Document Detail


MR measurements of pulsatile pressure gradients.
MedLine Citation:
PMID:  7865944     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
S N Urchuk; D B Plewes
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
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:
Created Date:  1995-03-28     Completed Date:  1995-03-28     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9105850     Medline TA:  J Magn Reson Imaging     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  829-36     Citation Subset:  IM    
Affiliation:
Department of Medical Biophysics, University of Toronto, Ontario, Canada.
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MeSH Terms
Descriptor/Qualifier:
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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