coherent speckle

coherent speckle

Ultrasonography A deterioration in contrast resolution that occurs in pulse-echo ultrasonography, due to phase interference of echoes returning simultaneously from different tissue regions to the receiving transducer. See Speckle pattern.
References in periodicals archive ?
The creative potential of singularities can be observed in a coherent speckle field, where the electromagnetic energy is randomly scattered from a surface and propagates to some finite distance.
Caption: Fig.4 Generation and measurement of a coherent speckle field, where a rough Gaussian surface, the phase diffuser (with perfect transmission), gives rise to a speckle pattern.