Quality Control in Computed Radiography

Which of the following correctly describes the relationship between luminescence and radiation exposure in a CR system?

• Luminescence is inversely proportional to radiation exposure

• Luminescence has no relationship with radiation exposure

• Luminescence is directly proportional to radiation exposure

• Luminescence depends solely on the type of laser used

In the Imaging Plate (IP), what is the approximate thickness range of the phosphor layer that stores the latent image?

• 5-10 micrometers

• 100-300 micrometers

• 500-1000 micrometers

• 10-20 micrometers

What is the primary function of the workstation in the CR Image Display System?

• To scan the imaging plate

• To provide tools for analyzing, manipulating, and interpreting digital images

• To convert digital images into hard copy films

• To erase the residual latent image from the imaging plate

Which layer in the Imaging Plate construction acts as the backbone and provides mechanical strength?

• Reflective Layer

• Supportive/Base Layer

• Backing Layer

• Conductive Layer

What is one of the primary reasons for image artifacts caused by static discharge in a CR system?

• Improper laser scanning

• Absence or malfunction of the conductive layer in the Imaging Plate

• Use of low-resolution monitors in the Image Display System

• Overheating of the Laser Printer

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