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Nuclear Imaging
Nuclear imaging examines "aching bones" for fractures or diseases like leukemia, lymphoma, and other cancers. Patients are injected with a radioactive tracer which enters the bloodstream and passes in a matter of hours into the bones where it can be imaged by a "gamma camera." The resulting images reveal abnormalities in bones which are marked by non-uniform distribution of the tracer.
Image from Photo Researchers/Getty Images

Human Body Upgrades Photos

Learn about human body upgrades in the photo gallery.