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DR & PACS ch5

Digital Radiographt & Pacs- Carter & Veale Chapter 5

Why is the size of the IP important? If the cassette is too big the image will have less detail. By using the smallest IP the image will turn out having a higher sampling rate.
How is the grid selected for an exam? Based on frequency, ratio, focus, and size.
Why is collimation important? The more tissue that is being exposed results in more scatter and radiation to the patient and it reduces grid cleanup.
How could lack of collimation affect the image? The image will have decreased contrast.
What is it important to use left and right markers on every image? It identifies the side being examined and the tech who preformed the exam.
What happens to an image if it has insufficient photons? The image will be noisy.
What is the purpose of algorithms? Determine collimation borders and histogram formation.
What are the four common types of artifacts? Plate, plate reader, imaging processing, and printer.
Created by: jenny.dvorak