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PROLOGUE
The Imaging Boom
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Advanced medical imaging includes such technologies as computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET). These technologies clearly represent an unparalleled diagnostic advance, since they afford the chance to see into the body with relatively little risk. But as the papers in this section make clear, the equipment is proliferating and the volume of imaging exploding. Laurence Baker and colleagues observe that there are now more than 7,000 U.S. sites offering MRI, with state-of-the-art machines costing more than $2 million apiece. At Group Health Cooperative in Washington State, we learn from Rebecca Smith-Bindman and colleagues, MRI . . . [Full Text of this Article]

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