Radiographic Exposure
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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show | difference in adjacent densities
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Define quantity | show 🗑
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Define the relationship between ma and tube current | show 🗑
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show | Directly proportional
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Describe the relationship between exposure time and density | show 🗑
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Describe the relationship between time and mR | show 🗑
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Describe the relationship between mAs and density | show 🗑
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describe the relationship between kVp and mR | show 🗑
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Describe the relationship between SID and mR | show 🗑
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show | magnification, distortion, penumbra and density
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show | Any combination of mA and time can be used to get the same mAs with the same result in density.
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What is the 15% rule? | show 🗑
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show | mAs
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show | new mAs/old mAs = new D^2/old D^2
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What is meant by low contrast? | show 🗑
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show | few shades of gray
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show | lower the kVp
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show | Use a higher kVp
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show | mA, kVp, distance and time
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show | the penetrability of the beam
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What is the controlling factor of contrast? | show 🗑
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show | mAs
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What is the relationship between kVp and scatter? | show 🗑
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show | To make details visible
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show | Few shades of gray
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show | Many shades of gray
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show | The range of differences in the intensity of the remnant x ray beam after it has been attenuated by the patient.
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What is image receptor contrast? | show 🗑
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Five factors that affect image receptor contrast | show 🗑
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show | kVp, amount of tissue irradiated, type of tissue irradiated.
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show | Under or over exposure
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show | No influence.
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show | Little effect
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How does filtration affect contrast? | show 🗑
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show | Inversely related.
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How do grids affect contrast? | show 🗑
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show | Involuntary and voluntary.
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Give an example of involuntary motion. | show 🗑
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show | 0.25 to 2.5
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show | By a factor of 4 (inversely).
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What are the seven types of radiologic tissue types. | show 🗑
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Give an example of voluntary motion. | show 🗑
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Define density. | show 🗑
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What is fog? | show 🗑
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The total quantity of x rays produced in an x ray beam is determined by the _____. | show 🗑
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show | Source to image distance (SID)
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show | long scale contrast
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show | ma and time
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The shorter the SID, the __________ the intensity of the xray beam? | show 🗑
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show | The quantity of x rays reaching the image receptor.
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show | It decreases it.
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show | Inversely related.
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descibe the relationship between collimation and density | show 🗑
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Describe the relationship between thickness and density. | show 🗑
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Describe the relationship between grid ratio and density. | show 🗑
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Describe the relationship between thickness and contrast. | show 🗑
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show | Inversely related.
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