An ultrasound-based imaging method is proposed to visualize viscoelastic properties of the breast masses at sub-Hertz frequencies. The method utilizes an automated compression device with closed-loop feedback control that houses an ultrasound probe. A ramp-and-hold creep test is performed on the tissue while ultrasound is used to image tissue deformation. A classic viscoelastic Kelvin-Voigt model is then used to estimate viscoelasticity parameters….
We proposed an indentation-vibration-based method to simultaneously measure the cellular mechanical properties in situ, including cellular mass, elasticity and viscosity, based on the principle of forced vibration stimulated by simple harmonic force using an atomic force microscope system integrated with a piezoelectric transducer as the substrate vibrator.
Non-invasive measurement of tissue viscoelastic properties is gaining more attention for screening and diagnostic purposes. Recently, measuring dynamic response of tissue under a constant force has been studied for estimation of tissue viscoelastic properties in terms of retardation times.