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11 Cards in this Set
- Front
- Back
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Radiopaque
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Absorbs xrays, appears bright on a radiograph
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Radiolucent
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Transmits xrays, appears dark on a radiograph
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Density
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Degree of blackening of the radiograph
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Change in mAs to produce a visible change in density
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30%
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When only mAs is changed it should be
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halved or doubled
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Change in kVp to produce a perceptible chang in OD
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4%
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As kVp is increased, the quality of the beam is increased and more xrays penetrate the anatomic part, results in
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more image forming xrays
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15% rule
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increasing kvp by 15% is = to doubling the mAs
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Contrast
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the difference between adjacent densities
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OD equation
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Log base 10 of Incident light intensity over transmitted light intensity
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Scale of contrast
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number of shades of gray
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