Linked Life Data

10873201

Source:http://linkedlifedata.com/resource/pubmed/id/10873201

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2000-8-25
pubmed:abstractText
In this paper, we present the first description of a technique to visualize and quantitate radiofrequency (RF) heating of a tissue phantom during a magnetic resonance imaging (MRI) procedure. We evaluated the heating patterns of four 10 cm diameter transmit/receive surface coils with differing degrees of distributed capacitance. The tissue phantom was a 6% agarose gel doped with 40 mM Na(4)HTm[DOTP], and possesses a conductivity intermediate to human muscle and fat. Heating was discerned via phase difference mapping using the large temperature dependent chemical shift coefficient for 23Na in Na(4)HTm[DOTP]. This coefficient is -0.5 ppm/ degrees C. Heating was highest where the phantom was closest to the surface coils, dropping off towards the center of the coil. No significant difference was observed in the heating patterns between the different surface coils. For the experimental setups used in this study, electric field 'hot spots' at the areas corresponding to the placement of the capacitor gaps were not observed.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0968-5243
pubmed:author
pubmed:issnType
Print
pubmed:volume
10
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
114-21
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
MR imaging of RF heating using a paramagnetic doped agarose phantom.
pubmed:affiliation
Departments of Chemistry and Radiology, MMRRCC, B1 Stellar Chance Laboratory, University of Pennsylvania, 422 Curie Blvd., Philadelphia, PA 19104, USA. eshapiro@sas.upenn.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.