How Computed Radiography and Digital Radiography Have Evolved

June 15, 2016 | Evaluations & Guidance

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General radiography has gradually, but irrepressibly, shifted from film (analog) to digital technology. Digital technology offers many advantages, such as consistent image quality and easier access to images through picture archiving and communication systems (PACS).

Two general types of digital systems are currently used; these are generically known as computed radiography (CR) systems and digital radiography (DR) systems. CR detection is achieved with image plates that are placed into standard-size portable cassettes. Following an exposure, the cassette is physically carried to an image plate reader, similarly to the way a film cassette is carried to a film processor. The resulting image is displayed about 30 to 60 seconds later on a computer monitor. DR uses electronic detectors instead of image plates. Following an exposure, the detectors transmit images through a wired or...

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