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Magnetic Resonance Imaging of Supratentorial and Parafalcial Subdural Empyema Yukio TAKAMURA 1 , Teiji UEDE 1 , Koji IGARASHI 1 , Koshi TATEWAKI 1 1Department of Neurosurgery, Kushiro City General Hospital Keyword: Subdural abscess , Supratentorial lesion , Parafalcial lesion , Magnetic resonance imaging pp.61-64
Published Date 1995/1/10
DOI https://doi.org/10.11477/mf.1436900966
  • Abstract
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The authors report the MR imaging of two patients with mutltiple subdural empyemas, including one in the interhemispheric fissure.

MRI demonstrated convexity and interhemispheric collections which were mild hyperintense relative to CSF, hypointense relative to gray and white matter on T1W1, and marked hyperintense relative to CSF, and brain on T2W1. On the basis of signal intensity differ-ences, MRI can distinguish subdural empyemas from most sterile effusions and chronic subdural hematomas with similar CT appearances. MRI was found to be clearly more sensitive to subdural empyemas than CT, though such lesions missed on CT were considered to be relevant. MR was superior to CT in demonstrating the nature, presence, and extent of these lesions. In both cases, the capsule of the lesions demonstrated en-hancement, and connection between each lesion was obvious on contrast-enhanced MRI. It seems that con-rast-enhanced MR image may detect encapsulation of an abscess which can not be detected from conrast-enhanced CT.

We emphasized that the most significant factor in the successful surgical management of multiple subdural empyema, particularly including interhemisperic collec-tions is the accurate location of pus. This can be reli-ably achieved with MR imaging.


Copyright © 1995, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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