Which two of the following are controlled by kilovoltage peak (kVp)? Select two.

Kilovoltage peak (kVp) plays a critical role in the production of x-rays in radiography. One of the primary functions of kVp is to determine the energy of the x-ray photons produced.

When kVp is increased, the energy of the x-ray beam is greater, which improves the beam quality. This enhancement in beam quality leads to a higher penetration capability, allowing the x-rays to travel through denser tissues more effectively. This is fundamental for diagnostic imaging, as it contributes to the formation of clearer and more diagnostic images.

In addition to beam quality, kVp also influences image contrast. Higher kVp settings result in lower contrast images, as there is a greater range of x-ray energies produced, leading to more uniform penetration of various tissues. Conversely, lower kVp settings yield higher contrast images because fewer energies are present, enhancing the visual differentiation between various tissues in the resulting radiograph.

Thus, kVp directly affects both beam quality and image contrast, making these two choices correct in relation to the functions of kilovoltage peak in radiographic imaging.