Wiener beamforming and the coherence factor in ultrasound imaging
The coherence factor (CF) is used for aberration correction and sidelobe suppression in ultrasound imaging. Unfortunately, it suffers from artifacts when the SNR is low. We show how the CF can be interpreted as an implementation of the Wiener postfilter for a delay-and-sum beamformer. In addition, w...
| Publié dans: | IEEE transactions on ultrasonics, ferroelectrics, and frequency control. - 1986. - 57(2010), 6 vom: 02. Juni, Seite 1329-46 |
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| Auteur principal: | |
| Autres auteurs: | |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2010
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| Accès à la collection: | IEEE transactions on ultrasonics, ferroelectrics, and frequency control |
| Sujets: | Journal Article |
| Résumé: | The coherence factor (CF) is used for aberration correction and sidelobe suppression in ultrasound imaging. Unfortunately, it suffers from artifacts when the SNR is low. We show how the CF can be interpreted as an implementation of the Wiener postfilter for a delay-and-sum beamformer. In addition, we show that a minimum-variance, distortionless-response beamformer followed by CF weighting can be interpreted as an implementation of the Wiener beamformer. These interpretations provide us with a theoretical framework for analyzing and improving CF-based methods. We use this theory to develop more robust implementations for both the Wiener postfilter and beamformer. The performance of these implementations is shown on simulated and real data |
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| Description: | Date Completed 31.08.2010 Date Revised 25.11.2016 published: Print Citation Status MEDLINE |
| ISSN: | 1525-8955 |
| DOI: | 10.1109/TUFFC.2010.1553 |