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Focal Hepatic Lesions: Contrast-Enhancement Patterns at Pulse-Inversion Harmonic US using a Microbubble Contrast Agent
Korean Journal of Radiology ; : 224-233, 2003.
Artículo en Inglés | WPRIM | ID: wpr-214907
ABSTRACT

OBJECTIVE:

To analyze the contrast-enhancement patterns obtained at pulseinversion harmonic imaging (PIHI) of focal hepatic lesions, and to thus determine tumor vascularity and the acoustic emission effect. MATERIALS AND

METHODS:

We reviewed pulse-inversion images in 90 consecutive patients with focal hepatic lesions, namely hepatocellular carcinoma (HCC) (n=43), metastases (n=30), and hemangioma (n=17). Vascular and delayed phase images were obtained immediately and five minutes following the injection of a microbubble contrast agent. Tumoral vascularity at vascular phase imaging and the acoustic emission effect at delayed phase imaging were each classified as one of four patterns.

RESULTS:

Vascular phase images depicted internal vessels in 93% of HCCs, marginal vessels in 83% of metastases, and peripheral nodular enhancement in 71% of hemangiomas. Delayed phase images showed inhomogeneous enhancement in 86% of HCCs; hypoechoic, decreased enhancement in 93% of metastases; and hypoechoic and reversed echogenicity in 65% of hemangiomas. Vascular and delayed phase enhancement patterns were associated with a specificity of 91% or greater, and 92% or greater, respectively, and with positive predictive values of 71% or greater, and 85% or greater, respectively.

CONCLUSION:

Contrast-enhancement patterns depicting tumoral vascularity and the acoustic emission effect at PIHI can help differentiate focal hepatic lesions.
Asunto(s)

Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Páncreas / Polisacáridos / Estómago / Aumento de la Imagen / Reproducibilidad de los Resultados / Estudios Retrospectivos / Sensibilidad y Especificidad / Colon / Carcinoma Hepatocelular / Medios de Contraste Tipo de estudio: Estudio diagnóstico / Estudio observacional / Estudio pronóstico Límite: Adulto / Anciano / Femenino / Humanos / Masculino Idioma: Inglés Revista: Korean Journal of Radiology Año: 2003 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Páncreas / Polisacáridos / Estómago / Aumento de la Imagen / Reproducibilidad de los Resultados / Estudios Retrospectivos / Sensibilidad y Especificidad / Colon / Carcinoma Hepatocelular / Medios de Contraste Tipo de estudio: Estudio diagnóstico / Estudio observacional / Estudio pronóstico Límite: Adulto / Anciano / Femenino / Humanos / Masculino Idioma: Inglés Revista: Korean Journal of Radiology Año: 2003 Tipo del documento: Artículo