Abstract
The speckle appearance of images in pulse-echo scans often reduces the diagnostic potential of the technique. Considerable speckle reduction is being achieved for large aperture transducers by cutting them into sectors, and smoothing out the fluctuations by using phase-insensitive sector-addition (PISA) or a multiplicative signal processing technique. It appears that a simple real-time PISA processing can be the method used effectively to improve the image quality for a practical scanner.KeywordsSignal Processing TechniqueUltrasonic ImageSpeckle ReductionFull ConeMultiplicative TechniqueThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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