Optimum contrast in film-based radiographs is achieved by:

Optimum contrast in film-based radiographs is achieved by optimizing the kilovoltage peak (kVp) settings. The kilovoltage peak directly affects the quality and contrast of the radiographic image. When the kVp is set at an appropriate level, it influences the penetration power of the X-rays, enabling better differentiation between various tissues. Higher kVp levels can produce images with lower contrast, while lower kVp levels tend to generate images with higher contrast but may sacrifice the ability to visualize structures adequately.

By carefully selecting the kVp, radiographers can enhance the visibility of the anatomical details required for accurate diagnosis, thus achieving the desired level of contrast in the radiograph. This ensures that different tissue types are distinguishable, which is essential for effective interpretation of the images.