Computed Radiography Quiz

Which of the following layers in the Imaging Plate enhances the efficiency of light collection by reflecting emitted light towards the photodetector?

• Protective Layer

• Reflective Layer

• Conductive Layer

• Backing Layer

The phosphor material commonly used in Computed Radiography imaging plates is:

• Calcium Tungstate

• Barium Fluorohalide doped with Europium

• Selenium Photoconductor

• Cesium Iodide with Thallium

In CR systems, the principle of Photo-Stimulable Luminescence (PSL) is used to:

• Capture X-ray photons and convert them directly into electrical signals

• Absorb X-ray photons, store energy, and release it as luminescence when stimulated by laser

• Amplify X-ray photon energy to increase image resolution

• Minimize scattered radiation during image acquisition

Which component in a CR Reader converts the light signal from the phosphor plate into an electrical signal?

• Laser Scanning System

• Photomultiplier Tube (PMT) or CCD Sensor

• Analog-to-Digital Converter (ADC)

• Light Collection System

What is the purpose of the erasure system in a CR reader?

• To enhance the contrast of the image

• To clean the imaging plate from physical debris

• To remove any residual latent image from the plate using high-intensity white light

• To scan and digitize the imaging plate

In a CR cassette, which layer reduces backscatter radiation to improve image quality?

• Antistatic Layer

• Foam or Cushioning Layer

• Lead Backing Layer

• Identification Area

Which of the following statements about dry laser printers used in CR systems is FALSE?

• They use heat to activate the emulsion on the film

• They require chemical processing for film development

• They convert digital data into laser pulses to create images

• They are environmentally friendly compared to wet printers

Which of the following best describes the role of PACS in a CR system?

• It converts analog signals into digital images

• It archives, retrieves, and shares digital radiographic images across systems

• It erases latent images on imaging plates

• It produces hard copy films from digital images

Which material is typically used in the conductive layer of the CR Imaging Plate to prevent static buildup?

• Titanium Dioxide

• Carbon Black or Conductive Polymer (PANI, Ppy)

• Barium Fluorohalide

• Polyurethane

One of the disadvantages of Computed Radiography (CR) compared to Direct Radiography (DR) is:

• It requires more radiation dose

• It provides lower resolution images and has slower workflow

• It cannot be integrated with PACS

• It cannot reuse imaging plates