脂肪组织中异物弹性影响激光超声的数值模拟 - 南京大学学报（自然科学）.PDF

( ) 47 2 Vol. 47, No. 2 JOURNAL OF NANJING U NIVERSITY 2011 3 Mar. 2011 ( NAT URA L SCIENCES) 安荣荣, 骆晓森 , 沈中华, 倪晓武 ( , , 210094) : . , , . . , , , . , , , . , , ; ; . . : , , , : O 4269 Numerical simulation of laser ultrasonics in an adipose tissue affected by the elastic modulus of foreign bodies A n RongRong, L uoX iaoSen, Shen ZhongH ua, N i X iaoWu ( School of Science, Nanjing University of Science and Technology , Nanjing, 210094, China) Abstract: The information about elasticit y of biological t issues is important in diagnosing disease. The physiological or pathological changes occurring in the biological tissues or a foreign body in t he biological tissues are often accompanied by great changes in the elastic parameters. T herefore, the elasticity of the biological tissues can affect the generation and transmission of an ultrasonic signal. Based on the thermoelast ic mechanism of a pulsed laser in adipose t issue w ith foreign bodies, w e presented a physical model for ultrasound generation and transmission. T he transient responses of the pulsed laser interacting with adipose tissue, the corresponding stress : ( , , ( 20103219120040) , ( 2010481087) : 2010- 11- 15 , Email: nlglxs@ 163. com 2 : 165 field and the transmission of the related ultrasoun