Linked Life Data

3886610

Source:http://linkedlifedata.com/resource/pubmed/id/3886610

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1985-6-13
pubmed:abstractText
Two temperature probes (a fluoroptic sensor and a metallic thermistor), which are both suitable for stereotaxic implantation, were used in comparative thermometry studies during interstitial microwave heating of the brain in vivo. Thermal distributions having large temperature gradients (5-10 degrees C/cm) were routinely observed. The temperature differentials (delta T) between the 2 probes were position dependent within the thermal field. The maximum difference in temperatures measured, using the 2 probes along identical tracks without a catheter, ranged between 0.5 degree C and 1.8 degree C. Near the brain/air surface, the thermistor measured lower temperatures than the optical probe; however, medial to the antenna, the thermistor temperatures were higher than the optic sensor. The measured temperature discrepancies are the result of smearing due to thermal conduction along the axial length of the metallic thermistor probe. These effects are significantly accentuated when the temperature probes are tracked in catheters. Experiments performed in a nonperfused phantom, heated with the interstitial microwave antenna, demonstrated similar conductive effects. Studies in a nonelectromagnetic environment (flow cell-thermal step gradient) additionally confirmed that thermal conductive artifacts were the major source of temperature error.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0360-3016
pubmed:author
pubmed:issnType
Print
pubmed:volume
11
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
951-62
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Temperature measurements in high thermal gradients: I. The effects of conduction.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't