Which color does negative contrast appear on imaging?

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Multiple Choice

Which color does negative contrast appear on imaging?

Explanation:
Negative contrast means areas that absorb fewer X-rays, so they show up darker on the image. Air and other gases are classic negative contrast media; their low density makes them radiolucent, producing black, or the darkest, regions on radiographs and CT displays. In contrast, positive contrast agents like barium or iodine are dense and appear white because they absorb more X-rays. Red and green aren’t used to represent density in standard imaging, and white would indicate a dense or contrast-filled area rather than negative contrast.

Negative contrast means areas that absorb fewer X-rays, so they show up darker on the image. Air and other gases are classic negative contrast media; their low density makes them radiolucent, producing black, or the darkest, regions on radiographs and CT displays. In contrast, positive contrast agents like barium or iodine are dense and appear white because they absorb more X-rays. Red and green aren’t used to represent density in standard imaging, and white would indicate a dense or contrast-filled area rather than negative contrast.

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