Diffusivity of intraorbital lymphoma vs. inflammation: comparison of single shot turbo spin echo and multishot echo planar imaging techniques.
Eur Radiol
; 28(1): 325-330, 2018 Jan.
Article
em En
| MEDLINE
| ID: mdl-28779398
ABSTRACT
PURPOSE:
To compare the abilities of turbo spin-echo diffusion-weighted imaging (TSE DWI) and multi-shot echo planar DWI (MSh DWI) to discriminate orbital lymphoma from inflammatory lesions. MATERIALS ANDMETHODS:
Twenty-nine patients with pathologically confirmed lymphomas and 39 patients with inflammation were imaged with a 3.0-T system. The apparent diffusion coefficient (ADC) of each lesion was measured. Signal intensities compared to normal grey matter on conventional imaging were also measured.RESULTS:
The ADCs derived from the TSE DWI of the lymphomas (0.68 ± 0.14 × 10-3 mm2/s) were significantly lower than those of the inflammation cases (1.04 ± 0.39 × 10-3 mm2/s; p < 0.001). The ADCs derived from MSh DWI could not be used to separate the lymphomas from the inflammation (1.16 ± 0.43 × 10-3 mm2/s vs. 1.36 ± 0.48 × 10-3 mm2/s; p = 0.06). Conventional sequences also could not separate the lymphomas from the inflammation (p > 0.05). The ROC analysis showed the best diagnostic performance with ADCs derived from TSE DWI (the area under the curve AUC = 0.831) followed by ADC derived from MSh DWI (AUC = 0.633).CONCLUSION:
The ADCs derived from TSE DWI might help to differentiate orbital lymphomas from inflammation. KEY POINTS ⢠ADC of lymphoma was significantly lower than that of inflammation. ⢠ADC derived from TSE DWI showed the best diagnostic performance. ⢠This study was conducted by a 3-T MR scanner.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
/
Tipos_de_cancer
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Outros_tipos
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Orbitárias
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Imagem Ecoplanar
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Imagem de Difusão por Ressonância Magnética
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Inflamação
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Linfoma
Tipo de estudo:
Diagnostic_studies
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Observational_studies
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Prognostic_studies
Limite:
Adult
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Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Eur Radiol
Assunto da revista:
RADIOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Japão