Linked Life Data

19201634

Source:http://linkedlifedata.com/resource/pubmed/id/19201634

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2009-4-6
pubmed:abstractText
An efficient MRI technique for quantitative density profiling of samples with fast spin-lattice relaxation (T(1)<5ms) is introduced. The pulse scheme is based on the 1D centric scan SPRITE technique. Strong excitation of the sample at the k-space origin improves the sensitivity with respect to the original centric scan SPRITE technique. Radio frequency pulse durations are defined so as to provide uniform excitation of the sample at every k-space point. For a particular k-space point the pulse duration is required to be less than the inverse sample bandwidth. Simulations permit one to examine distortions from ideal profile geometry due to flip angle and spin-lattice relaxation effects. The proposed technique is especially suitable for the observation of low sensitivity samples, in particular, low-gamma nuclei like (35)Cl. In some cases, this strategy permits one to reduce the number of scans, i.e. the experiment time, by a factor of 100, depending on hardware, sample length and tolerable resolution loss. The designed pulse scheme is tested on cylindrical agar gel and type 1 Portland cement paste phantoms prepared to provide (1)H and (35)Cl signals, respectively.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
1096-0856
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
198
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
24-30
pubmed:dateRevised
2009-11-4
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
(35)Cl profiling using centric scan SPRITE with variable flip angle excitation.
pubmed:affiliation
MRI Centre, Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, NB, Canada E3B 5A3.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't