?:definition
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The patient is free from objective (e.g., reddened skin, blistering) and subjective (e.g., pain, tenderness, discomfort) indicators of injury due to energy given off by matter in the form of tiny fast-moving particles (alpha particles, beta particles, and neutrons) or pulsating electromagnetic rays or waves (gamma rays) emitted from the nuclei of unstable radioactive atoms. In the perioperative area patient\'s are exposed to ionizing, not non-ionizing, radiation.
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