Magnetic resonance imaging of acoustic neuromas: the role of gadolinium-DTPA.
Br J Radiol
; 61(729): 800-5, 1988 Sep.
Article
em En
| MEDLINE
| ID: mdl-3179642
ABSTRACT
Magnetic resonance imaging (MRI) was performed in 20 patients with evidence on computed tomography (CT) of 21 acoustic neuromas before and after intravenous administration (0.1-0.2 mmol/kg body weight) of gadolinium-diethylene-triamine-pentaacetic acid (Gd-DTPA). Multi-section spin-echo (SE) sequences of varying repetition (TR) and echo (TE) times were performed in the transverse and coronal planes with a section thickness of 10 mm. All acoustic neuromas displayed marked enhancement on the T1-weighted (short TR/TE) SE sequence post-Gd-DTPA. The intrameatal component was particularly well demonstrated compared with non-enhanced magnetic resonance (MR) images and contrast-enhanced CT. Identification of intrameatal tumour was difficult on T2-weighted SE images and one tumour was not identified on the T1-weighted SE sequence prior to Gd-DTPA. Four of five intrameatal tumours measuring less than 8 mm could only be demonstrated on CT by using CT air meatography. Extrameatal tumour extension was demonstrated on contrast-enhanced CT, although the assessment of brain-stem involvement and displacement was not as clearly seen as on coronal MR images. In two patients with large acoustic neuromas and a cyst, the true relationship of the cyst to the tumour could only be identified on the post-Gd-DTPA scan. Magnetic resonance imaging with gadolinium-DTPA is a relatively quick, safe, well tolerated and effective method for the diagnosis of acoustic neuroma.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostos Organometálicos
/
Neuroma Acústico
/
Meios de Contraste
/
Ácido Pentético
/
Gadolínio
Tipo de estudo:
Clinical_trials
/
Prognostic_studies
Limite:
Adolescent
/
Adult
/
Aged
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Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Br J Radiol
Ano de publicação:
1988
Tipo de documento:
Article