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      • Faculty of Engineering
      • Department of Electrical and Electronics Engineering
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      Reduction of effects of inactive array elements in phase aberration correction

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      Author
      Karaman, Mustafa
      Köymen, Hayrettin
      Atalar, Abdullah
      O'Donnell, M.
      Date
      1993
      Source Title
      Proceedings of the 1993 IEEE Ultrasonics Symposium
      Print ISSN
      1051-0117
      Publisher
      IEEE
      Pages
      1155 - 1158
      Language
      English
      Type
      Conference Paper
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      Abstract
      Phase aberration correction based on time delay estimation via minimization of sum of absolute difference (SAD) between radio frequency (RF) signals of neighboring elements is studied in the presence of missing elements. To examine the influence of inactive elements, phase estimation error is measured for various combinations of different number of missing elements, aberration level, and SNR. The measurements are performed on an experimental RF data set. Aberration delays of missing elements are interpolated using the phase estimate between the nearest active elements. The B-scan images are reconstructed for qualitative examination.
      Keywords
      Aberrations
      Adaptive systems
      Computational methods
      Error analysis
      Error correction
      Image quality
      Image reconstruction
      Interpolation
      Mathematical models
      Parameter estimation
      Scanning
      Signal to noise ratio
      Inactive array elements
      Phase aberration correction
      Ultrasonic imaging
      Permalink
      http://hdl.handle.net/11693/27799
      Published Version (Please cite this version)
      https://doi.org/10.1109/ULTSYM.1993.339585
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      • Department of Electrical and Electronics Engineering 3524
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