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Japanese

MEASUREMENT OF LOCAL CEREBRAL BLOOD FLOW BY COMPUTERIZED TOMOGRAPHY WITH INHALATION OF STABLE XENON AND CURVE-FITTING METHOD Hajime Touho 1 , Jun Karasawa 1 , Hisashi Shishido 1 , Toshiaki Tazawa 1 , Keisuke Yamada 1 , Masaaki Asai 2 , Keisuke Kobayashi 2 , Hiroshi Yasue 2 , Masaaki Kagawa 2 , Yoshihiro Kuriyama 3 1Department of Neurosurgery, Osaka Neurological Institute 2Division of Radiology, Osaka Neurological Institute 3Department of Internal Medicine, Cerebrovascular Division, National Cardiovascular Center pp.665-672
Published Date 1988/7/1
DOI https://doi.org/10.11477/mf.1406206140
  • Abstract
  • Look Inside

Non-invasive methods are described for estima-ting local cerebal blood flows (LCBF) and local partition coefficients (Lλ) during inhalation of 30% stable xenon gas (Xe) in oxygen during CT scan-ning. After the denitrogenation with pure oxygenbreathing, 30% Xe is inhaled for four minutes to minimize subanesthetic effects with a rubber face-mask and the delivery system of Xe. Local time-Δ Hounsfield units curve during the Xe wash-in and wash-out phase is utilized in order to calculate Lλ and LCBF using a least squares curve fitting analy-sis. Calculated Lλ and LCBF with the new me-thod manifested reasonable distribution betweenthe grey and white matters, and reproducibility was excellent in our study. Several case studies of patients with cerebral infarction are presented to demonstrate the characterization of Lλ and LCBF patterns in various tissues and theoretical grounds underlying the new method of curve fitting analy-sis are discussed.


Copyright © 1988, 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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