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Magnetic resonance imaging in 38 cases of acoustic tumors

Journal Article:

Abstract

The value of magnetic resonance imaging (MRI) in the diagnosis of acoustic tumors was retrospectively assessed in 38 cases. A 0.15 Tesla permanent magnet and a 1.5 Tesla superconducting magnet were employed in 24 and 14 cases, respectively. Gadolinium diethlene triamine pentaacetic acid (Gd-DTPA), a paramagnetic contrast agent, was used in 10 cases. Acoustic tumors were identified in all cases. Small, medium, and large tumors were depicted with equal clarity by MRI and computed tomography (CT). However, tumor contour and extension, accompanying cysts, and brainstem displacement were more clarly visualized on MRI. The use of Gd-DTPA improved the quality of the MR images by markedly enhancing the acoustic tumors in all cases. In particular, detection of small acoustic tumors and intra- or paratumoral cysts was facilitated by the use of Gd-DTPA. The possibility of a correlation between acoustic tumor histology and MRI features was studied by calculation of the contrast to noise (C/N) ratio in 10 cases of acoustic tumor and 7 cases of meningioma. No definite correlation was demonstrated, but there appeared to be some difference in the C/N ratio between acoustic tumors and meningiomas. In three volunteers, MRI demonstrated intracanalicular nerves, separately. Because of its higher resolution, MRI  More>>
Authors:
Publication Date:
Aug 01, 1989
Product Type:
Journal Article
Reference Number:
JPN-89-015223; EDB-90-028945
Resource Relation:
Journal Name: Neurologia Medico-Chirurgica; (Japan); Journal Volume: 29:8
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; AUDITORY ORGANS; NMR IMAGING; CAT SCANNING; DIAGNOSIS; DTPA; GADOLINIUM COMPOUNDS; IMAGES; NEOPLASMS; NERVE TISSUE; PATIENTS; AMINO ACIDS; ANIMAL TISSUES; BODY; CARBOXYLIC ACIDS; CHELATING AGENTS; COMPUTERIZED TOMOGRAPHY; DIAGNOSTIC TECHNIQUES; DISEASES; DRUGS; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANS; RADIOPROTECTIVE SUBSTANCES; RARE EARTH COMPOUNDS; SENSE ORGANS; TISSUES; TOMOGRAPHY; 550602* - Medicine- External Radiation in Diagnostics- (1980-)
OSTI ID:
5027907
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: ISSN 0387-2572; CODEN: NMCHB
Submitting Site:
JPN
Size:
Pages: 707-714
Announcement Date:
Feb 15, 1990

Journal Article:

Citation Formats

Uchino, Masafumi, Ohtsuka, Takashi, Seiki, Yoshikatsu, Matsumoto, Mikiro, Shibata, Iekado, Terao, Hideo, Kohno, Takeshi, Sanpei, Kenji, and Mano, Isamu. Magnetic resonance imaging in 38 cases of acoustic tumors. Japan: N. p., 1989. Web.
Uchino, Masafumi, Ohtsuka, Takashi, Seiki, Yoshikatsu, Matsumoto, Mikiro, Shibata, Iekado, Terao, Hideo, Kohno, Takeshi, Sanpei, Kenji, & Mano, Isamu. Magnetic resonance imaging in 38 cases of acoustic tumors. Japan.
Uchino, Masafumi, Ohtsuka, Takashi, Seiki, Yoshikatsu, Matsumoto, Mikiro, Shibata, Iekado, Terao, Hideo, Kohno, Takeshi, Sanpei, Kenji, and Mano, Isamu. 1989. "Magnetic resonance imaging in 38 cases of acoustic tumors." Japan.
@misc{etde_5027907,
title = {Magnetic resonance imaging in 38 cases of acoustic tumors}
author = {Uchino, Masafumi, Ohtsuka, Takashi, Seiki, Yoshikatsu, Matsumoto, Mikiro, Shibata, Iekado, Terao, Hideo, Kohno, Takeshi, Sanpei, Kenji, and Mano, Isamu}
abstractNote = {The value of magnetic resonance imaging (MRI) in the diagnosis of acoustic tumors was retrospectively assessed in 38 cases. A 0.15 Tesla permanent magnet and a 1.5 Tesla superconducting magnet were employed in 24 and 14 cases, respectively. Gadolinium diethlene triamine pentaacetic acid (Gd-DTPA), a paramagnetic contrast agent, was used in 10 cases. Acoustic tumors were identified in all cases. Small, medium, and large tumors were depicted with equal clarity by MRI and computed tomography (CT). However, tumor contour and extension, accompanying cysts, and brainstem displacement were more clarly visualized on MRI. The use of Gd-DTPA improved the quality of the MR images by markedly enhancing the acoustic tumors in all cases. In particular, detection of small acoustic tumors and intra- or paratumoral cysts was facilitated by the use of Gd-DTPA. The possibility of a correlation between acoustic tumor histology and MRI features was studied by calculation of the contrast to noise (C/N) ratio in 10 cases of acoustic tumor and 7 cases of meningioma. No definite correlation was demonstrated, but there appeared to be some difference in the C/N ratio between acoustic tumors and meningiomas. In three volunteers, MRI demonstrated intracanalicular nerves, separately. Because of its higher resolution, MRI can be expected to replace CT and air CT in the diagnosis of acoustic tumors. (author).}
journal = {Neurologia Medico-Chirurgica; (Japan)}
volume = {29:8}
journal type = {AC}
place = {Japan}
year = {1989}
month = {Aug}
}