Document Detail


Pulmonary vein inflow artifact reduction for free-breathing left atrium late gadolinium enhancement.
MedLine Citation:
PMID:  21360738     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Two-dimensional "pencil-beam" navigator, placed on the right hemidiaphragm, is used for free-breathing late gadolinium enhancement of the left atrium in patients with atrial fibrillation. The pencil-beam navigator creates an inflow artifact in the right pulmonary veins and atrial wall that may obscure local pulmonary vein and left atrium scars. To reduce this artifact, we propose a large slab right hemidiaphragm projection navigator that measures the respiratory motion while reducing the associated inflow artifact. Eighteen subjects underwent pulmonary vein late gadolinium enhancement using the pencil-beam and projection navigator. Subjective inflow and respiratory motion artifact scores (1 = severe, 2 = moderate, 3 = mild, and 4 = none) from two blinded readers were compared. The artifact scores were 3.8 ± 0.4 and 2.1 ± 0.7 for the projection and pencil-beam navigators, respectively (P < 0.001). Respiratory motion artifact scores were similar between the two techniques (3.0 ± 0.5 vs. 3.1 ± 0.5 for projection vs. pencil-beam navigator). The proposed method greatly reduces the inflow artifact in free-breathing pulmonary vein late gadolinium enhancement while allowing adequate respiratory motion compensation.
Authors:
Mehdi H Moghari; Dana C Peters; Jouke Smink; Lois Goepfert; Kraig V Kissinger; Beth Goddu; Thomas H Hauser; 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:  2011-02-28
Journal Detail:
Title:  Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine     Volume:  66     ISSN:  1522-2594     ISO Abbreviation:  Magn Reson Med     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-06-22     Completed Date:  2011-12-19     Revised Date:  2013-06-30    
Medline Journal Info:
Nlm Unique ID:  8505245     Medline TA:  Magn Reson Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  180-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Wiley-Liss, Inc.
Affiliation:
Department of Medicine, Cardiovascular Division, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Artifacts*
Atrial Fibrillation / pathology,  physiopathology
Female
Gadolinium* / metabolism
Heart Atria / pathology*
Humans
Imaging, Three-Dimensional / methods
Magnetic Resonance Angiography / methods*
Male
Middle Aged
Pulmonary Veins / pathology*
Respiration
Grant Support
ID/Acronym/Agency:
R01 EB008743-02/EB/NIBIB NIH HHS; R01 EB008743-04/EB/NIBIB NIH HHS; R01EB008743-01A2/EB/NIBIB NIH HHS; UL1 RR025758-01/RR/NCRR NIH HHS
Chemical
Reg. No./Substance:
7440-54-2/Gadolinium
Comments/Corrections

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


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