Radt 146 Test 2 with correct answers

Radt 146 Test 2 with correct answers

What does CR and DR stand for? - correct answer ✔Computerized radiography
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and digitized radiography
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What color stimulates the phosphor? - correct answer ✔The red laser light
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which emits light based on the intensity of the laser light
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What color does the phosphor emit? - correct answer ✔Blue
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What color cleans the plate? - correct answer ✔White
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What is the phosphor or active layer made of? - correct answer ✔Phosphors
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from the barium fluorohalide family: Barium Fluorobromide & Barium
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Fluoroiodine
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Needle PSP - correct answer ✔better detail than conventional powder PSP
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-inc absorption of xrays and limit spread of emission
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What does the active layer contain that prevents light spread? - correct answer
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✔Light absorbing dye
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What does photostimulable phosphor (PSP) do? - correct answer ✔It is a
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phosphor that "traps" electrons and emits light later when exposed to a
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different light source
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, What's the purpose of the protective coat? - correct answer ✔Protects the
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phosphor crystals
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What is the purpose of the binder? - correct answer ✔Suspends the phosphor
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crystals
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What does the photomultiplier tube (PMT) do? - correct answer ✔Reads the
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blue violet light and converts the light to an electric signal
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What is a ghosting artifact? - correct answer ✔Something that can happen with
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an incomplete erasure of the imaging plate
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The sensitivity number is __________ proportional to radiation striking detector
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- correct answer ✔Inversely
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Ex: 250 = underexposure
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150= overexposure
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The Exposure Index is used rather than S and is ________________ to radiation
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striking the IR - correct answer ✔Directly proportional
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Ex: 2,0 to 2.4 for an exam
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Lower than 2.0 is underexposure
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Higher than 2.4 is overexposure
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The principle source of noise(graininess) in an image is - correct answer
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✔Scatter
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