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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3 Pt 1
|
pubmed:dateCreated |
1990-3-27
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pubmed:abstractText |
This prospective study evaluated the effect of trabecular bone on the appearance of marrow in gradient-echo (GRE) images of the appendicular skeleton in vivo at high magnetic field strength. Magnetic resonance (MR) imaging of 10 normal extremities in five patients was performed with spin-echo (SE) and GRE sequences. The latter were obtained with gradient recalled acquisition in a steady state. SE and GRE sequences had identical spacing and planes of imaging. Cortical bone appeared as a signal void regardless of the pulse sequences and parameters. Marrow in contact with trabecular bone exhibited a shortened effective transverse relaxation time (T2*) and resultant signal loss because of local field inhomogeneities where mineralized matrix interfaced with it. This T2* effect was increased in regions with more trabecular bone (epiphysis) than regions with little trabecular bone (diaphysis). A low signal intensity on GRE images may represent fatty marrow with a high content of trabecular bone and should not be interpreted only as hematopoietic marrow.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
AIM
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pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
0033-8419
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
174
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
855-9
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading | |
pubmed:year |
1990
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pubmed:articleTitle |
Effect of trabecular bone on the appearance of marrow in gradient-echo imaging of the appendicular skeleton.
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pubmed:affiliation |
Department of Diagnostic Radiology, Stanford University Medical Center, CA 94305-5105.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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