Already, MRI machines, which weigh several tons and can fill up an entire room, have been miniaturized to about a foot, and will eventually be as small as a cell phone. By passing one over your body, you will be able to see inside your organs. Computers will process these 3-D images and then give you a diagnosis. This probe will also be able to determine, within minutes, the presence of a wide variety of diseases, including cancer, years before a tumor forms. This probe will contain DNA chips, silicon chips that have millions of tiny sensors that can detect the presence of the telltale DNA of
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