Recurrent hepatocellular carcinoma versus radiation-induced hepatic injury: differential diagnosis with MR imaging.
Magn Reson Imaging
; 19(1): 41-6, 2001 Jan.
Article
en En
| MEDLINE
| ID: mdl-11295345
The objective of this study was to assess the value of MR imaging in the differentiation between a recurrent hepatocellular carcinoma (HCC) and a radiation-induced hepatic injury. Nine male patients with suspected recurrence after radiotherapy for HCC underwent T(2)-, T(1)-weighted imaging and Gd-DTPA enhanced dynamic studies. T(2) relaxation times, signal intensity ratios in T(1)-weighted images (WI) and the relative enhancement of the dynamic study were calculated. Recurrent tumors and the irradiated area showed similar image characteristics: hypointense in T(1)-WI and hyperintense in T(2)-WI. T(2) values and signal intensity ratios in the T(1)-WI were not significantly different. In the gadolinium-enhanced dynamic study, a recurrent HCC showed early enhancement, followed by a rapid washout. However, the irradiated liver parenchyma showed hyperintensity from an early phase, and contrast enhancement tended to be more prominent and prolonged at the end of the dynamic studies. The characteristic findings of the dynamic MR study enable us to distinguish between a recurrent HCC and a radiation-induced hepatic injury.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Traumatismos por Radiación
/
Imagen por Resonancia Magnética
/
Carcinoma Hepatocelular
/
Hígado
/
Neoplasias Hepáticas
Tipo de estudio:
Diagnostic_studies
Límite:
Aged
/
Humans
/
Male
Idioma:
En
Revista:
Magn Reson Imaging
Año:
2001
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Países Bajos