Nuclear medicine emerged in the late 19th century with the discovery of radioactivity, which is now widely used in both diagnostic imaging and therapeutics. A vital tool in nuclear medicine is the gamma camera, sometimes referred to as the scintillation camera (see Image. Gamma Camera). In addition, other critical instruments used in nuclear medicine include positron emission tomography (PET) cameras, single-photon emission computed tomography (SPECT) systems, and various detectors and counters.
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