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'Stereo' mammography takes breast imaging to a new dimension
Date:11/28/2007

CHICAGO Stereoscopic digital mammography, a new diagnostic technique capable of producing three-dimensional, in-depth views of breast tissue, could significantly reduce the number of women who are recalled for additional tests following routine screening mammography. Results of a clinical trial being conducted at Emory University Breast Clinic in Atlanta were presented today at the annual meeting of the Radiological Society of North America (RSNA).

Standard mammography is one of the most difficult radiographic exams to interpret, said David J. Getty, Ph.D., division scientist at BBN Technologies of Cambridge, Mass. In a two-dimensional image of the breast, subtle lesions may be masked by underlying or overlying normal tissue and thus be missed, and normal tissue scattered at different depths can align to mimic a lesion, leading to false-positive detections.

Stereoscopic digital mammography consists of two digital x-ray images of the breast acquired from two different points of view separated by about eight degrees. When the images are viewed on a stereo display workstation, the radiologist is able to see the internal structure of the breast in three dimensions. In the ongoing clinical trial, researchers use a full-field digital mammography unit modified to take stereo pairs of images. The workstation enables the mammographer to fuse the stereo image pair and to view the breast in depth.

Stereo viewing is the only way to see the structure within the breast volume in true depth, said Dr. Getty, who has been working on the development of the technology over the past 12 years.

As of July 2007, 1,093 patients at elevated risk for developing breast cancer were enrolled in the trial. Each patient received a full-field, standard digital mammography screening examination and a full-field, stereoscopic digital exam, which were then read independently by different radiologists.

A total of 259 suspicious findings were detecte
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Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

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