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英文誌(2004-)

Journal of Medical Ultrasonics

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1981 - Vol.8

Vol.8 No.04

Original Article(原著)

(0305 - 0311)

超音波心長軸断層像の自動処理による局所収縮動態の解析

Automatic Processing of Two-dimensional Echocardiography of Long-axis View for analysis of Regional Left Ventricular Function

高橋 正明1, 篠山 重威2, 小坂田 元太1, 中村 正治2, 山元 明子2, 神奈木 俊子2, 河合 忠一2, 浅田 尚紀3, 英保 茂3, 桑原 道義3

Masaaki TAKAHASHI1, Sigetake SASAYAMA2, Genta OSAKADA1, Masaharu NAKAMURA2, Akiko YAMAMOTO2, Toshiko KANNAGI2, Chuichi KAWAI2, Naoki ASADA3, Shigeru EIHO3, Michiyoshi KUWAHARA3

1京都大学医学部附属病院検査部, 2京都大学医学部第三内科, 3京都大学工学部オートメーション研究施設

1Central Clinical Laboratory, Kyoto University Hospital, 2The Third Division, Department of Internal Medicine, Kyoto University Hospital, 3Automation Research Laboratory, Kyoto University

キーワード : regional left ventricular function, two-dimensional echocardiography, three dimensional display, automatic image processing, left ventricle

Automatic image processing system of two-dimensional echocardiograms has been developed for analysis of regional left ventricular function. Echocardiogram of the apical long-axis view, which was directly recorded on video tape, was transferred to a minicomputer through an analog-digital converter. Endocardial margin was automatically traced along the peak points of the echo signals. Each image was superimposed and 128 radial grids were drawn from the center of gravity of end-diastolic left ventricle to the endocardial margin and the length of each grid line was measured, which provided quantitative description of the regional wall motion over the entire circumference.
We have also developed a method of reconstructing left ventricle in the three dimensions from six long-axis views obtained by rotating the probe at 30° intervals in the apical region. After superimposing the images, the centripetal motion from the endocardial surface to the center of spatial gravity of end-diastolic left ventricle, which was expressed as percent shortening was evaluated. This two- and three-dimensional image processing system provide quantitative evaluation of regional left ventricular function and estimation of extent of myocardial injury.