The active portion(s) of a CR IP is (are):

The active portion(s) of a CR IP is (are):

• A. ABC
• B. PSP
• C. DQE
• D. SNR

Answer: (B)

In computed radiography, the active portion of the imaging plate is the photostimulable phosphor layer. This layer stores energy from x-ray exposure by trapping electrons in metastable states, creating a latent image. When the plate is read, a laser scans the PSP layer, and the trapped energy is released as light (photostimulated luminescence). The emitted light is then captured and converted into a digital signal to form the image. The other terms—SNR and DQE—describe image quality metrics, not physical layers of the plate, and automatic brightness control is a system function, not the plate’s active material.

In computed radiography, the active portion of the imaging plate is the photostimulable phosphor layer. This layer stores energy from x-ray exposure by trapping electrons in metastable states, creating a latent image. When the plate is read, a laser scans the PSP layer, and the trapped energy is released as light (photostimulated luminescence). The emitted light is then captured and converted into a digital signal to form the image. The other terms—SNR and DQE—describe image quality metrics, not physical layers of the plate, and automatic brightness control is a system function, not the plate’s active material.