This illustration shows a device made by MammoSite used to deliver targeted doses of radiation as part of brachytherapy.
Courtesy Radiological Society of North America
April 9, 2012 The use of brachytherapy is gaining popularity, but some medical experts worry that not enough research has been done to make sure it works as well as the traditional approach to radiation.
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A sign at Chicago's Midway Airport informs travelers about the millimeter wave scanners used to screen passengers.
Scott Olson/Getty Images
July 21, 2011 Over the next few months the Transportation Security Administration says it will retrofit 241 of its 488 airport scanners with software that's so unrevealing anybody, including passengers, can look at the pictures.
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