Dynamic contrast-enhanced imaging of the wrist in rheumatoid arthritis: dedicated low-field (0.25-T) versus high-field (3.0-T) MRI.
Skeletal Radiol
; 44(8): 1095-101, 2015 Aug.
Article
em En
| MEDLINE
| ID: mdl-25715838
ABSTRACT
OBJECTIVE:
To compare the assessment of wrist synovitis severity, synovial volume and synovial perfusion parameters on a dedicated low-field (0.25-T) to that of a high-field (3-T) whole-body MR system in patients with rheumatoid arthritis (RA).METHODS:
Twenty-one patients (mean age 50.0 ± 9.8 years) with active RA were recruited prospectively. Dynamic contrast-enhanced MRI examination of the most severely affected wrist was performed at both 0.25 T and 3 T. Three MRI-derived parameters, synovitis severity (RAMRIS grade), synovial volume (ml(3)) and synovial perfusion indices (maximum enhancement and enhancement slope), were compared.RESULTS:
Comparing 0.25- and 3-T MRI, there was excellent agreement for semiquantitative assessment (r 0.80, p < 0.00001) of synovitis (RAMRIS) as well as quantitative assessment (r 0.94, p < 0.00001) of synovial volume. Good agreement for synovial Emax (r 0.6, p = 0.002) and fair agreement (r 0.5, p = 0.02) for synovial Eslope was found.CONCLUSIONS:
Imaging of the RA wrist at 0.25 T yields excellent correlation with 3 T with regard to the synovitis activity score (RAMRIS) and synovial volume measurement. Fair to good correlation between low- (0.25-T) and high-field (3-T) MR systems was found for perfusion parameters, being better for Emax than for Eslope.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostos Organometálicos
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Artrite Reumatoide
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Sinovite
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Articulação do Punho
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Imageamento por Ressonância Magnética
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Aumento da Imagem
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Meglumina
Tipo de estudo:
Diagnostic_studies
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Evaluation_studies
Limite:
Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Skeletal Radiol
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
China