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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Evaluation of Robust Classifier Algorithm for Tissue Classification under Various Noise Levels

  • Youn, Su Hyun (Department of Bio-Mechatronic Engineering, Sungkyunkwan University) ;
  • Shin, Ki Young (Department of Energy and Power Conversion Engineering, University of Science & Technology) ;
  • Choi, Ahnryul (Department of Bio-Mechatronic Engineering, Sungkyunkwan University) ;
  • Mun, Joung Hwan (Department of Bio-Mechatronic Engineering, Sungkyunkwan University)
  • Received : 2016.02.19
  • Accepted : 2016.09.19
  • Published : 2017.02.01
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Abstract

Ultrasonic surgical devices are routinely used for surgical procedures. The incision and coagulation of tissue generate a temperature of $40^{\circ}C-150^{\circ}C$ and depend on the controllable output power level of the surgical device. Recently, research on the classification of grasped tissues to automatically control the power level was published. However, this research did not consider the specific characteristics of the surgical device, tissue denaturalization, and so on. Therefore, this research proposes a robust algorithm that simulates noise to resemble real situations and classifies tissue using conventional classifier algorithms. In this research, the bioimpedance spectrum for six tissues (liver, large intestine, kidney, lung, muscle, and fat) is measured, and five classifier algorithms are used. A signal-to-noise ratio of additive white Gaussian noise diversifies the testing sets, and as a result, each classifier's performance exhibits a difference. The k-nearest neighbors algorithm shows the highest classification rate of 92.09% (p < 0.01) and a standard deviation of 1.92%, which confirms high reproducibility.

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References

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