Which statement describes the relationship between kVp and receptor exposure?

Which statement describes the relationship between kVp and receptor exposure?

• A. Indirect
• B. Directly proportional
• C. Direct, although not proportional
• D. Inverse

Answer: (C)

Raising kVp makes the X-ray beam more penetrating, so more photons reach the image receptor after passing through the patient. That means receptor exposure tends to increase as kVp goes up. However, the increase is not a fixed, proportional one because tissue attenuation is nonlinear and depends on photon energy, and changes in scatter and filtration affect how much energy actually contributes to the image. So receptor exposure does rise with kVp, but not in a strictly proportional way.

Raising kVp makes the X-ray beam more penetrating, so more photons reach the image receptor after passing through the patient. That means receptor exposure tends to increase as kVp goes up. However, the increase is not a fixed, proportional one because tissue attenuation is nonlinear and depends on photon energy, and changes in scatter and filtration affect how much energy actually contributes to the image. So receptor exposure does rise with kVp, but not in a strictly proportional way.