Which term describes substances that appear white on x-ray?

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Multiple Choice

Which term describes substances that appear white on x-ray?

Explanation:
On X-ray images, brightness reflects how much X-rays are absorbed by the material. Substances that are radiopaque block many X-rays and appear white or light on the image. This is why bones and metal implants look white. In contrast, radiolucent substances let X-rays pass through more easily and appear darker. Ultrasound terms like hyperechoic and isoechoic describe brightness in ultrasound, not X-ray attenuation, so they don’t apply to how something appears on an X-ray. So a substance that appears white on X-ray is radiopaque.

On X-ray images, brightness reflects how much X-rays are absorbed by the material. Substances that are radiopaque block many X-rays and appear white or light on the image. This is why bones and metal implants look white. In contrast, radiolucent substances let X-rays pass through more easily and appear darker. Ultrasound terms like hyperechoic and isoechoic describe brightness in ultrasound, not X-ray attenuation, so they don’t apply to how something appears on an X-ray. So a substance that appears white on X-ray is radiopaque.

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