Noninvasive detecting the focal cerebral ischemia

Zhang Jiwu, Zheng Chongxun, Tao Weizhong, Xie An, Hao Lei, Nitish V. Thakor

Research output: Contribution to journalConference articlepeer-review


The study shows that the time-frequency distribution of Somatosensory Evoked Potential (SEP) is very sensitive to the cerebral ischemia. SD rats are used for animal experiment, a model for SD rat focal ischemic cerebral injury is presented. Then based on the Discrete Gabor Spectrogram (DGS), SEP signal from the animal experiment is analyzed. Center of power (COP) and weight center of power (WCOP) is defined. The study proves that the time-frequency feature of SEP signals on ischemic region is obviously different from normal region, can be clearly distinguished by analyzing their SEP signals in time-frequency domain. The injury extent can also be detected by analyzing their time-frequency feature. Our study may result in a quantitative method to detect focal ischemic cerebral injury in the earlier phases.

Original languageEnglish (US)
Pages (from-to)1328-1331
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
StatePublished - Dec 1 1997
Externally publishedYes
EventProceedings of the 1997 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Chicago, IL, USA
Duration: Oct 30 1997Nov 2 1997

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics


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