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15 Cards in this Set
- Front
- Back
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Recorded Detail
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The sharpness of the structural lines as recorded in the radiographic image.
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Density
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Radiographic density is the degree of blackening or opacity of an area in a radiograph due to the accumulation of black metallic silver following exposure and processing of the film.
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Contrast
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visible differences between any 2 selected areas of density levels within the radiographic image.
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Scale of contrast
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refers to the number of densities or shades of grey visible.
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Long scale
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is the term used when slight differences are present (low contrast) but the total number of densities is increased.
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Short scale
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is the term used when considerable or major differences between densities are present (high contrast) but the total number of densities is reduced.
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Film latitude
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The inherent ability of the film emulsion to react to radiation and record a range of densities.
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Film latitude and film contrast depend on
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the sensitometric properties of the film and the processing conditions. Determined directly from the characteristic curve.
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Film contrast
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The inherent ability of the film emulsion to react to radiation and record a range of densities.
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Spatial Resolution
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The sharpness of the structural edges recorded in the image
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Brightness
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Brightness is the measurement of the luminance of a monitor calibrated in units of candela per square meter on monitor or soft copy.
Density on a hard copy is the same as film. |
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Contrast
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Image contrast or display contrast is primarily determined by the processing algorithm. The default algorithm determines the initial processing codes applied to the image data.
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Scale of contrast—gray scale
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Linked to the bit depth of the system. Gray scale is used instead of scale of contrast when referring to digital images.
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Dynamic range
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The range of exposures that may be captured by a detector. Much larger for digital than for film.
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Receptor contrast
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The fixed characteristic of the receptor.
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