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The second leading cause of death in the U.S. in 2007 was
Radioactive Isotope
An isotope of an element that has an unstable nucleus and emits radiation during its decay to a stable form.
Fluorodeoxyglucose
A radioactive tracer used in positron emission tomography (PET) imaging to observe metabolic processes in the body.
Positrons
Antiparticles of electrons, possessing the same mass as an electron but with a positive charge.
Photon-Emission Tomography
A nuclear medicine imaging technique that produces 3D images of functional processes in the body by detecting pairs of gamma rays emitted indirectly by a positron-emitting radionuclide.
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