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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
7
|
pubmed:dateCreated |
1995-2-2
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pubmed:abstractText |
It is shown that some of the threads used in Doppler phantoms have a repetitive structure which leads to peaks in the angular distribution of the backscattered power at beam axis-to-flow angles of theta = 90 degrees and approximately theta = 70 degrees. This nonuniform scattering does not significantly interfere with modelling the Doppler spectrum peak as a function of velocity and beam-to-thread angle, but makes it impossible to model the spectral width as a function of these parameters. A new plaited structure is described which has a periodicity too small to lead to subsidiary reflection peaks, and which has a more uniform backscattering profile than the other threads studied.
|
pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:status |
MEDLINE
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pubmed:issn |
0301-5629
|
pubmed:author | |
pubmed:issnType |
Print
|
pubmed:volume |
20
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
601-10
|
pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading | |
pubmed:year |
1994
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pubmed:articleTitle |
On the spectral properties of Doppler thread phantoms.
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pubmed:affiliation |
Inserm, Unité 281, Lyon, France.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
|