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On a CT scan, density refers to the degree of attenuation of X-rays as they pass through different tissues in the body, which is represented in Hounsfield Units (HU). Denser tissues, such as bone, appear brighter (higher HU values), while less dense tissues, like air or fat, appear darker (lower HU values). This variation in density helps radiologists differentiate between various types of tissues and identify abnormalities or conditions within the body.

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2mo ago

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