scattered xeroradiography

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Selenium — (pronEng|səˈliniəm) is a chemical element with the atomic number 34, represented by the chemical symbol Se, an atomic mass of 78.96. It is a nonmetal, chemically related to sulfur and tellurium, and rarely occurs in its elemental state in nature … Wikipedia
Radiography — Film records (radiographs) of internal structures of the body. Radiography is made possible by X rays (or gamma rays) passing through the body to act on a specially sensitized film. * * * Examination of any part of the body for diagnostic… … Medical dictionary

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