Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Evaluation of Stimulus Strategy for Cochlear Implant Using Neurogram

Neurogram을 이용한 인공와우 자극기법 평가 연구

  • Yang, Hyejin (Biomedical Engineering, School of Electrical Engineering, University of Ulsan) ;
  • Woo, Jihwan (Biomedical Engineering, School of Electrical Engineering, University of Ulsan)
  • 양혜진 (울산대학교 의공학과, 울산대학교 전기공학부) ;
  • 우지환 (울산대학교 의공학과, 울산대학교 전기공학부)
  • Received : 2013.02.13
  • Accepted : 2013.03.30
  • Published : 2013.04.30
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Abstract

Electrical stimulation is delivered to auditory nerve (AN) through the electrodes in cochlear implant system. Neurogram is a spectrogram that includes information of neural response to electrical stimulation. We hypothesized that the similarity between a neurogram and an input-sound spectrogram could show how well a cochlear implant system works. In this study, we evaluated electrical stimulus configuration of CIS strategy using the computational model. The computational model includes stochastic property and anatomical features of cat auditory nerve fiber. To evaluate similarity between a neurogram and an input-sound spectrogram, we calculated Structural Similarity Index (SSIM). The results show that the dynamic range and the stimulation rate per channel influenced SSIM. Finally, we suggested the optimal configuration within the given stimulus CIS. We expect that the results and the evaluating procedure could be employed to improve the performance of a cochlear implant system.

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References

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