Document Detail


Reducing localized signal fluctuation in fMRI using spectral-spatial fat saturation.
MedLine Citation:
PMID:  22532447     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Conventional 1D, spatially nonselective fat saturation can generate uncrushed fat signals in areas far outside the imaging slice where crushers are weak because of reduced gradient linearity. These fat signals can corrupt in-slice water signal, and in functional MRI, they can manifest themselves as artifacts such as clouds in image background or localized signal fluctuation over time. In this article, a spectral-spatial radiofrequency pulse is proposed to replace the conventional, spatially nonselective fat saturation pulse. The advantage of the proposed method is that fat protons far outside the image slice would not be excited because of the spatial selectivity, thereby removing the root cause of the fat aliasing artifacts. The proposed method also preserves thin slice capability, pulse duration, and fat suppression performance of the conventional method. Bloch simulation and human volunteer results show that the method is effective in reducing the fat aliasing artifacts seen in functional MRI. Magn Reson Med, 2012. © 2012 Wiley Periodicals, Inc.
Authors:
Dan Xu; R Scott Hinks; Kevin F King
Related Documents :
22565377 - Prospective motion correction using tracking coils.
21096717 - A novel device with 36 channels for imaging and signal acquisition of the gastrointesti...
20441327 - Ion imaging in a high-gradient magnetic guide.
22487157 - Reliability of the rectus femoris muscle cross-sectional area measurements by ultrasono...
16092347 - Interstitial doppler optical coherence tomography.
25308437 - Evaluation of single-cell gel electrophoresis data: combination of variance analysis wi...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-24
Journal Detail:
Title:  Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine     Volume:  -     ISSN:  1522-2594     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8505245     Medline TA:  Magn Reson Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Wiley Periodicals, Inc.
Affiliation:
Applied Science Laboratory, General Electric Healthcare, Milwaukee, Wisconsin, USA. Dan.Xu@ge.com.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Engineering of Osmium(II)-Based Light Absorbers for Dye-Sensitized Solar Cells.
Next Document:  One-pot synthesis and characterization of subnanometre-size benzotriazolate protected copper cluster...