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Efficient two-dimensional blocked element compensation

P C Li1, M O'Donnell

  • 1Electrical Engineering and Computer Science Department, University of Michigan, Ann Arbor 48109-2122.

Ultrasonic Imaging
|July 1, 1994
PubMed
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This study introduces efficient algorithms to improve ultrasound imaging by compensating for blocked array elements. These methods effectively reduce sidelobes, enhancing image quality without substantial hardware increases.

Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Array Signal Processing

Background:

  • Large, two-dimensional, anisotropic arrays aim to enhance ultrasound image quality.
  • Noncontiguous acoustic windows can block array elements, causing high sidelobes and degrading image quality.

Purpose of the Study:

  • To develop and evaluate computationally efficient algorithms for compensating blocked elements in two-dimensional ultrasound arrays.
  • To address the increased complexity of extending one-dimensional compensation methods to two dimensions.

Main Methods:

  • Proposed several computationally efficient algorithms for two-dimensional blocked element compensation.
  • Evaluated algorithms considering both lateral and elevational beam characteristics.
  • Investigated the use of a limited number of receive beams for compensation.

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Main Results:

  • Demonstrated effective removal of undesired sidelobes caused by blocked elements.
  • Showed that compensation can be achieved using only a limited number of receive beams.
  • Confirmed that image quality can be restored without significant hardware complexity increase.

Conclusions:

  • Developed efficient algorithms for two-dimensional blocked element compensation in ultrasound arrays.
  • Successfully restored image quality by mitigating sidelobe artifacts from blocked elements.
  • The proposed methods offer a practical solution for improving ultrasound imaging with large arrays.