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Stereoscopic mammography could reduce recall rate
Date:11/13/2012

OAK BROOK, Ill. A new three-dimensional (3-D) digital mammography technique has the potential to significantly improve the accuracy of breast cancer screening, according to a study published in Radiology.

Two-dimensional (2-D) x-ray mammography, the current primary screening method for early detection of breast cancer in women, is a valuable tool but has some limitations. Surrounding normal tissue can mask lesions, and 2-D views do not provide direct information about the volumetric appearancemeaning the three-dimensional physical shapeof a detected lesion.

A novel technique called stereoscopic digital mammography (SDM) addresses these limitations by mimicking the way that human eyes work together to form a 3-D image. The technique uses digital mammography equipment that's been modified to allow the X-ray tube to move separately from the cassette. The resulting images are viewed on two monitors mounted one above the other.

"Our eyes see the world from two slightly different perspectives," said Carl J. D'Orsi, M.D., from the Department of Radiology and Imaging Sciences at Emory University School of Medicine and the Winship Cancer Institute at Emory University, both in Atlanta. "In this technique, the X-ray tube functions as the eyeball, with two different images providing slightly different views of the internal structure of the breast."

By using a unique workstation and polarizing lenses, SDM has the ability to identify lesions at different depths within the breast volume, potentially reducing both false positive findings and recalls while enabling more accurate diagnosis.

Dr. D'Orsi and colleagues recently compared SDM to 2-D digital mammography in 779 patients at elevated risk of developing breast cancer because of personal or family history. Patients received both exams in a single visit, and two experienced radiologists independently interpreted the final total of 1,298 exams. Imaging findings were cor
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Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

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