17969111

Source:http://linkedlifedata.com/resource/pubmed/id/17969111

Download in:

Switch to

Custom View

Named Graph Language Inference

Statements in which the resource exists as a subject.
Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0011923, umls-concept:C0205349, umls-concept:C1551055
pubmed:issue	5
pubmed:dateCreated	2007-11-5
pubmed:abstractText	Whole-brain echo-planar spectroscopic imaging (EPSI) often substantially lengthens MRI/MRSI (magnetic resonance spectroscopic imaging) protocols. To halve acquisition time, application of a blipped phase-encoding (PE) gradient during the EPSI readout (RO) was previously suggested by PE of the even RO echoes in k-space at an interstitial location along k(PE), separated from the odd RO echoes, effectively reducing the number of PEs by a factor of 2. However, the approach is very susceptible to phase inconsistencies between even and odd RO echoes in the presence of B(0) inhomogeneities and gradient imbalance, leading to ghosting in the PE direction. In this work, the blipped PE gradient is placed in between pairs of even/odd RO gradient lobes to avoid these problems. This approach is demonstrated in a phantom and in normal human brain in vivo at 4T. While the proposed method allows substantial reduction in metabolite ghosting, it may be limited by the presence of a relatively large spurious signal at the Nyquist frequency.
pubmed:grant	http://linkedlifedata.com/resource/pubmed/grant/R01 NS 31966-11 A2
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/8505245
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	Nov
pubmed:issn	0740-3194
pubmed:author	pubmed-author:EbelAndreasA, pubmed-author:SchuffNorbertN
pubmed:copyrightInfo	Copyright 2007 Wiley-Liss, Inc.
pubmed:issnType	Print
pubmed:volume	58
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	1061-6
pubmed:meshHeading	pubmed-meshheading:17969111-Brain, pubmed-meshheading:17969111-Echo-Planar Imaging, pubmed-meshheading:17969111-Humans
pubmed:year	2007
pubmed:articleTitle	Accelerated 3D echo-planar spectroscopic imaging at 4 Tesla using modified blipped phase-encoding.
pubmed:affiliation	Northern California Institute for Research and Education, Department of Radiology, University of California San Francisco, Department of Veterans Affairs Medical Center San Francisco, San Francisco, California 94121, USA. andreas.ebel@ucsf.edu
pubmed:publicationType	Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, N.I.H., Extramural