A region of a radiograph showing increased exposure, either because of greater transradiancy of the corresponding portion of the subject or because of inhomogeneity in the source of radiation, such as off-center positioning.

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ra·dio·lu·cen·cy .rād-ē-ō-'lüs-ən-sē n, pl -cies the quality or state of being radiolucent

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ra·dio·lu·cen·cy (ra″de-o-looґsən-se) the property of being radiolucent.

Medical dictionary. 2011.

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