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This story is from the category Display Technology
Date posted: 08/08/2010 Computed tomography --or CT--scans have become a powerful imaging tool for diagnosing disease. Health-care providers performed more than 70 million CT scans in the United States in 2007. A December 2009 study in the Archives of Internal Medicine calculated that those 70 million scans could lead to 29,000 cancers. That figure is a statistical calculation and "there is no direct evidence linking the radiation dose from CT scans to cancer," says Cynthia McCollough, a radiological physicist at the Mayo Clinic. "Doses delivered in a CT scan are of the same magnitude that we get every year from background radiation." (A typical CT scan might result in a dose of one to 14 millisieverts. ) Nevertheless, the CT community is looking for ways to reduce the radiation dose from scanners. This is because CT scans are becoming more common, and because multiple scans are often required for some patients such as those suffering from head or spine trauma . Some promising techniques for reducing CT scan radiation were recently presented at the meeting of the American Association of Physicists in Medicine in Philadelphia. See the full Story via external site: www.technologyreview.com Most recent stories in this category (Display Technology): 22/05/2013: Penn Engineers’ Nanoantennas Improve Infrared Sensing |
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