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The Clinical Utility of MR Diffusion Tensor Imaging and Spatially Normalized PET to Evaluate Traumatic Brain Injury Patients with Memory and Cognitive Impairments Ayumi Okumura 1 , Yuuto Yasokawa 1,2 , Noriyuki Nakayama 1,2 , Kazuhiro Miwa 1 , Jun Shinoda 1 , Toru Iwama 2 1Chubu Medical Center for Prolonged Traumatic Brain Dysfunction Department of Neurosurgery, Kizawa Memorial Hospital 2Department of Neurosurgery, Gifu University School of Medicine Keyword: cingulum , diffuse axonal injury , DTI , eZIS , higher brain dysfunction pp.115-122
Published Date 2005/2/1
DOI https://doi.org/10.11477/mf.1406100014
  • Abstract
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We detected and compared abnormal brain areas using both MR diffusion tensor imaging(DTI) and easy Z score imaging system(eZIS) of FDG-PET for traumatic brain injury patients with memory and cognitive impairments. Twenty normal subjects and eighteen diffuse axonal injury patients with memory and cognitive impairments were studied with DTI and eZIS of 18F-FDG-PET. DTI contained fractional anisotorophy(FA) analysis and the tractography for the corpus callosum. After PET imaging was performed, statistical analysis using eZIS was undergone with followed processing steps, including smoothing, normalization and z transformation with respect to normal database. Z score map was superimposed on 3D MRI brain. Group analysis was performed using SPM. In diffuse axonal injury patients, the decline of FA was observed around the corpus callosum in comparison with normal subjects and the reduction of glucose metabolism was shown in the cingulated association. These results suggest that the reduction of metabolism within the cingulated cortex indicated deprived neuronal activation caused by the impaired neuronal connectivity that was revealed with DTI. Furthermore, the metabolic abnormalities within the cingulated cortex may be responsible for memory and cognitive impairments. DTI and spatially normalized PET have a role in neuroimaging interpretation for patients with memory and cognition impairments because its 3D better visualization allows objective and systematic investigation.

(Received : October 25, 2004)


Copyright © 2005, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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