Document Detail

Free-breathing cardiac MR with a fixed navigator efficiency using adaptive gating window size.
MedLine Citation:
PMID:  22367715     Owner:  NLM     Status:  MEDLINE    
A respiratory navigator with a fixed acceptance gating window is commonly used to reduce respiratory motion artifacts in cardiac MR. This approach prolongs the scan time and occasionally yields an incomplete dataset due to respiratory drifts. To address this issue, we propose an adaptive gating window approach in which the size and position of the gating window are changed adaptively during the acquisition based on the individual's breathing pattern. The adaptive gating window tracks the breathing pattern of the subject throughout the scan and adapts the size and position of the gating window such that the gating efficiency is always fixed at a constant value. To investigate the image quality and acquisition time, free breathing cardiac MRI, including both targeted coronary MRI and late gadolinium enhancement imaging, was performed in 67 subjects using the proposed navigator technique. Targeted coronary MRI was acquired from eleven healthy adult subjects using both the conventional and proposed adaptive gating window techniques. Fifty-six patients referred for cardiac MRI were also imaged using late gadolinium enhancement with the proposed adaptive gating window technique. Subjective and objective image assessments were used to evaluate the proposed method. The results demonstrate that the proposed technique allows free-breathing cardiac MRI in a relatively fixed time without compromising imaging quality due to respiratory motion artifacts.
Mehdi H Moghari; Raymond H Chan; Susie N Hong; Jaime L Shaw; Lois A Goepfert; Kraig V Kissinger; Beth Goddu; Mark E Josephson; Warren J Manning; Reza Nezafat
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2012-02-24
Journal Detail:
Title:  Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine     Volume:  68     ISSN:  1522-2594     ISO Abbreviation:  Magn Reson Med     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-22     Completed Date:  2013-05-29     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  8505245     Medline TA:  Magn Reson Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1866-75     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Wiley Periodicals, Inc.
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MeSH Terms
Breath Holding
Contrast Media
Gadolinium DTPA / diagnostic use*
Heart Diseases / diagnosis*
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Magnetic Resonance Imaging, Cine / methods*
Middle Aged
Reproducibility of Results
Respiratory-Gated Imaging Techniques / methods*
Sensitivity and Specificity
Grant Support
R01 EB008743/EB/NIBIB NIH HHS; R01 EB008743-04/EB/NIBIB NIH HHS; R01EB008743-01A2/EB/NIBIB NIH HHS
Reg. No./Substance:
0/Contrast Media; K2I13DR72L/Gadolinium DTPA

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

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