Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Temperature Rise due to Nonlinear Propagation of Ultrasound using Weak Shock Theory

Weak Shock Theory를 이용한 초음파의 비선형 전파에 의한 온도 상승

  • Choi, M.J. (Department of Biomedical Engineering, College of Medicine, Cheju National University) ;
  • Sung, K.M. (Institute of New Media & Communication, Seoul National University) ;
  • Lee, S.E. (Department of Urology, College of Medicine, Seoul National University) ;
  • Chung, B.H. (Department of Urology, College of Medicine, Yonsei University) ;
  • Lee, M.S. (Department of Urology, College of Medicine, Yonsei University)
  • 최민주 (제주대학교 의과대학 의공학교실) ;
  • 성굉모 (서울대학교 뉴미디어통신공동연구소) ;
  • 이상은 (서울대학교 의과대학 비뇨기과학교실) ;
  • 정병하 (연세대학교 의과대학 비뇨기과학교실) ;
  • 이무상 (연세대학교 의과대학 비뇨기과학교실)
  • Published : 1998.11.20
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Abstract

The present study employs weak shock theory and bio-heat transfer function to predict the temperature rise due to nonlinear propagation of high amplitude ultrasound. The theory shows that, for the focused ultrasound which is assumed to have an gaussian beam profile and has the focal intensity of $1000W/cm^2$, the temperature rise of liver tissue exposed for 1 second to the energy lost during nonlinear propagation goes up to about $30^{\circ}C$. This indicate that it is necessary to consider the nonlinear propagation induced heating enhancement when setting exposure condition of high intensity focused ultrasound used for cancer thermotherapy.

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