CR Plate Reader Components & Functions

Components of CR Plate Reader

• Laser

  • A red helium-neon laser is utilized in the CR plate reader.
  • Its primary function is to scan the imaging plate (IP) to release stored energy embedded within it.

• Beam Shaping Optics

  • This component ensures that the laser beam maintains a consistent shape and size while scanning the IP.%0A

• Mirror

  • A mirror in the system changes the direction of the laser beam, guiding it toward the imaging plate (latent image).

• Light Emission

  • Excited electrons release blue light as they return to their normal energy levels.
  • This phenomenon is known as photostimulated luminescence (PSL).

• Light Collecting Optics

  • This part funnels and collects the emitted light from the imaging plate and directs it toward the photodetector.

• Filter

  • The filter component plays a crucial role by eliminating noise.
  • It removes unwanted light wavelengths that may interfere with image quality.

• Photodetector / Photomultiplier Tube (PMT)

  • The photodetector, also known as the photomultiplier tube, is responsible for converting the collected light into an electrical signal for the purpose of image processing.

• Analog to Digital Converter (ADC)

  • This component converts the electrical signal generated by the photodetector into digital data, represented in numerical form.

• Erasure

  • The imaging plate must undergo an erasure process where it is exposed to bright white light.
  • This step serves to remove any residual image from the plate before it can be reused for new imaging purposes.