Which term describes areas that appear dark on radiographs due to low attenuation?

Which term describes areas that appear dark on radiographs due to low attenuation?

• A. Hyperattenuation
• B. Hypoattenuation
• C. Radiopaque
• D. Radiolucent

Answer: (D)

On X-ray images, brightness reflects how much the tissue attenuates the X-ray beam: less attenuation lets more rays through and appears darker. The term for these darker areas is radiolucent. Radiopaque describes dense areas that appear white due to high attenuation, while hyperattenuation refers to very high attenuation and very bright areas, and hypoattenuation is a relative decrease in attenuation (often used in other imaging contexts). For dark regions caused by low attenuation, radiolucent is the correct descriptor.

On X-ray images, brightness reflects how much the tissue attenuates the X-ray beam: less attenuation lets more rays through and appears darker. The term for these darker areas is radiolucent. Radiopaque describes dense areas that appear white due to high attenuation, while hyperattenuation refers to very high attenuation and very bright areas, and hypoattenuation is a relative decrease in attenuation (often used in other imaging contexts). For dark regions caused by low attenuation, radiolucent is the correct descriptor.