Which term best describes a white area on an X-ray caused by high X-ray absorption?

Which term best describes a white area on an X-ray caused by high X-ray absorption?

• A. Radiolucency
• B. Radiopacity
• C. Density
• D. Brightness

Answer: (B)

High X-ray absorption creates white areas on a radiograph, a property called radiopacity. When a structure absorbs more X-rays, less radiation reaches the detector, so that area appears lighter or white on the image. Dense materials like enamel, dentin, and bone are radiopaque for this reason. Radiolucent regions, by contrast, allow more X-rays to pass through and appear darker. Density is a broader term for how dark or light an image is overall, not specifically describing a white area caused by absorption, while brightness is a digital image display term and doesn’t pinpoint the physical interaction of X-rays with matter.

High X-ray absorption creates white areas on a radiograph, a property called radiopacity. When a structure absorbs more X-rays, less radiation reaches the detector, so that area appears lighter or white on the image. Dense materials like enamel, dentin, and bone are radiopaque for this reason. Radiolucent regions, by contrast, allow more X-rays to pass through and appear darker. Density is a broader term for how dark or light an image is overall, not specifically describing a white area caused by absorption, while brightness is a digital image display term and doesn’t pinpoint the physical interaction of X-rays with matter.