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Nihon Igaku Hoshasen Gakkai Zasshi ; 64(1): 31-4, 2004 Jan.
Artigo em Japonês | MEDLINE | ID: mdl-14994508

RESUMO

PURPOSE: To evaluate the image quality and vascular selectivity of MR venography of the head using an MP-RAGE technique when obtained with a body radiofrequency transmitter coil system. MATERIALS AND METHODS: A total of 24 patients were imaged with a head or body RF transmission system. Subtraction MRA was processed with 0.1 mmol Gd-DTPA administration, and signal-to-noise ratios of the vascular system were measured. Venous demonstration and selectivity were also assessed. RESULTS: MP-RAGE MR venography with a body transmission system showed almost the same signal intensity for the venous and arterial systems, resulting in nonspecific vascular demonstration, while the head transmission system showed semi-selective venograms owing to inflow-induced high signal on precontrast images. However, MRA with a body transmission system provided a 1.5- to 2.5-fold higher signal-to-noise ratios based on higher gradient performance and excellent demonstration of the head veins, especially those below the skull base. CONCLUSION: Although selective venography was difficult, MRA with a body transmission coil provided excellent vascular images of the brain.


Assuntos
Veias Cerebrais/patologia , Imagem Ecoplanar/métodos , Gadolínio DTPA , Aumento da Imagem , Angiografia por Ressonância Magnética/métodos , Feminino , Cabeça/patologia , Humanos , Masculino , Pessoa de Meia-Idade
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