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a radiographic image containing a wide range and great number of shades of gray with little difference in the adjacent tones. Also called low contrast.
A radiograph that demonstrates small differences in density between adjacent areas. Long-scale contrast is a result of high kilovoltage peak (kVp). In dental radiography, for example, 80 to 90 kVp or higher is necessary to produce a radiograph with long-scale contrast.
See also: contrast
long-scale con·trast(lawng-skāl kontrast)
A radiographic image that shows many shades of gray and thus has low contrast.