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Energy released in the form of particle or electromagnetic waves. Common sources of radiation include radon gas, cosmic rays from outer space, medical x-rays, and energy given off by a radioisotope (unstable form of a chemical element that releases radiation as it breaks down and becomes more stable).


MetroWest Medical Center provides advanced medicine and personalized care, right here in your community.

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The Center for Heart & Vascular Services. At the forefront of heart and vascular disease for more than 25 years.

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