A Frequency Diversity Method of Reducing Speckle in Wideband Ultrasound Images

  • B. A. McDermott
  • F. L. Thurstone
Part of the Acoustical Imaging book series (ACIM, volume 15)


A set of concurrent real-time B-mode image lines has been formed using a parallel processing system. In this system, a wideband received echo is partitioned by frequency diversity filtering and separate image lines are formed. Due to their differing constituent frequencies, these lines have decorrelated speckle patterns. The amount of speckle in the displayed image is reduced upon averaging these image lines. The reduction in image speckle and the accompanying improvement in perceived resolution is accomplished with no sacrifice of temporal resolution or display format. The effects of filter separation and amplitude apodization of the received frequency spectrum are investigated through statistical analysis of images containing speckle producing targets. A measurable increase in image signal-to-noise ratio has been achieved.


Frequency Diversity Speckle Pattern Image Line Image Speckle Speckle Reduction 
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Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • B. A. McDermott
    • 1
  • F. L. Thurstone
    • 1
  1. 1.Department of Biomedical EngineeringDuke UniversityDurhamUSA

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