To achieve higher image contrast, what should be done during radiography?

To achieve higher image contrast in radiography, decreasing the kilovolt peak (kVp) while simultaneously increasing the exposure time is effective. Lowering the kVp reduces the overall energy of the x-rays produced, which leads to an increase in the differential absorption of the x-rays by various tissues. As a result, the contrast between different structures on the radiograph becomes more pronounced.

Doubling the exposure time compensates for the reduction in the kVp, ensuring that enough radiation reaches the film or digital sensor to produce a diagnostic-quality image. This combination enhances the visibility of structures, particularly in areas where subtle differences in density and composition are critical for accurate diagnosis.

The other options would not produce optimal contrast levels. For instance, increasing kVp generally decreases image contrast since it tends to penetrate tissues more uniformly, resulting in a more homogenous image. Likewise, adjusting exposure time without matching it properly with kVp changes may compromise image quality and diagnostic utility.