Large signal differences in the remnant beam produce an image with which characteristic?

• A. High image contrast
• B. High spatial resolution
• C. Low spatial resolution
• D. Low image contrast

Answer: (A)

Contrast in radiography comes from how differently tissues attenuate the X-ray beam. When there are large differences in the remnant beam across the image, those differences show up as a wide range of brightness on the detector, producing high image contrast. That means bones and other dense structures stand out clearly against surrounding tissues because their transmitted intensities are very different. Spatial resolution, on the other hand, is about how well small details are depicted and depends mainly on factors like focal spot size and detector sampling, not on the magnitude of signal differences. If the remnant beam differences were small, image contrast would be low, making boundaries harder to see.