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ID 16043
Eprint ID
16043
フルテキストURL
Thumnail 100_989.pdf 4.07 MB
タイトル(別表記)
Quantitative evaluation in Kr-81m gas ventilation study
著者
瀬尾 裕之 香川医科大学放射線医学教室
田邉 正忠 香川医科大学放射線医学教室
抄録
Kr-81m gas has been used as a ventilation imaging agent. Continuous Kr-81m gas inspiration reflects the distribution of regional ventilation, but quantitative evaluation is difficult because of the short half-life of the gas.We obtained lung flow time activity curves during steady-state Kr-81m gas inhalation. Each respiratory cycle was defined between successive maxima of inspiration. Temporal Fourier analysis was applied to Kr-81m gas time activity curves to determine the pulmonary maximum expiratory (PER) and inspiratory rates (PIR) of the first harmonic of a single composite respiratory cycle. After forced inspiration of a bolus of Kr-81m gas, the time constant was calculated from the expiration time activity curve which was corrected for physical decay. These results were compared with a pulmonary function test and Xe-133 washout phase. Correlation between PER, PIR and % VC was noted. The time constant correlated negatively with % FEV1 and positively with mean transit time (MTT) of Xe-133 gas in the washout phase. Dynamic ventilation study appears to be a potentially useful noninvasive technique to assess local lung function.
キーワード
Kr-81m gas
ventilation study
time constant
lung flow activity curve
発行日
1988
出版物タイトル
岡山医学会雑誌
出版物タイトル(別表記)
Journal of Okayama Medical Association
100巻
11-12号
出版者
岡山医学会
出版者(別表記)
Okayama Medical Association
開始ページ
989
終了ページ
995
ISSN
0030-1558
NCID
AN00032489
資料タイプ
学術雑誌論文
オフィシャル URL
https://www.jstage.jst.go.jp/article/joma1947/100/11-12/100_11-12_989/_article/-char/ja/
関連URL
http://www.okayama-u.ac.jp/user/oma/index.html
言語
Japanese
著作権者
岡山医学会
論文のバージョン
publisher
査読
有り
Eprints Journal Name
joma