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Researchers are looking to recruit more than 6,300 Canadian women in the first large North American study of its kind to determine whether 3D mammography is more effective at detecting breast cancer than the 2D technology currently used.
51-74% dense tissue | Category C | Heterogeneously dense The breasts have consistently distributed areas of fibrous and glandular tissue, making it hard for small masses to be detected by mammogram.
75% and above dense tissue | Category D | Extremely dense breasts The breasts have a lot of fibrous and glandular tissue, making it even harder for a cancerous tumor to be detected by mammogram.
Previous studies have suggested that the 3D technology can detect up to 40 per cent more breast cancers than 2D mammography, said Dr. Seely also said that 2D imaging can miss about 15 per cent of cancers or give women false positives.
Jean Seely, the lead investigator at the Ottawa Hospital Breast Health Centre. For every 100 women who are called back for more tests after a 2D mammogram detects something suspicious, more than 90 of them will have a normal finding or a benign growth.
Percentages (0-100%), letters (A, B, C, D) or words can be used.
UNDER 25% dense tissue | Category A | Almost entirely fatty The breasts have little fibrous and glandular tissue and are mostly fat. 25%-50% dense tissue | Category B | Scattered areas of fibroglandular density The breasts have scattered areas of fibrous and glandular tissue, but also quite a bit of fat.Finley, who is now awaiting the results of a biopsy, told CTV Ottawa she’s not worried. Women who wish to participate at one of the locations in Vancouver, Toronto or Ottawa need to be referred by their doctor.To join the study, women must be 40 or older, already scheduled for a screening mammogram, have no symptoms or history of breast cancer and no breast implants.More information about the study and eligibility criteria is available here.A radiologist compares an image from a 2-D technology mammogram to 3-D Digital Breast Tomosynthesis mammography in Wichita Falls, Tex., on Tuesday, July 31, 2012.“This high number of initial false positives creates stress for women and may lead to decreased screening use, with a potential greater loss of lives from undetected cancer,” researchers said in a news release.With the new study, doctors are hoping to “detect the cancers that are aggressive (and) potentially lethal at an earlier stage,” Dr. She and her colleagues are hoping to recruit 2,000 women from the Ottawa area as part of the larger study. She’s already had her 3D mammogram, which detected a very small, suspicious lump.A screening mammogram is a regular check-up for breast health in the absence of adverse symptoms.It is an important detection tool as it monitors changes to your breasts over time, which can help find cancer in its earliest stage.It is a low-dose x-ray important to help identify growths that may be too small for you or your doctor to detect.All mammography images at Canada Diagnostic Centres are digital (DR), providing sharp, detailed images.