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Correction for displacement artifacts in 3D phase contrast imaging
Department of Biomedical Engineering, Örebro University Hospital, Örebro, Sweden; 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 Biomedical Engineering, Linköping University, Linköping, Sweden.
2002 (English)In: Journal of Magnetic Resonance Imaging, ISSN 1053-1807, E-ISSN 1522-2586, Vol. 16, no 5, 591-597 p.Article in journal (Refereed) Published
Abstract [en]

Purpose: To correct for displacement artifacts in 3D phase contrast imaging.

Materials and Methods: A 3D phase contrast pulse sequence was modified so that displacements of velocity measurements were restricted to one direction. By applying a postprocessing method, displaced measurements could be traced back to their accurate positions. Flow studies were performed using a phantom that generated flow through a stenosis, directed oblique relative to the phase and frequency encoding directions. Velocity profiles and streamline visualization were used to compare displaced and corrected velocity data to a reference.

Results: Velocity profiles obtained from the original measurement showed skewed profiles due to the displacement artifact, both at close proximity to the orifice as well as further downstream. After correction, concordance with the reference improved considerably.

Conclusion: The displacement artifact, which restricts the accuracy of phase contrast measurements, can be corrected for using the proposed method. Correction of the phase contrast velocity data may improve the accuracy of subsequent flow analysis and visualization.

Place, publisher, year, edition, pages
Hoboken, USA: John Wiley & Sons, 2002. Vol. 16, no 5, 591-597 p.
Keyword [en]
Convective acceleration, expansion point, stenosis, phase contrast, displacement artifacts
National Category
Medical and Health Sciences Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:oru:diva-50375DOI: 10.1002/jmri.10187ISI: 000179219500013PubMedID: 12412037Scopus ID: 2-s2.0-0036828977OAI: oai:DiVA.org:oru-50375DiVA: diva2:930258
Available from: 2016-05-23 Created: 2016-05-23 Last updated: 2017-10-17Bibliographically approved

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