小坂田 元太¹, 篠山 重威¹, 河合 忠一¹, 琴浦 肇², 平川 顕名³, 英保 茂⁴, 桑原 道義⁴

Genta OSAKADA¹, Shigetake SASAYAMA¹, Chuichi KAWAI¹, Hajime KOTOURA², Akina HIRAKAWA³, Shigeru EIHO⁴, Michiyoshi KUWAHARA⁴

¹京都大学医学部第三内科, ²京都大学医学部附属病院中央検査部, ³京都大学医学部附属病院中央情報処理部, ⁴京都大学工学部オートメーション研究施設

¹The Third Division, Department of Internal Medicine, Faculty of Medicine, Kyoto University, ²Central Clinical Laboratory, Kyoto University Hospital, ³The Division of Biomedical Information Science, Kyoto University Hospital, ⁴Automation Research Laboratory, Kyoto University

キーワード : echocardiography, computer analysis, on-line processing, cardiac function, echocardiometry

The on-line image processing system of echocardiogram has been developed by feeding an electric echo signal directly into the mini-computer through analog to digital converter with sampling rate of 2 MHz and 8-bit resolution.
The edges of left ventricular posterior wall and interventricular septum were determined automatically by a computer tracing of the echo signals. The chamber diameter and wall thickness were subsequently obtained. The shortening characteristics of left ventricle could also be assessed by volume and velocity data.
The techniques described will provide the rapid and accurate method for clinical assessment of cardiac function.