[Application of power spectral entropy to the noninvasive detection of focal ischemic cerebral injury].
A model of SD rat focal ischemic cerebral injury is presented for use in noninvasively detecting both the extent and the location of focal ischemic cerebral injury. EEG signals of ischemic region and normal region are recorded from the moment before ischemia to 30 minutes after ischemia. Then the Power Spectral Entropy(PSE) analysis of EEG is performed. Results show that the PSE of EEG signals changes greatly as a result of focal ischemic cerebral injury. The PSE of EEG signal of ischemic region is less than that before ischemia as the ischemia lasts 15 minutes. The PSE of EEG signals of ischemic region is much less than that of normal region. These indicate that the power spectral entropy of EEG signal is a good index of focal ischemic cerebral injury and the method of power spectral entropy analysis is simple and effective.
Wu
Haojiang
H
Institute of Biomedical Engineering, School of Life Sciences and Techniques, Xi'an Jiaotong University, Xi'an 710049.
Zhang
Hui
H
Zheng
Chongxun
C
Kong
Jinsheng
J
D000818:Animals; D002545:Brain Ischemia / Q000175:diagnosis*; D004195:Disease Models, Animal; D004569:Electroencephalography; D019277:Entropy; D005260:Female; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D012815:Signal Processing, Computer-Assisted