How often should CR plates be erased?
Too frequent cleaning of the phosphor screens can discolor the phosphor. The imaging plate that have not been used for more than 24 hours should be erased before use.
When should CR cassettes be erased?
One way of reducing the probability of obtaining ghost artifacts in a clinical setting is to erase all cassettes at the beginning of the day so that you can ensure it was properly erased. It is also important to erase cassettes before use, after they have set for 24 or more consecutive hours.
Does CR use cassettes?
Computed radiography (CR) uses a cassette similar to a film cassette. Instead of film, the cassette holds an imaging plate (IP), which is similar to an intensifying screen. Instead of emitting light when x-rays interact with it, the IP stores the x-ray energy in proportion to the intensity it receives.
What are the disadvantages of CR?
Disadvantages of CR
- CR requires the cassette be removed from the X-ray machine and then placed into a reader.
- The PSPs used in CR require longer readout and processing time.
- When single-plate readers are used, overexposures entail additional delay as the old signals are not completely erased very quickly.
What color light erases a CR plate?
bright white light
To erase any residual trapped energy from the imaging plate, a screen is exposed to a bright white light. The imaging plate is then placed back into the cassette to be reused.
What does CR mean in xray?
Computed Radiography
Sometimes called “film replacement technology”, Computed Radiography (CR) uses a flexible phosphor Imaging Plate (IP) to capture digital images instead of conventional photographic film.
What type of PSP is used for CR?
Computed radiography (CR) systems are very similar to film-based systems, but instead of film, a photostimulable phosphor plate is used. These flexible plates are 1 mm thick and are coated with europium activated fluorohalide compounds in crystalline formation embedded in organic binding material.