Document Detail


Motion artifact suppression in breath hold 3D contrast enhanced magnetic resonance angiography using ECG ordering.
MedLine Citation:
PMID:  17946855     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Vascular pulsation and cardiac motion compromise image quality in contrast enhanced magnetic resonance angiography (CE-MRA) in the thorax, resulting in blurring and ghosting artifacts. The use of ECG gating has been proposed in the past to mitigate these artifacts but previous methods suffered from increased scanner time because only a fraction of the cardiac cycle was used for image acquisition and from loss of the study when gating failed. We propose a robust ECG ordering of k-space for breath hold CE-MRA that acquires the central part of k-space in a motion-free portion of diastole and fills in from the periphery of k-space at all other times. To make maximal use of the contrast enhancement, data is acquired continuously even when the ECG signal is lost. The proposed sequence is shown to allow thoracic and pulmonary MRA with a higher resolution when compared to the conventional gated sequence.
Authors:
Pascal Spincemaille; Zhao Xi Hai; Liuquan Cheng; Martin Prince; Yi Wang
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference     Volume:  1     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2006  
Date Detail:
Created Date:  2007-10-23     Completed Date:  2008-03-19     Revised Date:  2014-08-21    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  739-42     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Algorithms
Artifacts*
Contrast Media
Electrocardiography / methods*
Heart Diseases / diagnosis*
Humans
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Imaging, Three-Dimensional / methods
Magnetic Resonance Angiography / methods*
Movement
Reproducibility of Results
Respiratory Mechanics*
Sensitivity and Specificity
Chemical
Reg. No./Substance:
0/Contrast Media

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


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