18 Questions
What term includes both computed radiography (CR) and direct radiography (DR)?
Digital radiography
When did digital radiography enter the medical field?
1970s
What company introduced the first CR systems in the US?
Fuji
What is the main component of CR imaging plates?
Barium fluorohalide crystals
What is the purpose of europium doping in CR imaging plates?
To create defects in the barium fluorohalide crystals
What is the function of the CR reader?
To scan the imaging plate with a high-intensity laser beam
What is the outcome of exposing a CR imaging plate to the exit beam?
A latent image is formed on the CR plate
What is the purpose of the CR workstation?
To process the digitized signal
What type of laser beam is used to scan the CR imaging plate?
Red light
What is the purpose of exposing the CR plate to a bright white light after use?
To remove any residual energy and prevent a ghost image
What is the result of incomplete clearing of the CR plate?
A ghost image remains on the CR plate
What is the function of the Analog-to-Digital Converter (ADC) in CR processing?
To convert the electronic signal from the PMT into a digital signal
What is the effect of not recognizing the collimated borders during image data analysis?
The image data analysis will include all data outside the collimation
What is the purpose of using a fiber optic light guide in CR processing?
To collect and send the blue-green light to the PMT
What is the effect of scatter radiation on the CR plate?
It reduces the brightness and contrast of the final image
What is the purpose of the workstation in CR processing?
To allow for post-processing image manipulation
Why should CR plates be erased after 48 hours of non-use?
To prevent background and scatter radiation from affecting the plate
What is the process called when the laser stimulates the movement of trapped electrons back to their original position?
Light-stimulated phosphorescence
Learn about the history and development of digital radiography, including computed radiography (CR) and direct radiography (DR). Discover how digital radiography entered the medical field and how CR systems evolved over time.
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