A mechanical actuator for Magnetic Resonance Elastography (MRE) and a method for inducing shear waves for MRE as well as respective system and method for MRE using the principle of centrifugal force for wave induction is disclosed. The mechanical actuator comprises a passive driver including a rotational turbine vibrator having an eccentric weight, the turbine vibrator being powered by a fluid (e.g. compresses air or water), and an active driver configured to control the pressure of the fluid powering the turbine vibrator.
