Question
Negative Contrast Media
Answer :
Word Count : 327
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Negative contrast media are substances used in diagnostic imaging to enhance the visibility of internal structures by creating areas of lower radiographic density compared to surrounding tissues. Unlike positive contrast agents, which appear white or radiopaque on radiographs due to high atomic number elements like iodine or barium, negative contrast media appear darker or radiolucent because they are less dense than the surrounding tissues. Their primary function is to provide contrast by displacing tissue density, allowing better delineation of organ outlines and hollow structures. Common negative contrast agents include gases such as
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