Computed radiography (CR) is a filmless process that is used to create digital, 2-dimensional radiographs. CR provides the ability to view radiographic images from a computer using the same conventional radiography exposure equipment. It eliminates the need for chemical processing, uses lower source strength, enables smaller boundaries and yields quicker results. Images have greater definition and higher resolution, allowing for greater detail in evaluation. Data storage and retrieval could not be simpler and information can be shared via the internet.
CR has several significant advantages:
– Phosphor Imaging Plates are reusable
– Chemical processing and a darkroom are not required
– Plate exposure times are typically less than film
– ScanX View Software offers the tools to optimize image quality
– Digital information is easily stored and shared
CR follows a simple 3-step process:
When the IP is exposed to X-ray or gamma radiation, the phosphor layer in the plate stores the image.
As the IP is read by the scanner, a focused laser releases the stored image in the form of visible light photons.
These photons are collected and amplified by the scanner, converted to a digital signal and then transferred to a computer for processing and display.
What are the advantages?
Film radiography offers little opportunity to vary the technique, other than picking a different film type. CR also offers different imaging plates, but also there are many scanner control parameters that can be adjusted to the required inspection task, optimizing image quality and maximizing productivity.