Title :
Precision Analysis of Viscoelastic Measurement Using Shear Wave Dispersion Vibrometry Method
Author :
Lin, Haoming ; Chen, Siping
Author_Institution :
Sch. of Biomed. Eng. & Instrum. Sci., Zhejiang Univ., Hangzhou, China
Abstract :
Shear wave dispersion ultrasound vibrometry is a noninvasive method that can quantitatively measure tissue viscoelastic properties. But the accuracy of measurement will be influenced by several factors. In this study, we used FEM model to simulate the frequency response of tissue excited by harmonic radiation force. Then the resulting shear wave displacement was recorded for pulse-echo simulation process. The effects of detecting positions, displacement amplitude, signal-to-noise ratio were analyzed. The results show that the precision of viscoelasticity estimation will be degraded by low displacement amplitude, SNR ratio and far detecting position. Furthermore, estimation accuracy will also be degraded by boundary refection. The results will be useful for optimizing the system so as to provide better estimation precision.
Keywords :
biological tissues; biomechanics; biomedical ultrasonics; elastic waves; finite element analysis; vibration measurement; viscoelasticity; FEM model; boundary reflection; displacement amplitude; finite element method; harmonic radiation force; noninvasive method; position detection; pulse-echo simulation process; shear wave dispersion vibrometry method; shear wave displacement; signal-to-noise ratio; tissue viscoelastic property; ultrasound vibrometry; viscoelastic measurement; Elasticity; Estimation; Signal to noise ratio; Ultrasonic imaging; Ultrasonic variables measurement; Vibrations; Viscosity; finite element simulation; shear wave dispersion vibrometry; viscoelasticity estimation precision;
Conference_Titel :
Intelligent Computation and Bio-Medical Instrumentation (ICBMI), 2011 International Conference on
Conference_Location :
Wuhan, Hubei
Print_ISBN :
978-1-4577-1152-7
DOI :
10.1109/ICBMI.2011.73
