Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical and Experimental Study on Mechanical Properties of Gelatin as Substitute for Brain Tissue

뇌 조직의 기계적 물성에 관한 젤라틴을 이용한 수치해석 및 실험적 연구

  • Bahn, Yong (Dept. of Mechanical Engineering, Dankook Univ.) ;
  • Choi, Deok-Kee (Dept. of Mechanical Engineering, Dankook Univ.)
  • 반용 (단국대학교 기계공학과) ;
  • 최덕기 (단국대학교 기계공학과)
  • Received : 2014.07.09
  • Accepted : 2014.11.06
  • Published : 2015.02.01
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Abstract

The mechanical properties of living tissues have been major subjects of interest in biomechanics. In particular, the characteristics of very soft materials such as the brain have not been fully understood because experiments are often severely limited by ethical guidelines. There are increasing demands for studies on remote medical operations using robots. We conducted compression tests on brain-like specimens made of gelatin to find substitutes with the mechanical properties of brain tissues. Using a finite element analysis, we compared our experimental data with existing data on the brain in order to establish material models for brain tissues. We found that our substitute models for brain tissues effectively simulated their mechanical behaviors.

생체 조직에 대한 물리적 특성은 생체공학의 주된 관심사다. 특히 뇌 조직과 같은 매우 무른 생체 조직의 특성은 아직까지 정확히 밝혀지지 않고 있는 실정이다. 이는 윤리적, 사회적인 문제로 실험이 매우 제한적이고 어렵기 때문이다. 하지만 의료 응용분야에서의 로봇 수술이 발달함에 따라 이런 매우 무른 조직에 대한 정확한 특성이 요구되어지고 있는 실정이다. 이에 본 논문에서는 뇌 조직과 유사한 거동을 보이는 젤라틴으로 시편을 제작하여 기존연구와 비교하고 유사한 거동을 보이는 시편 제작조건을 찾아내고 이 조건으로 만들어진 시편을 이용하여 반복적인 실험을 실시하였다. 이렇게 얻어진 실험 데이터를 이용하여 초탄성 모델에 적용시켜 재료 상수들을 찾고 이를 FE 해석에 적용시켜 실험데이터와 비교하여 일치함을 보였다.

Keywords

References

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