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

doi:10.1088/1674-1056/25/4/044301

Abstract

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.

Keywords: spheroidal beam equation rib parameters heat deposition temperature field

Received: 12 June 2015
Revised: 19 November 2015
Accepted manuscript online:

PACS:	43.25.+y	(Nonlinear acoustics)
	43.80.+p	(Bioacoustics)
	87.50.Y-	(Biological effects of acoustic and ultrasonic energy)

Fund:

Project 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), and the Priority Academic Program Development of Jiangsu Higher Education Institutions and SRF for ROCS, SEM.

Corresponding Authors: Xiaozhou Liu
E-mail: xzliu@nju.edu.cn

Cite this article:

Xin Wang(王鑫), Jiexing Lin(林杰兴), Xiaozhou Liu(刘晓宙), Jiehui Liu(刘杰惠), Xiufen Gong(龚秀芬) Study of the temperature rise induced by a focusing transducer with a wide aperture angle on biological tissue containing ribs 2016 Chin. Phys. B 25 044301

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

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