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FLAIR images of patients with head injuries Hideo TSURUSHIMA 1,4 , Kotoo MEGURO 1 , Mitsutoshi WADA 2 , Kiyoshi NARUSHIMA 1 , Yasushi NAGOTOMO 1 , Kensuke SUZUKI 1 , Kei NAKAI 1 , Yoshihiko YOSHII 3 , Tadao NOSE 3 1Department of Neurosurgery, Tsukuba Medical Center Hospital 2Department of Radiology, Tsukuba Medical Center Hospital 3Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba Keyword: magnetic resonance images , fluid-attenuated inversion recovery , cerebral contusion , diffuse axonal injury , traumatic subarachnoid hemorrhage pp.891-895
Published Date 1996/10/10
DOI https://doi.org/10.11477/mf.1436901280
  • Abstract
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FLAIR (fluid-attenuated inversion recovery) images are MR images obtained with an inversion recovery sequence, which has a long inversion time (TI) and a long echo time (TE). We examined 29 cases (49 gra-phics) of cerebral contusion, 11 cases (22 graphics) of diffuse axonal injury (DAI) and 11 cases (11 graphics) of traumatic subarachnoid hemorrhage (t-SAH) with FLAIR sequence consisting of a repetitive time (TR) of 6500 msec, TI of 1700 msec and TE of 110 msec, andthese graphics were compared with T2-weighted im-ages by spin-echo sequence (TR 2500 msec, TE 90 msec) and computed tomographic (CT) scans. Some le-sions of DAI were demonstrated more clearly with FLAIR images than with conventional T2-weighted images. Although contusion could be detected with FLAIR images as well as with conventional T2-weight-ed images, lesions adjacent to cerebral sulci were better delineated with FLAIR images. Because the cerebro-spinal fluid signals in cerebral sulci were low-intensity, FLAIR images were useful in detecting lesions of the cerebral cortex adjacent to cerebral sulci. Although it has been reported that detection of SAH is difficult with standard T1-and T2-weighted images, the pre-sence of t-SAH could be confirmed with FLAIR im-ages as seen in CT scans.


Copyright © 1996, 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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