Methods for automatic extraction of left ventricular endocardium in echocardiograms have been proposed, which are required to quantitatively evaluate the functional performance of the left ventricle. In this pa-per, we propose a new automatic extraction method based on double thresholding for echocardiograms, and evaluate the effectiveness and the accuracy. B-mode echocardiograms are first binarized with a threshold determined by the discriminant analysis for the gray level histogram. Then the binary images are contracted n times to remove small regions and to disconnect the region of cardiac cavity from the other false regions. Among the obtained regions which corresponds to the cardiac cavity is selected and dilated 2n times to create a mask which restricts the region of the second thresholding operation. The size and the location of the cardiac cavity in the preceding frame are utilized to select the corresponding region. The masked image of each frame is binarized in the restricted area in the same way as in the first thresholding operation. The evaluation test is carried out using the scatter diagram of radius of contours extracted by two observers and automatic extraction method. These results showed that the accuracy of the extracted contours was favorably compared to the accuracy of manually traced contours.
雑誌名
電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society
巻
121
号
9
ページ
1448 - 1456
発行年
2001-09-01
ISSN
0385-4221
書誌レコードID
AN10065950
権利
電気学会ホームページ
フォーマット
application/pdf
著者版フラグ
publisher
日本十進分類法
007
その他のタイトル
Automatic extraction of left ventricular endocardium in echocardiograms using double thresholding method
2重しきい値法を用いた超音波心断層像からの心内膜輪郭線自動抽出とその信頼性の検討
40A12217.pdf
(5.18MB)
