Which layer of the CR imaging plate prevents unwanted light and background radiation from affecting the unprocessed latent image?

• A. Conductor layer
• B. Light Shield layer
• C. Support layer
• D. Color layer

Answer: (B)

The key idea is protecting the stored latent image from light and stray radiation. After x-ray exposure, the latent image sits in the phosphor layer and could be degraded if ambient light or other stray radiation reaches it before the plate is read. The light shield layer sits in place specifically to block that unwanted light, preventing premature release of stored energy and preserving image contrast until the plate is scanned by the reader. The other layers have different roles: the conductor layer helps dissipate static electricity and reduce related artifacts, the support layer provides mechanical stability, and the color layer influences optical properties but does not function as a barrier to light reaching the latent image.