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New 3-D colonoscopy eases detection of precancerous lesions
Date:7/31/2013

Cambridge-- MIT researchers have developed a new endoscopy technology that could make it easier for doctors to detect precancerous lesions in the colon. Early detection of such lesions has been shown to reduce death rates from colorectal cancer, which kills about 50,000 people per year in the United States.

The new technique, known as photometric stereo endoscopy, can capture topographical images of the colon surface along with traditional two-dimensional images. Such images make it easier to see precancerous growths, including flatter lesions that traditional endoscopy usually misses, says Nicholas Durr, a research fellow in the Madrid-MIT M+Vision Consortium, a recently formed community of medical researchers in Boston and Madrid.

"In conventional colonoscopy screening, you look for these characteristic large polyps that grow into the lumen of the colon, which are relatively easy to see," Durr says. "However, a lot of studies in the last few years have shown that more subtle, nonpolypoid lesions can also cause cancer."

Durr is the senior author of a paper describing the new technology in the Journal of Biomedical Optics. Lead author of the paper is Vicente Parot, a research fellow in the M+Vision Consortium. Researchers from Massachusetts General Hospital (MGH) also participated in the project.

In the United States, colonoscopies are recommended beginning at age 50, and are credited with reducing the risk of death from colorectal cancer by about half. Traditional colonoscopy uses endoscopes with fiber-optic cameras to capture images.

Durr and his colleagues, seeking medical problems that could be solved with new optical technology, realized that there was a need to detect lesions that colonoscopy can miss. A technique called chromoendoscopy, in which a dye is sprayed in the colon to highlight topographical changes, offers better sensitivity but is not routinely used because it takes too long.

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Contact: Andrew Carleen
acarleen@mit.edu
617-253-1682
Massachusetts Institute of Technology
Source:Eurekalert

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