What does a higher kVp setting do to an X-ray image?

The correct answer highlights that a higher kilovolt peak (kVp) setting contributes to an increase in image density. In the context of X-ray imaging, density refers to the overall blackness or darkness of the radiographic film. When the kVp is increased, it enhances the penetrating power of the X-ray beam. This means that a greater number of X-rays reach the film or digital sensor, resulting in a darker image or higher density.

In addition to increasing density, an increase in kVp also tends to reduce image contrast, though this aspect is not highlighted in the correct answer but is important to understand. As kVp increases, the range of beam energies increases, which can cause a reduction in the difference between various tissue densities on the film, leading to a more uniform image rather than a sharply differentiated one.

Moreover, while higher kVp settings may affect radiation exposure, particularly in terms of reducing the amount of time the patient is subjected to radiation, the primary effect of a higher kVp is indeed the increase in image density. This knowledge is vital for dental nurses and radiographers when adjusting settings to obtain the best quality X-ray images while considering patient safety and image diagnostic criteria.