Linked Life Data

7568384

Source:http://linkedlifedata.com/resource/pubmed/id/7568384

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
1995-11-21
pubmed:abstractText
The three most widely used single-volume NMR localization techniques (ISIS, STEAM and PRESS) are assessed quantitatively for 1H spectroscopy using an EEC localization test object. Signal selection efficiency, suppression of outer volume signals and contamination are measured on a 1.5 T whole-body Siemens GBS1 system. The ISIS signal selection efficiency (volume of interest (VOI), 1-125 cm3) ranged from 90% to 95%, with T1 relaxation during the sequence shown to account for the observed 5-10% signal loss. Contamination for ISIS was found to be higher for smaller VOIS and ranged from approximately 45% (VOI = 1 cm3) to approximately 9% (VOI = 125 cm3). For PRESS, contamination ranged from 7% to 12% and it was between 3% and 8% for STEAM. However, the maximum signal selection efficiency for the latter two techniques (echo time, 270 ms) was relatively low (10-17%), and limited by T2 losses and the non-rectangular slice profiles of sinc pulses.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0031-9155
pubmed:author
pubmed:issnType
Print
pubmed:volume
40
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1293-303
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Quantification of signal selection efficiency, extra volume suppression and contamination for ISIS, STEAM and PRESS localized 1H NMR spectroscopy using an EEC localization test object.
pubmed:affiliation
CRC Clinical Magnetic Resonance Research Group, Institute of Cancer Research, Sutton, Surrey, UK.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't