What is the result of using low kVp in terms of image contrast?

Using low kilovolt peak (kVp) settings during radiographic imaging results in a short scale of contrast. This is because lower kVp values produce higher contrast images due to the greater degree of photoelectric absorption relative to Compton scattering, which occurs at lower energies. The short scale of contrast means that there will be more pronounced differences between the various shades of gray, resulting in a more distinct and clear image for structures of differing densities.

When kVp is decreased, fewer x-rays penetrate through denser tissues, leading to increased differentiation in the image. Therefore, anatomical structures that vary in density will appear more distinctly, providing a high level of visibility for features that are important for interpretation in diagnostic imaging.

In contrast, higher kVp settings would result in a long scale of contrast, where there is more gradual variation in density and fewer stark differences between adjacent structures, leading to a more uniform appearance. Hence, using low kVp is essential for enhancing the quality of images where fine detail and contrast are necessary for accurate assessment.