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Thermal Dispersion Method for a Medical Ultrasonic Phased Array Transducer
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의료용 초음파 위상배열 트랜스듀서의 열 분산 방안

논문 기본 정보

Type
Academic journal
Author
Lee, Wonseok (경북대학교 기계공학과) Roh, Yongrae (경북대학교 기계공학과)
Journal
The Acoustical Society Of Korea 한국음향학회지 한국음향학회지 제34권 제3호 KCI Accredited Journals
Published
2015.1
Pages
210 - 218 (9page)

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Thermal Dispersion Method for a Medical Ultrasonic Phased Array Transducer
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Research history (5)

2016

Design and fabrication of a 20 MHz high frequency linear array ultrasonic transducer for medical use
Lee ,  Wonseok ,  Roh 한국음향학회지 2016.01 Academic journal

2015

Thermal Dispersion Method for a Medical Ultrasonic Phased Array Transducer
Lee ,  Wonseok ,  Roh 한국음향학회지 2015.01 Academic journal

2014

Design and Fabrication of a Medical Module Type Ultrasonic 2D Array Transducer
이원석 기계공학과 2014.01 Thesis

2013

Design and Fabrication of a 1.75D Ultrasonic Transducer
Lee ,  Wonseok ,  Roh 한국음향학회지 2013.01 Academic journal
Design and Fabrication of a 2D Array Ultrasonic Transducer
Lee ,  Wonseok ,  Woo 한국음향학회지 2013.01 Academic journal
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Abstract· Keywords

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When the driving voltage of an ultrasound transducer is increased to improve the quality of ultrasound images, heat is generated inside the transducer that can cause patient's skin burn and degradation of transducer performance. Hence, in this paper, a method to disperse the heat of the transducer has been studied. The phased array transducer having 3 MHz center frequency and 32 channels was selected for analyses of the thermal dispersion. First, mechanism of the heat generation was investigated in relation to the transducer operation through theoretical analysis, and material damping and sound pressure amplitude were confirmed to be influential on the heat generation. Further, we investigated the effects of the properties of the materials constituting the transducer on the thermal dispersion through finite element analysis. Based on the analysis results, we determined the thermal properties of the constituent materials that could facilitate the thermal dispersion inside the transducer. The determined thermal properties were applied to the finite element model, and the results showed that the maximum temperature at an acoustic lens contacting with a patient was decreased to 51 % of its initial value.
#초음파 트랜스듀서 #열 분산

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References (17)

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W. L. Nyborg / 1981 / Heat generation by ultrasound in a relaxing medium / J. Acoust. Soc. Am 70:310~312 google schola T. L. Szabo / 1994 / Time domain wave equations for lossy media obeying a frequency power law / J. Acoust. Soc. Am 96:491~500 google schola D. J. Powell. / 1998 / Dielectric and mechanical absorption mechanisms for time and frequency domain transducer modeling / in Proc. IEEE Ultrason. Symp. :1019~1027 google schola K. L. Gentry. / 2004 / Finite element analysis of temperature rise from an integrated 3-D intracardiac echo and ultrasound ablation transducer / in Proc. IEEE Ultrason. Symp :122~125 google schola S. Wang. / 2011 / Optimization of pulsed focused ultrasound exposures for hyperthermia applications / J. Acoust. Soc. Am 130:599~609 google schola

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