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
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Uchino, Masafumi;
Ohtsuka, Takashi;
Seiki, Yoshikatsu;
Matsumoto, Mikiro;
Shibata, Iekado;
Terao, Hideo;
[1]
Kohno, Takeshi;
Sanpei, Kenji;
Mano, Isamu
- Toho Univ., Tokyo (Japan). School of Medicine
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 = []
volume = {29:8}
journal type = {AC}
place = {Japan}
year = {1989}
month = {Aug}
}
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 = []
volume = {29:8}
journal type = {AC}
place = {Japan}
year = {1989}
month = {Aug}
}