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17 Cards in this Set
- Front
- Back
Misrepresentation of the true size or shape of an object is the definition of which of the following? A. Recorded detail B. Elongation C. Distortion D. Magnification |
C. Distortion |
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What are the two types of distortion that can reduce the quality of a radiograph? A. Size and shape B. Size and contrast C. Brightness and contrast D. Long and Short |
A. Size and shape |
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Which of following is the most important factor in controlling size distortion? A. Focal Spot Size B. SID C. OID D. Exposure times |
C. OID |
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Which of the following will keep size distortion to a minimum? A. Increase kVp B. Increase Grid Ratio C. Increase SID D. Increase focal spot size |
C. Increase SID |
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Which of the following occurs when the OID is increased? A. Image size is reduced B. Image is magnified C. Image is elongated D. Image is foreshortened |
B. Image is Magnified |
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Which of the following distances would produce the lest distortion? 1. 40" 2. 60" 3. 72" A. 1 only B. 3 Only C. 2 and 3 only D. 1, 2, and 3 |
B. 3 Only |
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How does magnification affect image quality? |
Decrease recorded detail/spatial resolution |
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An X-ray tube that is designed for magnification radiography is referred to as what? A. Fraction-focus tube B. Mini-tube C.Macro-tube D. Radiographic enlarger |
A. Fraction-focus tube |
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What advantage is there to magnifying objects |
small objects become visible |
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Size distortion can be used to an advantage for which of the following radiographic procedures? A. Gastrointestinal B. Skeletal C. Angiographic D. Neurological |
C. Angiographic |
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Which of the following will produce the largest image? A. 40" SID 3" OID B. 40" SID 5" OID C.72" SID 3" OID D.72" SID 5" OID |
B. 40" SID 5" OID |
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To avoid shape distortion, which of the following must be paid close attention to? A. SID B. Part angulation C. Part to table top distanc D. X-Ray tube angulation |
D. X-Ray tube angulation |
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What percentage increase is usually used for magnification radiography? A. 25% B. 50% C. 75% D.100% |
D.100% |
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Which of the following would be used to minimize size distortion? 1. Shortest possible OID 2. Smallest focal spot size 3. Longest SID A. 1 only B. 1&3 only C. 2&3 only D.1, 2, & 3 |
D.1, 2, & 3 |
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What is the definition of recorded detail? |
The sharpness of the structural lines |
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Which of the following statements would define spatial resolution in digital imaging? A. The contrast in an image B. the lack of distortion in an image C. The measure of the amount of detail in an image D. The number of gray tones in an image |
C. The measure of the amount of detail in an image |
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Which of the following screen speeds will produce the best recorded detail? a. 50 b. 100 c. 200 d. 400 |
a. 50 |