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What are contrast materials and which are available?

Contrast Media (1): A very basic introduction
Carmen Lobitz
Contrast Media
Contrast media improve the pictures produced by x-rays, computed tomography, magnetic resonance imaging, and ultrasound. Robert Kneschke – Fotolia
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Distinguishing normal from abnormal conditions in internal organs, contrast materials, also called contrast agents or contrast media are used.

They enhanceetwas verbessern the contrast and improve the pictures produced by x-rays, computed tomography (CT), magnetic resonance (MRI) imaging, and ultrasound. After body insertiondas Einführen (before the examination), they let certain body structures on the images appear differently dark/light as without contrast material.

Contrast material can be applied to patients in three ways:

  • taken by mouth/orally – swallowedgeschluckt
  • given rectallyreaktalenemader Einlauf
  • injected into a vein or artery.


There are several types of contrast materials:

  • Iodine-based and barium-sulfate (powder which is mixed with water before administration, liquid, paste or tablet) compounds are used in x-ray and computed tomography (CT) imaging exams.
  • Gadolinium is the key component of a contrast material,…

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