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Noise cancellation technique for Doppler ultrasound spectrogram enhancement

2011-07-11Conference object Restricted access
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dc.contributor.authorZabihian, B.
dc.contributor.authorTeixeira, C. A.
dc.contributor.authorRuano, M. Graça
dc.date.accessioned2015-04-13T14:53:37Z
dc.date.available2015-04-13T14:53:37Z
dc.date.issued2011-07-11
dc.description.abstractDoppler ultrasound (DU) automatic detection of clinically relevant blood flow spectral parameters may be a difficult task when the spectrogram is corrupted with different types of noise. This paper introduces a technique to eliminate the spectrogram background noise without damaging the blood flow signals' content. Tests were performed on simulated signals with known spectral characteristics. Different signal to noise ratios were tested. Results of 100 signals were averaged. Based on the STFT spectrogram the center frequency and bandwidth of the simulated noisy signals were computed and evaluated against the deterministic curve. Results obtained by defining the background area of DU simulated signals and applying 7% of Cancellation level on signals with 10 dB of signal-to-noise ratio (SNR) produced mean frequency estimations with a maximum bias of 106 Hz. The maximum bias of the bandwidth estimations in this case was 124 Hz. Since the sampling frequency of the DU simulated signals were 12800 Hz, usage of the proposed noise cancelation technique enabled spectral parameters estimations with meaningless errors demonstrating the effectiveness of the proposed technique. © 2011 IEEE.
dc.identifier.doihttp://dx.doi.org/10.1109/PAHCE.2011.5871870
dc.identifier.otherAUT: MRU00118;
dc.identifier.urihttp://hdl.handle.net/10400.1/5882
dc.language.isoeng
dc.peerreviewedyes
dc.subjectBlood flow signal
dc.subjectDoppler ultrasound
dc.subjectNoise cancellation
dc.titleNoise cancellation technique for Doppler ultrasound spectrogram enhancement
dc.typeconference object
dspace.entity.typePublication
oaire.citation.endPage164
oaire.citation.startPage159
oaire.citation.titlePan American Health Care Exchanges, PAHCE 2011 - Conference, Workshops, and Exhibits. Cooperation / Linkages: An Independent Forum for Patient Care and Technology Support
person.familyNameTeixeira
person.familyNameRuano
person.givenNameCésar
person.givenNameMaria
person.identifier.ciencia-id9811-A0DD-D5A5
person.identifier.orcid0000-0001-9396-1211
person.identifier.orcid0000-0002-0014-9257
person.identifier.ridA-3477-2012
person.identifier.ridA-8321-2011
person.identifier.scopus-author-id55826531700
person.identifier.scopus-author-id7004483805
rcaap.rightsrestrictedAccess
rcaap.typeconferenceObject
relation.isAuthorOfPublication29e9844d-9355-4f2a-badf-9e7ad3117cdb
relation.isAuthorOfPublication61fc8492-d73f-46ca-a3a3-4cd762a784e6
relation.isAuthorOfPublication.latestForDiscovery29e9844d-9355-4f2a-badf-9e7ad3117cdb

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