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scan (skan)

A picture of structures inside the body. Scans often used in diagnosing, staging, and monitoring
disease include liver scans, bone scans, and computed tomography (CT) or computerized axial
tomography (CAT) scans and magnetic resonance imaging (MRI) scans. In liver scanning and
bone scanning, radioactive substances that are injected into the bloodstream collect in these
organs. A scanner that detects the radiation is used to create pictures. In CT scanning, an x-ray
machine linked to a computer is used to produce detailed pictures of organs inside the body. MRI
scans use a large magnet connected to a computer to create pictures of areas inside the body.

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