NEURAL-NETWORK APPROACH TO CHARACTERIZATION OF CIRRHOTIC PARENCHYMAL ECHO PATTERNS

被引:0
|
作者
YOSHINO, SY
KOBAYASHI, A
YAHAGI, T
FUKUDA, H
EBARA, M
OHTO, M
机构
关键词
COMPUTER-AIDED DIAGNOSIS; IMAGE TEXTURE; LIVER CIRRHOSIS; NEURAL NETWORK APPLICATIONS; ULTRASONIC IMAGES;
D O I
暂无
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
We have classified parenchymal echo patterns of cirrhotic liver into four types, according to the size of hypoechoic nodular lesions. Neural network technique has been applied to the characterization of hepatic parenchymal diseases in ultrasonic B-scan texture. We employed a multi-layer feedforward neural network utilizing the back-propagation algorithm. We carried out four kinds of pre-processings for liver parenchymal pattern in the images. We describe the examination of each performance by these pre-processing techniques. We show four results using (1) only magnitudes of FFT pre-processing, (2) both magnitudes and phase angles, (3) data normalized by the maximum value in the dataset, and (4) data normalized by variance of the dataset. Among the 4 pre-processing data treatments studied, the process combining FFT phase angles and magnitudes of FFT is found to be the most efficient.
引用
收藏
页码:1316 / 1322
页数:7
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