Dynamic Gd-enhanced MR imaging of hepatic hemangioma: is high temporal resolution requisite for characterization?
Magn Reson Imaging
; 14(1): 31-41, 1996.
Article
em En
| MEDLINE
| ID: mdl-8656988
ABSTRACT
We assessed the value of high temporal resolution in the dynamic characterization of hepatic hemangioma with use of magnetization-prepared gradient-echo (MP-GRE) imaging. Single-level inversion recovery incremental flip angle MP-GRE images were obtained in 26 patients with 34 hemangiomas before and at a repetition rate of 30 images/min after injection of Gd-DTPA without breath-holding. Enhancement patterns and temporal changes thereof were analyzed. Hemangiomas were categorized as small ( < 2.0 cm), medium (2.0-5.0 cm), and large ( > 5 cm) lesions. Classic early peripheral nodular enhancement (PNE) with progressive hyperintense fill-in was observed in 31 lesions (91%). Two of 10 small and 1 of 20 medium lesions showed complete fill-in within 10 s, and three small and one medium lesions within 45 s after the onset of PNE. In no cases of hemangioma was immediate homogenous hyperintensity observed without preceding PNE. In conclusion, temporal resolution of less than 10 s is a prerequisite for confident dynamic characterization of some hemangiomas, predominantly small hemangiomas.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostos Organometálicos
/
Imageamento por Ressonância Magnética
/
Meios de Contraste
/
Ácido Pentético
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Hemangioma
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Neoplasias Hepáticas
Limite:
Humans
Idioma:
En
Revista:
Magn Reson Imaging
Ano de publicação:
1996
Tipo de documento:
Article