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Article: Piezoelectric actuator design for MR elastography: implementation and vibration issues

TitlePiezoelectric actuator design for MR elastography: implementation and vibration issues
Authors
KeywordsMR compatible
MR elastography device
control
vibration
Issue Date2011
PublisherJohn Wiley & Sons Ltd..
Citation
International Journal of Medical Robotics and Computer Assisted Surgery, 2011, v. 7 n. 3, p. 353-360 How to Cite?
AbstractBACKGROUND: MR elastography (MRE) is an emerging technique for tumor diagnosis. MRE actuation devices require precise mechanical design and radiofrequency engineering to achieve the required mechanical vibration performance and MR compatibility. METHOD: A method of designing a general-purpose, compact and inexpensive MRE actuator is presented. It comprises piezoelectric bimorphs arranged in a resonant structure designed to operate at its resonant frequency for maximum vibration amplitude. An analytical model was established to understand the device vibration characteristics. RESULTS: The model-predicted performance was validated in experiments, showing its accuracy in predicting the actuator resonant frequency with an error < 4%. The device MRI compatibility was shown to cause minimal interference to a 1.5 tesla MRI scanner, with maximum signal-to-noise ratio reduction of 7.8% and generated artefact of 7.9 mm in MR images. CONCLUSIONS: A piezoelectric MRE actuator is proposed, and its implementation, vibration issues and future work are discussed. Copyright © 2011 John Wiley & Sons, Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/209228
ISSN
2015 Impact Factor: 1.511
2015 SCImago Journal Rankings: 0.523

 

DC FieldValueLanguage
dc.contributor.authorTse, ZTH-
dc.contributor.authorChan, YJ-
dc.contributor.authorJanssen, H-
dc.contributor.authorHamed, A-
dc.contributor.authorYoung, I-
dc.contributor.authorLamperth, M-
dc.date.accessioned2015-04-13T07:49:35Z-
dc.date.available2015-04-13T07:49:35Z-
dc.date.issued2011-
dc.identifier.citationInternational Journal of Medical Robotics and Computer Assisted Surgery, 2011, v. 7 n. 3, p. 353-360-
dc.identifier.issn1478-5951-
dc.identifier.urihttp://hdl.handle.net/10722/209228-
dc.description.abstractBACKGROUND: MR elastography (MRE) is an emerging technique for tumor diagnosis. MRE actuation devices require precise mechanical design and radiofrequency engineering to achieve the required mechanical vibration performance and MR compatibility. METHOD: A method of designing a general-purpose, compact and inexpensive MRE actuator is presented. It comprises piezoelectric bimorphs arranged in a resonant structure designed to operate at its resonant frequency for maximum vibration amplitude. An analytical model was established to understand the device vibration characteristics. RESULTS: The model-predicted performance was validated in experiments, showing its accuracy in predicting the actuator resonant frequency with an error < 4%. The device MRI compatibility was shown to cause minimal interference to a 1.5 tesla MRI scanner, with maximum signal-to-noise ratio reduction of 7.8% and generated artefact of 7.9 mm in MR images. CONCLUSIONS: A piezoelectric MRE actuator is proposed, and its implementation, vibration issues and future work are discussed. Copyright © 2011 John Wiley & Sons, Ltd.-
dc.languageeng-
dc.publisherJohn Wiley & Sons Ltd.. -
dc.relation.ispartofInternational Journal of Medical Robotics and Computer Assisted Surgery-
dc.rightsInternational Journal of Medical Robotics and Computer Assisted Surgery. Copyright © John Wiley & Sons Ltd..-
dc.rightsSpecial Statement for Preprint only Before publication: 'This is a preprint of an article accepted for publication in [The Journal of Pathology] Copyright © ([year]) ([Pathological Society of Great Britain and Ireland])'. After publication: the preprint notice should be amended to follows: 'This is a preprint of an article published in [include the complete citation information for the final version of the Contribution as published in the print edition of the Journal]' For Cochrane Library/ Cochrane Database of Systematic Reviews, add statement & acknowledgement : ‘This review is published as a Cochrane Review in the Cochrane Database of Systematic Reviews 20XX, Issue X. Cochrane Reviews are regularly updated as new evidence emerges and in response to comments and criticisms, and the Cochrane Database of Systematic Reviews should be consulted for the most recent version of the Review.’ Please include reference to the Review and hyperlink to the original version using the following format e.g. Authors. Title of Review. Cochrane Database of Systematic Reviews 20XX, Issue #. Art. No.: CD00XXXX. DOI: 10.1002/14651858.CD00XXXX (insert persistent link to the article by using the URL: http://dx.doi.org/10.1002/14651858.CD00XXXX) (This statement should refer to the most recent issue of the Cochrane Database of Systematic Reviews in which the Review published.)-
dc.subjectMR compatible-
dc.subjectMR elastography device-
dc.subjectcontrol-
dc.subjectvibration-
dc.titlePiezoelectric actuator design for MR elastography: implementation and vibration issues-
dc.typeArticle-
dc.identifier.emailChan, YJ: yjchan@hku.hk-
dc.identifier.doi10.1002/rcs.405-
dc.identifier.pmid21793149-
dc.identifier.hkuros192878-
dc.identifier.volume7-
dc.identifier.issue3-
dc.identifier.spage353-
dc.identifier.epage360-
dc.publisher.placeUnited Kingdom-

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