Guided wave elastography of pressurized artery in both longitudinal and transverse sections: Validation in phantom experiments

摘要

Guided wave elastography (GWE) is promising to measure the local arterial stiffness. However, most studies focus on the longitudinal section, with a guided axial wave (GAW). In addition, the dispersion curve of GAW can be well approximated by immersed Lame wave model only at high frequencies (Li et al, UMB 2017). In the transverse section, guided circumferential wave (GCW) can be utilized to obtain the arterial Young's modulus (Li et al, JBM 2017). In this study, the effect of the lumen pressure on the dispersion curves of GAW and GCW was investigated, and a pressure quantification method from GCW at different pressures was developed.