Document Detail


Real-time color flow MRI.
MedLine Citation:
PMID:  10680689     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A real-time interactive color flow MRI system capable of rapidly visualizing cardiac and vascular flow is described. Interleaved spiral phase contrast datasets are acquired continuously, while real-time gridding and phase differencing is used to compute density and velocity maps. These maps are then displayed using a color overlay similar to what is used by ultrasound. For cardiac applications, 6 independent images/sec are acquired with in-plane resolution of 2.4 mm over a 20 cm field of view (FOV). Sliding window reconstruction achieves display rates up to 18 images/sec. Appropriate tradeoffs are made for other applications. Flow phantom studies indicate this technique accurately measures velocities up to 2 m/sec, and accurately captures real-time velocity waveforms (comparable to continuous wave ultrasound). In vivo studies indicate this technique is useful for imaging cardiac and vascular flow, particularly valvular regurgitation. Arbitrary scan planes can be quickly localized, and flow measured in any direction.
Authors:
K S Nayak; J M Pauly; A B Kerr; B S Hu; D G Nishimura
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine     Volume:  43     ISSN:  0740-3194     ISO Abbreviation:  Magn Reson Med     Publication Date:  2000 Feb 
Date Detail:
Created Date:  2000-03-07     Completed Date:  2000-03-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8505245     Medline TA:  Magn Reson Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  251-8     Citation Subset:  IM    
Affiliation:
Department of Electrical Engineering, Stanford University, California 94305-9510, USA. nayak@lad.stanford.edu
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MeSH Terms
Descriptor/Qualifier:
Aortic Valve / pathology
Aortic Valve Insufficiency / diagnosis
Blood Flow Velocity
Carotid Arteries / anatomy & histology
Color
Coronary Vessels / anatomy & histology
Humans
Iliac Artery / anatomy & histology
Magnetic Resonance Angiography / instrumentation,  methods*,  statistics & numerical data
Mitral Valve / pathology
Mitral Valve Insufficiency / diagnosis
Phantoms, Imaging / statistics & numerical data
Popliteal Artery / anatomy & histology
Reference Values
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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