Document Detail


Inversion-recovery single-shot cardiac MRI for the assessment of myocardial infarction at 1.5 T with a dedicated cardiac coil.
MedLine Citation:
PMID:  22919017     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: The aim of this study was to assess the diagnostic accuracy of imaging myocardial infarction with a two-dimensional (2D) single-shot inversion-recovery (IR)-gradient-echo (GE) sequence compared with a standard 2D segmented IR-GE sequence at 1.5 T using a dedicated cardiac coil.
METHODS: 22 patients with myocardial infarction documented in the past 3-12 months were examined at 1.5 T using a 5 channel cardiac coil. Imaging of delayed enhancement was performed 15 min after administration of 0.2 mmol of gadopentetate dimeglumine per kilogram of body weight. Immediately after completion of the single-shot sequence, which allows for coverage of the entire ventricle during a single breath-hold with nine slices, the segmented IR sequence was started. Infarct volumes, infarct transmurality and contrast-to-noise ratios (CNRs) of infarcted and healthy myocardium were compared between both techniques.
RESULTS: Despite a moderate, non-significant loss of CNR (CNR(single-shot IR)=31.2±4.1; CNR(segmented IR)=37.9±4.1; p=0.405), the 2D single-shot technique correctly determined infarct size when compared with the standard 2D segmented IR-GE sequence. Assessment of both infarct volume (r=0.95; p<0.0001) and transmurality (r=0.97; p<0.0001) is possible, with excellent correlation of both techniques.
CONCLUSION: Single-shot delayed enhancement imaging during a single breath-hold is feasible at 1.5 T with the use of a dedicated cardiac coil. Despite a moderately lower CNR, the single-shot technique allows for fast and accurate determination of infarct size with high spatial resolution and has the potential to reduce electrocardiogram and breathing artefacts.
Authors:
M Wildgruber; M Settles; K Herrmann; A J Beer; E J Rummeny; A M Huber
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The British journal of radiology     Volume:  85     ISSN:  1748-880X     ISO Abbreviation:  Br J Radiol     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-08-24     Completed Date:  2012-11-05     Revised Date:  2013-09-03    
Medline Journal Info:
Nlm Unique ID:  0373125     Medline TA:  Br J Radiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  e709-15     Citation Subset:  AIM; IM    
Affiliation:
Department of Radiology, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany. moritz.wildgruber@tum.de
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Aged, 80 and over
Equipment Design
Equipment Failure Analysis
Female
Humans
Image Enhancement / methods
Image Interpretation, Computer-Assisted / instrumentation*,  methods*
Magnetic Resonance Imaging, Cine / instrumentation*,  methods*
Male
Middle Aged
Myocardial Infarction / pathology*
Reproducibility of Results
Sensitivity and Specificity
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