What is produced when using high kVp resulting in low contrast?

Using high kilovolt peak (kVp) settings in radiography results in longer-scale contrast. High kVp techniques increase the penetrating power of the x-rays, allowing them to travel through denser anatomical structures. This leads to a greater range of gray shades on the radiographic image, as the differences in attenuation among various tissues become less pronounced.

The term "long-scale contrast" refers to the gradual transition between shades of gray, providing a wider range of densities in the image. This is particularly useful in areas with minimal differences in tissue density, such as the abdomen, where soft tissues may not display significant contrast at lower kVp settings. In contrast, lower kVp would yield a shorter scale of contrast, as it would highlight the differences between tissues more sharply, resulting in a limited number of distinct shades.

Thus, using high kVp produces long-scale contrast, making it the correct answer.