Evaluation of the Tumor-brain Interface of Intracranial Meningiomas on MR Imaging including FLAIR Images
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概要
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Purpose: The usefulness of fluid-attenuated inversion recovery (FLAIR) imaging for the evaluation of brain diseases has been reported. The purpose of this study was to evaluate the brain-meningioma interface with MRI including FLAIR imaging. Materials and methods: This study involved 48 patients with 50 intracranial meningiomas. We retrospectively evaluated the brain-meningioma interface by various imaging method including FLAIR. If a thin layer with a signal intensity different from that of the tumor and brain was observed in the areas of the tumor-brain interface in T1-weighted IR (T1WIR) and T2-weighted turbo SE (T2WTSE) images, we defined this structure as the rim. The presence or absence of the rim and the signal intensity were evaluated, and the length and the signal intensity of the rim observed with FLAIR and contrast-enhanced T1WIR (CE-T1WIR) images were evaluated. Results: In 35 of the 50 lesions (70.0%), the rim was observed in the tumor-brain interface as a layer of low signal intensity in T1WIR images and high signal intensity in T2WTSE images. In 13 lesions (26.0%), no rim was detected. Flow voids were observed at the tumor-brain interface in 20 of the 50 lesions (40.0%). No rim showed a low signal intensity of the tumor-brain interface in both T1WIR and T2WTSE images. The rim exhibited an iso-to-high signal intensity compared to the tumor parenchyma in FLAIR images and an enhanced signal intensity in CE-T1WIR images. In contrast to T1WIR images, the rim in FLAIR images tended to be identified across the entire circumference. Conclusion: The rim at the brain-meningioma interface revealed as low signal intensity in T1WIR images and high signal intensity in T2WTSE images, which was conventionally considered to be the CSF cleft, was often revealed in FLAIR images as high signal intensity compared to the tumor parenchyma, and an enhanced signal intensity in CE-T1WIR images. Therefore, the presence of CSF in such rims is unlikely, and the rims might reflect the capsule structure of the tumor surface.
- 日本磁気共鳴医学会の論文
- 2003-12-31
著者
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OHNISHI Takanori
Department of Neurosurgery, Osaka University Medical School
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Mochizuki T
Department Of Radiology Ehime University School Of Medicine Shitsukawa
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OHUE Shiro
Department of Neurosurgery, Ehime University Graduate School of Medicine
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KIKUCHI Keiichi
Department of Radiology, Ehime University Graduate School of Medicine
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MIKI Hitoshi
Department of Radiology, Ehime University Graduate School of Medicine
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Mochizuki Teruhito
Department Of Radiology Ehime University School Of Medicine Shitsukawa
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SHIMIZU Teruhiko
Department of Radiology, Ehime University School of Medicine
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TAKEGUCHI Takashi
Department of Radiology, Ehime University School of Medicine
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Ohue Shiro
Department Of Neurosurgery Ehime University Graduate School Of Medicine
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Ohue Shiro
Departments Of Neurological Surgery Ehime University School Of Medicine
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Ohue Shiro
Department Of Neurological Surgery Ehime University School Of Medicine
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Miki Hitoshi
Department Of Radiology Ehime University Graduate School Of Medicine
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Miki Hitoshi
Department Of Cardiology Ehime Prefectural Imabari Hospital
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Miki Tetsuro
Department Of Radiology Ehime University School Of Medicine Shitsukawa
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Mochizuki Teruhito
Department Of Cardiology Matsuyama Red Cross Hospital
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Mochizuki Teruhito
Department Of Radiology Ehime University School Of Medicine
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Kikuchi Keiichi
Department Of Radiology Ehime University Graduate School Of Medicine
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Kikuchi Keiichi
Department Of Diagnostic And Therapeutic Radiology Ehime University Graduate School Of Medicine
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Shimizu Teruhiko
Department Of Radiology Ehime University School Of Medicine
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Ohnishi Takanori
Department Of Neurosurgery Ehime University Graduate School Of Medicine
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Ohnishi Takanori
Department Of Neurological Surgery Ehime University School Of Medicine
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Takeguchi Takashi
Department Of Radiology Ehime University School Of Medicine
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Miyazaki T
Department Of Pathology Ehime University School Of Medicine
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Kikuchi Keiichi
Department Of Radiology Ehime University School Of Medicine
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Ohue Shiro
Department Of Neurosurgery Ehime University School Of Medicine
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