Ontology type: schema:ScholarlyArticle
2011-09-20
AUTHORSChristian Buchbender, Axel Scherer, Patric Kröpil, Birthe Körbl, Michael Quentin, Dorothea Ch. Reichelt, Rotem S. Lanzman, Christian Mathys, Dirk Blondin, Bernd Bittersohl, Christoph Zilkens, Matthias Hofer, Hans-Jörg Wittsack, Matthias Schneider, Gerald Antoch, Benedikt Ostendorf, Falk Miese
ABSTRACTPurposeTo prospectively evaluate four non-invasive markers of cartilage quality—T2* mapping, native T1 mapping, dGEMRIC and ΔR1—in healthy volunteers and rheumatoid arthritis (RA) patients.Materials and methodsCartilage of metacarpophalangeal (MCP) joints II were imaged in 28 consecutive subjects: 12 healthy volunteers [9 women, mean (SD) age 52.67 (9.75) years, range 30–66] and 16 RA patients with MCP II involvement [12 women, mean (SD) age 58.06 (12.88) years, range 35–76]. Sagittal T2* mapping was performed with a multi-echo gradient-echo on a 3 T MRI scanner. For T1 mapping the dual flip angle method was applied prior to native T1 mapping and 40 min after gadolinium application (delayed gadolinium-enhanced MRI of cartilage, dGEMRIC, T1Gd). The difference in the longitudinal relaxation rate induced by gadolinium (ΔR1) was calculated. The area under the receiver operating characteristic curve (AROC) was used to test for differentiation of RA patients from healthy volunteers.ResultsdGEMRIC (AUC 0.81) and ΔR1 (AUC 0.75) significantly differentiated RA patients from controls. T2* mapping (AUC 0.66) and native T1 mapping (AUC 0.66) were not significantly different in RA patients compared to controls.ConclusionsThe data support the use of dGEMRIC for the assessment of MCP joint cartilage quality in RA. T2* and native T1 mapping are of low diagnostic value. Pre-contrast T1 mapping for the calculation of ΔR1 does not increase the diagnostic value of dGEMRIC. More... »
PAGES685-692
http://scigraph.springernature.com/pub.10.1007/s00256-011-1276-2
DOIhttp://dx.doi.org/10.1007/s00256-011-1276-2
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/21932053
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"description": "PurposeTo prospectively evaluate four non-invasive markers of cartilage quality\u2014T2* mapping, native T1 mapping, dGEMRIC and \u0394R1\u2014in healthy volunteers and rheumatoid arthritis (RA) patients.Materials and methodsCartilage of metacarpophalangeal (MCP) joints II were imaged in 28 consecutive subjects: 12 healthy volunteers [9 women, mean (SD) age 52.67 (9.75) years, range 30\u201366] and 16 RA patients with MCP II involvement [12 women, mean (SD) age 58.06 (12.88) years, range 35\u201376]. Sagittal T2* mapping was performed with a multi-echo gradient-echo on a 3\u00a0T MRI scanner. For T1 mapping the dual flip angle method was applied prior to native T1 mapping and 40\u00a0min after gadolinium application (delayed gadolinium-enhanced MRI of cartilage, dGEMRIC, T1Gd). The difference in the longitudinal relaxation rate induced by gadolinium (\u0394R1) was calculated. The area under the receiver operating characteristic curve (AROC) was used to test for differentiation of RA patients from healthy volunteers.ResultsdGEMRIC (AUC 0.81) and \u0394R1 (AUC 0.75) significantly differentiated RA patients from controls. T2* mapping (AUC 0.66) and native T1 mapping (AUC 0.66) were not significantly different in RA patients compared to controls.ConclusionsThe data support the use of dGEMRIC for the assessment of MCP joint cartilage quality in RA. T2* and native T1 mapping are of low diagnostic value. Pre-contrast T1 mapping for the calculation of \u0394R1 does not increase the diagnostic value of dGEMRIC.",
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