高声衰减生物媒质非线性声参量的研究

STUDY ON THE NONLINEAR ACOUSTIC PARAMETERS IN HIGH ATTENUATION OF BIOLOGICAL MEDIA

摘要: 本文应用相对测量法,并加入衰减与衍射修正,测量与研究了高声衰减生物媒质的非线性声参量B/A。结果表明:心、肝、脾、肾、肌肉组织的B/A值为7左右;尿液、胆汁等水样液体的为6左右;脂肪组织的在9.6以上。分析了脂肪组织非线性声参量较大的原因,认为是由于其组织成份中类脂化合物较多所致。另外,结合本研究,讨论了Ichida等人对脂肪组织非线性声参量的研究结果。

Abstract: Nonlinear acoustic parameter B/A of biological media such as heart,liver,spleen,kidney,muscle,fat,bile and urine had been measured.The nonlinear parameters of heart,liver,spleen,kidney and muscle are about 7,of bile and urine about 6,and that of fat is above 9.6.The large value of nonlinear parameter of fat is attributed to its high liqid content.Results of Ichida et al on fat are discussed.