Radiopacity

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Overview

Radiopacity refers to the the relative inability of electromagnetism to pass through a particular material, particularly X-rays. Dense materials that prevent the passage of electromagnetic radiation are called 'radiopaque'. The term refers to the relative opaque white appearance in radiographic imaging, when passing x-rays through dense matter .

In modern medicine, radiopaque substances are those that will not allow X-rays or similar radiation to pass. Radiologic imaging has been revolutionized by radiopaque dyes, or contrast media, which can be passed through the bloodstream, the intestinal tract, or into the cerebral spinal fluid and utilized to highlight computed tomography (CT) or X-ray images. Radiopacity is one of the key considerations in the design of various devices such as guidewires or stents that are used during radiological intervention. The radiopacity of a given endovascular device is important since it allows the device to be tracked during the interventional procedure. The two main factors contributing to a material's radiopacity are density and atomic number.

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Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .