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Correction for acceleration-induced displacement artifacts in phase contrast imaging
Department of Biomedical Engineering, Linköping University, Linköping, Sweden; Department of Medicine and Care, Division of Clinical Physiology, Linköping University, Linköping, Sweden.ORCID iD: 0000-0002-8351-3367
Department of Biomedical Engineering, Linköping University, Linköping, Sweden; Department of Medicine and Care, Division of Clinical Physiology, Linköping University, Linköping, Sweden.
Department of Medicine and Care, Division of Clinical Physiology, Linköping University, Linköping, Sweden.
Department of Medicine and Care, Division of Clinical Physiology, Linköping University, Linköping, Sweden.
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2000 (English)In: Magnetic Resonance in Medicine, ISSN 0740-3194, E-ISSN 1522-2594, Vol. 43, no 5, 734-738 p.Article in journal (Refereed) Published
Abstract [en]

The acceleration-induced displacement artifact impairs the accuracy of MR velocity measurements. This study proposes a post processing method for correction of this artifact. Velocity measurements were performed in a flow phantom containing a constriction. Velocity curves were obtained from streamlines parallel to the frequency, phase, and slice directions, respectively. The acceleration-induced displacement artifact was most prominent when the frequency encoding direction was aligned with the flow direction. After correction, velocity assignment improved and a more accurate description of the flow was obtained. In vivo measurements were performed in the aorta in a patient with a repaired aortic coarctation. The correction method was applied to velocity data along a streamline parallel to the frequency encoding direction. The result after correction was a new location of the peak velocity and improved estimates of the velocity gradients.

Place, publisher, year, edition, pages
New York, USA: John Wiley & Sons, 2000. Vol. 43, no 5, 734-738 p.
Keyword [en]
Velocity measurements, stenotic flow, convective, acceleration, expansion point
National Category
Medical and Health Sciences Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:oru:diva-50376DOI: 10.1002/(SICI)1522-2594(200005)43:5<734::AID-MRM16>3.0.CO;2-AISI: 000086790300016PubMedID: 10800039Scopus ID: 2-s2.0-0034012039OAI: oai:DiVA.org:oru-50376DiVA: diva2:930259
Available from: 2016-05-23 Created: 2016-05-23 Last updated: 2017-10-17Bibliographically approved

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