| MR measurements of pulsatile pressure gradients. | |
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MedLine Citation:
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PMID: 7865944 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A magnetic resonance (MR) imaging method for evaluating pulsatile pressure gradients in laminar blood flow is presented. The technique is based on an evaluation of fluid shear and inertial forces from cardiac-gated phase-contrast velocity measurements. The technique was experimentally validated by comparing MR and manometer pressure gradient measurements performed in a pulsatile flow phantom. Analyses of random noise propagation and sampling error were performed to determine the precision and accuracy of the method. The results indicate that a precision of 0.01-0.03 mmHg/cm and an accuracy of better than 8% can be achieved by using standard clinical pulse sequences in tubes exceeding 6 mm in diameter. The authors conclude that MR measurement of pressure gradients is feasible and that additional hemodynamic information may be derived from conventional phase-contrast imaging studies. |
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Authors:
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S N Urchuk; D B Plewes |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 4 ISSN: 1053-1807 ISO Abbreviation: J Magn Reson Imaging Publication Date: 1994 Nov-Dec |
Date Detail:
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Created Date: 1995-03-28 Completed Date: 1995-03-28 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 829-36 Citation Subset: IM |
Affiliation:
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Department of Medical Biophysics, University of Toronto, Ontario, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Arteries / physiology Blood Flow Velocity / physiology Blood Pressure / physiology* Blood Viscosity / physiology Compliance Feasibility Studies Hemodynamics / physiology Hemorheology* Humans Magnetic Resonance Imaging* Manometry Models, Cardiovascular Models, Structural Pulsatile Flow / physiology* Regional Blood Flow / physiology Reproducibility of Results Signal Processing, Computer-Assisted Transducers, Pressure |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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