Effects of motion and b-matrix correction for high resolution DTI with short-axis PROPELLER-EPI.

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dc.contributor.author Aksoy, Murat en
dc.contributor.author Skare, Stefan en
dc.contributor.author Holdsworth, Samantha en
dc.contributor.author Bammer, Roland en
dc.date.accessioned 2018-11-13T23:33:06Z en
dc.date.issued 2010-08 en
dc.identifier.issn 0952-3480 en
dc.identifier.uri http://hdl.handle.net/2292/44229 en
dc.description.abstract Short-axis PROPELLER-EPI (SAP-EPI) has been proven to be very effective in providing high-resolution diffusion-weighted and diffusion tensor data. The self-navigation capabilities of SAP-EPI allow one to correct for motion, phase errors, and geometric distortion. However, in the presence of patient motion, the change in the effective diffusion- encoding direction (i.e. the b-matrix) between successive PROPELLER 'blades' can decrease the accuracy of the estimated diffusion tensors, which might result in erroneous reconstruction of white matter tracts in the brain. In this study, we investigate the effects of alterations in the b-matrix as a result of patient motion on the example of SAP-EPI DTI and eliminate these effects by incorporating our novel single-step non-linear diffusion tensor estimation scheme into the SAP-EPI post-processing procedure. Our simulations and in-vivo studies showed that, in the presence of patient motion, correcting the b-matrix is necessary in order to get more accurate diffusion tensor and white matter pathway reconstructions. en
dc.format.medium Print en
dc.language eng en
dc.relation.ispartofseries NMR in biomedicine en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.subject Brain en
dc.subject Humans en
dc.subject Diffusion Magnetic Resonance Imaging en
dc.subject Image Enhancement en
dc.subject Algorithms en
dc.subject Motion en
dc.subject Image Processing, Computer-Assisted en
dc.title Effects of motion and b-matrix correction for high resolution DTI with short-axis PROPELLER-EPI. en
dc.type Journal Article en
dc.identifier.doi 10.1002/nbm.1490 en
pubs.issue 7 en
pubs.begin-page 794 en
pubs.volume 23 en
dc.rights.holder Copyright: The author en
dc.identifier.pmid 20222149 en
pubs.end-page 802 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Research Support, Non-U.S. Gov't en
pubs.subtype research-article en
pubs.subtype Journal Article en
pubs.subtype Research Support, N.I.H., Extramural en
pubs.elements-id 683337 en
pubs.org-id Medical and Health Sciences en
pubs.org-id Medical Sciences en
pubs.org-id Anatomy and Medical Imaging en
dc.identifier.eissn 1099-1492 en
pubs.record-created-at-source-date 2010-10-04 en
pubs.dimensions-id 20222149 en

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