What is the active layer in CR cassettes?
What is the active layer in CR cassettes?
The active layer of the CR imaging plate used for CR is termed photostimulable phosphor. This photostimulable phosphor is made of barium fluorohalide doped with europium (BaFx: Eu2; Figure 3), which is used as an activator to create a luminescence center.
Which of the following is the outermost component of a computed radiography CR cassette?
The outer cassette of a CR system must be a radiolucent material, such as carbon fibers. This allows the cassette, to provide structural support to the imaging plate without absorbing a significant number of photons.
What is the active element in a storage phosphor plate?
The active element in a storage phosphor is: barium fluorohalide. In reference to PSP image capture, to release the latent image, which of the following devices is scanned over the phosphor plate?
Where is the latent image in computed radiography formed quizlet?
Where is the latent image in computed radiography formed? In the photostimulable phosphor of the imaging plate.
What are CR cassettes made of?
The front of the cassette is made of a low atomic number material (e.g. plastic or carbon) to enable ease in passage of x-rays and the back is made of a high atomic number material (e.g. lead) to reduce backscatter.
What are the CR imaging plates made of?
Computed Radiography System These are typically made from BaFBR:Eu2+. The phosphor plates are exposed to x-rays and an electronic charge is stored at the location of the absorbed x-ray.
How does a CR cassette work?
Computed radiography (CR) cassettes use photo-stimulated luminescence screens to capture the X-ray image, instead of traditional X-ray film. The CR cassette goes into a reader to convert the data into a digital image.
What is CR plate?
Computed Radiography (CR) is a digital imaging and diagnosis technology that uses a special fluorescence plate called “photostimulable phosphor” instead of the conventional X-ray films to process X-ray images in a short time with high sensitivity.
How is latent image made visible in computed radiography?
How is the latent image made visible in computed radiography? By stimulating the metastable electrons with an intense beam of laser light.
Where is the latent image formed?
Unsourced material may be challenged and removed. A latent image is an invisible image produced by the exposure to light of a photosensitive material such as photographic film. When photographic film is developed, the area that was exposed darkens and forms a visible image.
What is computed radiography Slideshare?
• Computed Radiography is a digital image acquisition process that produces images that have much better contrast than a Conventional X-ray film-screen system.
What is CR imaging?
Sometimes called “film replacement technology”, Computed Radiography (CR) uses a flexible phosphor Imaging Plate (IP) to capture digital images instead of conventional photographic film.
How do you make a phosphor imaging plate?
The phosphor in a powdered form is mixed with a binder or adhesive material and laid down on a base with a thickness of about 0.3 mm. A surface coat protects the phosphor from physical damage. The imaging plate thus formed is similar in appearance to the intensifying screen used in conventional radiography.
What is the difference between CR and Dr in radiography?
This terminology is confusing, and through common usage, CR now describes digital radiography that uses a cassette system whereas DR is a direct capture image acquisition technology that uses digital plates, not CR cassettes.29 ( Fig. 2-36 ). Computed Radiography.
What equipment is used for CR radiography?
The plate is inserted into a light-tight cassette, also similar in appearance and with the same dimensions as that used for film–screen radiography. For this reason, X-ray equipment used for conventional radiography can be used for CR, making the transition fromanalogue to digital radiography straightforward.
