More x-rays results in what?

• A. No change
• B. Lower voltage
• C. Increased color depth
• D. Higher voltage

Answer: (D)

Increasing the X-ray exposure means more photons reach the detector, making the image brighter. The setting that controls how many photons are produced and how penetrating they are is the tube voltage. Raising the voltage increases the energy of the emitted photons and improves their ability to pass through tissue, which boosts the photon flux reaching the detector. That’s why higher voltage is the best answer: it directly drives the beam’s energy and quantity, leading to more x-ray exposure on the image. The other options don’t fit: color depth isn’t a factor in X-ray imaging, and a higher exposure would not result from no change; lowering the voltage would reduce both photon energy and the number of photons, decreasing exposure.