A system is configured to produce a stress on a subject while performing a
magnetic resonance elastography scan in a magnetic resonance imaging
(MRI) system. The system includes an active driver operable to produce an
energy configured for a magnetic resonance elastography (MRE) process. A
passive actuator is configured to be positioned in the MRI system and to
be coupled to the subject. The system includes a tube coupling the active
driver to the passive actuator to deliver the energy produced by the
active driver to the passive actuator, and a strap coupled to the passive
actuator. The strap is configured to be disposed around the subject. The
strap includes a substantially inelastic material configured to convert
the energy delivered to the passive actuator from the tube into shear
waves with the subject for use in the MRE process.