify lesions that might otherwise be difficult to visualize in traditional 2D mammogram images because of the presence of overlapping breast structures.
- Superior diagnostic accuracy and superior (lower) recall rates for non-cancer cases are possible with ASPIRE Cristalle’s DBT technology.
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The information in this document does not replace a medical consultation. It is for personal guidance use only. We recommend that patients ask their doctors about what tests or types of treatments are needed for their condition.