Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/63851
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dc.contributorDepartment of Biomedical Engineeringen_US
dc.creatorZhao, Jen_US
dc.creatorWang, Yen_US
dc.creatorYu, Jen_US
dc.creatorGuo, Wen_US
dc.creatorLi, Ten_US
dc.creatorZheng, YPen_US
dc.date.accessioned2017-02-09T08:30:43Z-
dc.date.available2017-02-09T08:30:43Z-
dc.identifier.issn0041-624Xen_US
dc.identifier.urihttp://hdl.handle.net/10397/63851-
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rights© 2015 Elsevier B.V. All rights reserved.en_US
dc.rights© 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.rightsThe following publication Zhao, J., Wang, Y., Yu, J., Guo, W., Li, T., & Zheng, Y. P. (2016). Subarray coherence based postfilter for eigenspace based minimum variance beamformer in ultrasound plane-wave imaging. Ultrasonics, 65, 23-33 is available at https://doi.org/10.1016/j.ultras.2015.10.026en_US
dc.subjectEigenspace based minimum variance beamformeren_US
dc.subjectCoherenceen_US
dc.subjectPlane-wave imagingen_US
dc.subjectSubarrayen_US
dc.subjectWiener postfilteren_US
dc.titleSubarray coherence based postfilter for eigenspace based minimum variance beamformer in ultrasound plane-wave imagingen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage23en_US
dc.identifier.epage33en_US
dc.identifier.volume65en_US
dc.identifier.doi10.1016/j.ultras.2015.10.026en_US
dcterms.abstractThis paper introduces a new beamformer, which combines the eigenspace based minimum variance (ESBMV) beamformer with a subarray coherence based postfilter (SCBP), for improving the quality of ultrasound plane-wave imaging. The ESBMV beamformer has been validated in improving the imaging contrast, but the difficulty in dividing the signal subspace limits the usage of it in the low signal-to-noise ratio (SNR) scenarios. Coherence factor (CF) based methods could optimize the output of a distortionless beamformer to reduce sidelobes, but the influence by the subarray decorrelation technique on the postfilter design has not attracted enough concern before. Accordingly, an ESBMV-SCBP beamformer was proposed in this paper, which used the coherence of the subarray signal to compute an SCBP to optimize the ESBMV results. Simulated and experimental data were used to evaluate the performance of the proposed method. The results showed that the ESBMV-SCBP method achieved an improved imaging quality compared with the ESBMV beamformer. In the simulation study, the contrast ratio (CR) for an anechoic cyst was improved by 9.88 dB and the contrast-to-noise ratio (CNR) was improved by 0.97 over the ESBMV. In the experimental study, the CR improvements for two anechoic cysts were 7.32 dB and 9.45 dB, while the CNRs were improved by 1.27 and 0.66, respectively. The ESBMV-SCBP also showed advantages over the ESBMV-Wiener beamformer in preserving a less grainy speckle, which is closer to that of distortionless beamformers and benefits the imaging contrast. With a relatively small extra computational load, the proposed method has potential to enhance the quality of the ultrasound plane-wave imaging.en_US
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationUltrasonics, Feb. 2016, v. 65, p. 23-33en_US
dcterms.isPartOfUltrasonicsen_US
dcterms.issued2016-02-
dc.identifier.eissn1874-9968en_US
dc.identifier.rosgroupid2015004170-
dc.description.ros2015-2016 > Academic research: refereed > Publication in refereed journalen_US
dc.description.oaAccepted Manuscripten_US
dc.identifier.FolderNumberBME-0245-
dc.description.fundingSourceOthersen_US
dc.description.fundingTextNational Basic Research Prgram of China; National Natural Science Foundation of China; Doctoral Fund of Ministry of Education; PolyUen_US
dc.description.pubStatusPublisheden_US
dc.identifier.OPUS6596575-
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