Radiopacity

Radiopacity

Radiopacity refers to 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.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • radiopacity — See radiopaque. * * * …   Universalium

  • radiopacity — noun a) the state of being opaque to X rays b) a measure of this state …   Wiktionary

  • radiopacity — The x ray shadow of a radiopaque object. SYN: radiodensity. * * * ra·di·opac·i·ty .rād ē ō pas ət ē n, pl ties the quality or state of being radiopaque * * * ra·di·opac·i·ty (ra″de o pasґĭ te) the property of being radiopaque …   Medical dictionary

  • radiopacity — n. impermeability to radiation, quality of not allowing radiation to pass through …   English contemporary dictionary

  • radiopacity — ra·di·opacity …   English syllables

  • radiopacity — noun opacity to X rays or other radiation • Syn: ↑radio opacity • Derivationally related forms: ↑radiopaque • Hypernyms: ↑opacity * * * ˌrādē+ noun Etymology: radio + opacity …   Useful english dictionary

  • radiopaque — radiopacity /ray dee oh pas i tee/, n. /ray dee oh payk /, adj. opaque to radiation; visible in x ray photographs and under fluoroscopy (opposed to radiotransparent). Cf. radiolucent. [1925 30; RADI(O) + OPAQUE] * * * …   Universalium

  • radiodensity — SYN: radiopacity. * * * ra·dio·den·si·ty den(t) sət ē n, pl ties RADIOPACITY * * * ra·dio·den·si·ty (ra″de o denґsĭ te) radiopacity …   Medical dictionary

  • Glass ionomer cement — A Glass Ionomer Cement (GIC) is one of a class of materials commonly used in dentistry as filling materials and luting cements. These materials are based on the reaction of silicate glass powder and polyalkeonic acid. These tooth coloured… …   Wikipedia

  • Radiopaque — Anything that does not let X rays or other types of radiation penetrate. Radiopaque objects block radiation. They are opaque to radiation. A metal object, for example, is typically radiopaque. If a child swallows a coin and it goes down into the… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”