Computed radiography Flashcards
How is computed radiography done?
The cassette is placed in the reader which removes scans and erases the image and reinserts it in the cassette.
The reader uses red laser light to scan the plate and cause latent image electrons trapped within it to fluoresce and so light is produced.
The light energy is gathered by the reader photomultipler and converted to a digital signal.
This signal is then sent to a computer which displays the image on a monitor.
How is direct radiography done?
Requires a special DR plate that converts the light to a digital signal directly without requiring a reader.
The most reliable plates are coated with amorphous silicone and are like a large single computer chip
Costs double the price of a CR system
What are the benefits of using direct radiography?
real time image
Highest quality of digital images
Zoom facility allows areas to be magnified
Orthopaedics benefical
change is animals condition and ealing process can be accurately views
