释义 |
DictionarySeecontrastlong-scale contrast
long-scale contrastA 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: contrastlong-scale con·trast (lawng-skāl kontrast) A radiographic image that shows many shades of gray and thus has low contrast. |