FPC 2 Exam 1 Practice

What does a photostimulable phosphor store during X-ray exposure?

Light energy Heat X-ray energy Electrical charge

Correct Answer:

X-ray energy

Explanation:

When the photostimulable phosphor is exposed to X-rays, the photons transfer their energy to the phosphor and create traps in the crystal lattice where electrons can be held. This stores the energy from the X-ray exposure as trapped electrons, forming a latent image. Later, scanning with a laser releases those trapped electrons, and the released energy appears as light to read the image. So the energy stored during exposure is the energy from the X-rays themselves, captured as trapped electronic states in the phosphor.

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