Patent ID: 8706192
Filing Date: 2014-04-22
Classification: A61B,F15B,G01R

Abstract:
1. A hydraulic driver of a magnetic resonance elastography (MRE) system, wherein the hydraulic driver is adapted to be connected to at least a passive actuator for contacting with a subject, the hydraulic driver comprising: a pump; a hydraulic piston-cylinder unit operatively coupled to the pump; and a tube assembly comprising a proximal end in liquid communication with the hydraulic piston-cylinder unit and a distal end in liquid communication with the passive actuator; wherein the passive actuator oscillates in response to hydraulic energy generated in a liquid in the hydraulic driver as the pump drives the piston forward and backward in the cylinder of the hydraulic piston-cylinder unit; and wherein the tube assembly comprises a reservoir having at one end thereof an opening for liquid communication with a first tube extending from the piston-cylinder unit, and at an opposite end thereof an opening for liquid communication with a second tube leading to the passive actuator; a diameter of the first tube is larger than a diameter of the second tube; and a valve is provided on the reservoir.