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Dartmouth's alternative breast imaging techniques sort abnormal from normal tissue

HANOVER, NH Dartmouth physicians and engineers have published a paper with results from a five-year project testing three new imaging techniques to examine breast abnormalities, including cancer. The study finds that the new methods of electromagnetic imaging offer a high contrast and the ability to distinguish between healthy breast tissue and abnormal tissue. Their study appears in the May 2007 issue of Radiology, the journal of the Radiological Society of North America.

The interdisciplinary team includes researchers from Dartmouth's Thayer School of Engineering and Dartmouth Medical School working with experts at the Norris Cotton Cancer Center and the Department of Radiology at Dartmouth-Hitchcock Medical Center (DHMC). The electromagnetic techniques are electrical impedance spectral imaging (EIS), microwave imaging spectroscopy (MIS), and near infrared (NIR) spectral imaging.

A total of 150 women participated in this study, 97 of whom had an abnormal conventional breast image that was suspicious or highly suggestive of malignancy and were scheduled for a biopsy. The women with abnormal breast images underwent electromagnetic exams prior to biopsy. The researchers compared the abnormal area with the background breast tissue and with a mirror image area in the opposite breast and correlated the data with the biopsy findings. Further analysis led the researchers to determine that the new imaging techniques provided an increase in contrast between 150 to 200 percent to discriminate between breast cancer and benign tissue.

We put our new imaging techniques to the test to quantify their effectiveness, said Steven Poplack, associate professor of radiology and OB/GYN at Dartmouth Medical School, and co-director for breast imaging/mammography at DHMC, and the lead author of the paper. Our results show the potential power of using a variety of imaging techniques to get the best possible view of whats going on in the breast tissue. <
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Contact: Sue Knapp
sue.knapp@dartmouth.edu
603-646-3661
Dartmouth College
5-Jun-2007


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