Abnormal biomechanical properties of the myocardium, such as increased passive stiffness, prevent the heart of patients with diastolic heart failure to completely relax during diastole. Therefore, non-invasively measuring the stiffness is of importance. In this study, we used shear wave propagation velocities as a measure of stiffness of a thin plate phantom. We tested the applicability of a spatio-temporal correlation technique to determine these velocities of diffuse fields in a thin plate. The obtained velocities were similar to the results found with direct shear wave measurements. We also show that velocities are overestimated in non-completely diffuse wave fields with out-of-plane propagation.

Acoustic radiation force, Diffuse fields, Diffuse wave correlation technique, Shear wave elastography
dx.doi.org/10.1109/ULTSYM.2017.8091589, hdl.handle.net/1765/103755
2017 IEEE International Ultrasonics Symposium, IUS 2017
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Erasmus MC: University Medical Center Rotterdam

Keijzer, L. (L.), Sabbadini, A. (A.), Bosch, J.G, Verweij, M.D, van der Steen, A.F.W, de Jong, N, & Vos, H.J. (2017). Diffuse shear wave elastography in a thin plate phantom. In IEEE International Ultrasonics Symposium, IUS. doi:10.1109/ULTSYM.2017.8091589