In Computed Radiography, what device reads the phosphor plate after exposure?

In Computed Radiography, what device reads the phosphor plate after exposure?

• A. Laser
• B. Scanner
• C. Photomultiplier
• D. CCD

Answer: (A)

In computed radiography, the image on the storage phosphor plate is retrieved by scanning the plate with a laser. The laser stimulates the trapped energy in the phosphor, causing it to emit light. That emitted light is then detected and converted into an electrical signal by the detector system inside the scanner (with the photomultiplier as the light detector), and this signal is processed into the digital image. The laser is the active reading step because it provides the precise stimulation needed to read out the stored image from the plate; without the laser, the stored information wouldn’t be released for digitization.

In computed radiography, the image on the storage phosphor plate is retrieved by scanning the plate with a laser. The laser stimulates the trapped energy in the phosphor, causing it to emit light. That emitted light is then detected and converted into an electrical signal by the detector system inside the scanner (with the photomultiplier as the light detector), and this signal is processed into the digital image. The laser is the active reading step because it provides the precise stimulation needed to read out the stored image from the plate; without the laser, the stored information wouldn’t be released for digitization.