Study of the temperature rise induced by a focusing transducer with a wide aperture angle on biological tissue containing ribs  

作　　者：王鑫 林杰兴 刘晓宙 刘杰惠 龚秀芬 

机构地区：[1]Key Laboratory of Modern Acoustics, Institute of Acoustics and School of Physics,Collaborative Innovation Center of Advanced Microstructures, Nanjing University [2]State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2016年第4期186-193,共8页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant Nos.2012CB921504 and 2011CB707902);the National Natural Science Foundation of China(Grant No.11274166);the Fundamental Research Funds for the Central Universities,China(Grant No.020414380001);the Fund from State Key Laboratory of Acoustics;Chinese Academy of Sciences(Grant No.SKLA201401);China Postdoctoral Science Foundation(Grant No.2013M531313);the Priority Academic Program Development of Jiangsu Higher Education Institutions and SRF for ROCS,SEM

摘　　要：We used the spheroidal beam equation to calculate the sound field created by focusing a transducer with a wide aperture angle to obtain the heat deposition, and then we used the Pennes bioheat equation to calculate the temperature field in biological tissue with ribs and to ascertain the effects of rib parameters on the temperature field. The results show that the location and the gap width between the ribs have a great influence on the axial and radial temperature rise of multilayer biological tissue. With a decreasing gap width, the location of the maximum temperature rise moves forward; as the ribs are closer to the transducer surface, the sound energy that passes through the gap between the ribs at the focus decreases, the maximum temperature rise decreases, and the location of the maximum temperature rise moves forward with the ribs.We used the spheroidal beam equation to calculate the sound field created by focusing a transducer with a wide aperture angle to obtain the heat deposition, and then we used the Pennes bioheat equation to calculate the temperature field in biological tissue with ribs and to ascertain the effects of rib parameters on the temperature field. The results show that the location and the gap width between the ribs have a great influence on the axial and radial temperature rise of multilayer biological tissue. With a decreasing gap width, the location of the maximum temperature rise moves forward; as the ribs are closer to the transducer surface, the sound energy that passes through the gap between the ribs at the focus decreases, the maximum temperature rise decreases, and the location of the maximum temperature rise moves forward with the ribs.

关 键 词：spheroidal beam equation rib parameters heat deposition temperature field 

分 类 号：TB552[理学—物理]