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Cards In This Set
| Front | Back |
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The size of the focal spot has an effect on which of the following?
A. Density
B. Distortion and magnification
C. Contrast
D. Detail
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D. Detail
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A change of 100 mA to 200 mA would have the greatest effect on:
A. Magnification
B. Density
C. Detail
D. Contrast
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D. Density
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Radiographic grids are used in radiography:
A. As a substitute for filters
B. To reduce patient dose
C. To reduce fog on the radiograph
D. To protect the patient from scatter radiation
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C. To reduce fog on the radiograph
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Kilovoltage is the technical factor selected to influence all of the following except:
A. Grid radius
B. Patient dose
C. Contrast
D. Penetrating power of the beam
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A. Grid radius
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Distortion and magnification can be reduced by which of the following?
A. Long object-film distance
B. Short object-film distance
C. Short focal-film distance
C. Increased mA
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B. Short object-film distance
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What is the most effective method for reducing the effects of patient motion on the radiograph?
A. Reduce mA
B. Reduce kilovoltage
C. Reduce distance
D. Reduce time
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D. Reduce time
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A change in kilovoltage will have a dramatic effect on:
A. Detail and distortion
B. Density and magnification
C. Density and contrast
D. Detail and focal spot size
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C. Density and contrast
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Of the following, the most effective means of reducing magnification is:
A. Kilovoltage
B. Distance
C. mA
D. Time
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B. Distance
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A radiograph with many shades of gray with little difference between the sahdes is referred to as which of the following?
A. Low penumbra
B. High contrast
C. Long-scale contrast
D. Short-scale contrast
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C. Long-scale contrast
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Which of the following has no effect on recorded detail?
A. Heat-units capacity
B. Object-film distance
C. Focal-film distance
D. Focal spot size
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A. Heat-units capacity
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Milliamperage is the technical factor that chiefly influences which of the following?
A. Contrast
B. Density
C. Detail
D. Distortion
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B. Density
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Which of the following appears "radiopaque", or white-looking on an x-ray film?
A. Barium sulfate
B. Carbon dioxide
C. Air
D. Both B and C
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A. Barium sulfate
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Blurring of the image caused by involuntary motion may be effectively controlled by all of the following except:
A. Verbal comands
B. Decreasing milliampere-seconds
C. Decreasing exposure time
D. Immobilization devices
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B. Decreasing milliampere-seconds
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The average background radiation per person is _______ per year.
A. 70 mrem
B. 300 mrem
C. 370 mrem
D. 100,000 mrem
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C. 370 mrem
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What is the device that is designed to absorb scattered radiation generated by the patient's body tissue?
A. Cassette
B. Imaging Plate
C. Calipers
D. Grid
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D. Grid
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