Project supported by the National Natural Science Foundation of China (Grant Nos 10274032 and 320200265), National Natural Science Foundation of Jiangsu Province, China (Grant No BK2004081).
The viscoelasticity and subharmonic generation of a kind of lipid ultrasound contrast agent are investigated. Based on the measurement of the sound attenuation spectrum, the viscoelasticity of the lipid shell is estim...