DR & PACS ch4 Word Scramble
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Question | Answer |
What are the parts of the Digital Imaging cassette? | The imaging plate and the reader. |
What are the different layers in the IP? | Protective layer, phosphor layer, reflective layer, conductive layer, color layer, support layer, backing layer. |
What is photostimulation and what is its purpose in the IP? | Traps the electrons during exposure. |
How is the IP read? | It is inserted into a reader that removes the imaging plate and scans it with a laser to release the stored electrons. |
What is the phosphor layer? | A layer of photostimulable phosphor that traps electrons during exposure. |
What is the protective layer? | A very thin, touch, clear plastic that protects the phosphor layer. |
What is the reflective layer? | This layer sends a light in a forward direction when it is released in the cassette reader. |
What is the conductive layer? | A layer of material that absorbs and reduces static electricity. |
What is the color layer? | Absorbs the stimulating light but reflects emitted light. |
What is the support layer? | A semi-rigid material that gives the imaging sheet some strength. |
What is the backing layer? | A soft polymer that protects the back of the cassette. |
How is the imaging plate erased? | By returning most of the electrons to a lower energy state, removing the image from the plate. |
What are barcodes used on imaging plates? | Links the imaging plate to the patient information and is used to identify the IP/cassette. |
What do Barium fluorohalide crystals do? | Release light energy in the IP, which is then stored in the conductive layer. |
What does a photomultiplier do? | amplifies the light and sends it to a signal digitizer. |
What does the digitizer do? | assigns a numerical value to each pixel in a matrix according to the brightness of the light and its position. |
How is spatial resolution determined? | The thickness of the phosphor layer and the number of pixels. |
Created by:
jenny.dvorak
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