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Definition: the range of CT numbers (in Hounsfield units) included in the gray scale video display of the CT image, ranging from 1 to 2000 or 3000, depending on the type of machine. Also, the range of electromagnetic energies passed by an electronic screening module of an imaging device, as by a scintillation camera.

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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