mottle

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Related to mottler: muddler

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.

mot·tle

(mot'tĕl),
Fine inhomogeneity of an area of generally uniform opacity on a photograph or radiograph; noise.
[fr. motley, fr. M.E. mot, speck]

mottle

Etymology: ME, motley, mixed colors
an effect observed in radiographic imaging when the dose of radiation used is reduced to a level at which individual quantum effects can be seen. At very low doses, the number of photons being produced is so small that the statistical variations in x-ray production can be visualized. Also called noise, quantum mottle.

mot·tle

(mot'tĕl)
Fine inhomogeneity of an area of generally uniform opacity on a photograph or radiograph; noise.
[fr. motley, fr. M.E. mot, speck]