quantum mottle


mottle

 [mot´'l] a disturbance in a recorded radiographic image.grid mottle in radiology, a widening of grid lines when the grid is in motion.quantum mottle variations in optical density on a radiograph.

quan·tum mot·tle

mottle caused by the statistical fluctuation of the number of photons absorbed by the intensifying screens to form the light image on the film; faster screens produce more quantum mottle.

quantum mottle

In radiography, a speckled, snowy-looking, nonuniform mottle caused by an insufficient number of x-ray photons striking the radiographic image receptor during an exposure. The mottle is corrected by increasing milliampere seconds. See also: mottle