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      • Department of Electrical and Electronics Engineering
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      Influence of missing array elements on phase aberration correction for medical ultrasound

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      Author(s)
      Karaman, M.
      Köymen, Hayrettin
      Atalar, Abdullah
      O'Donnell, M.
      Date
      1994
      Source Title
      IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
      Print ISSN
      0885-3010
      Publisher
      IEEE
      Volume
      41
      Issue
      5
      Pages
      613 - 620
      Language
      English
      Type
      Article
      Item Usage Stats
      195
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      207
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      Abstract
      The influence of missing array elements on aberration correction based on time delay estimation using radio frequency signals of neighboring elements is experimentally investigated. Normalized cross correlation and sum of absolute differences are employed as the cost functions in aberration estimation. Their performance is tested through various measurements using radio frequency data acquired with a 3.3 MHz, 64-element phased array. Variation of cost functions and phase estimation error are obtained for different combinations of number of missing elements, amount of aberration, and noise level. For a particular combination of these parameters, a set of B-scan images is reconstructed and presented to examine the effects of residual phase errors on image quality.
      Keywords
      Diffuse scatterers
      Point reflectors
      Basic principles
      Signals
      Permalink
      http://hdl.handle.net/11693/13631
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/58.308496
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      • Department of Electrical and Electronics Engineering 4012
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