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Abstract #1380

Two novel low-cost 3D-printed mechanical actuators for MR elastography using exact end-to-end motion and centripetal force

Wiebke Neumann1, Lothar R. Schad1, and Frank G. Zöllner1

1Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany

For reliable quantification of the shear modulus of soft tissues, MR elastography (MRE) needs consistent methods of low-frequency wave induction to the region of interest in the human body. This work proposes two novel designs of 3D-printed mechanical actuators powered by compressed air. Driver A offers constant and specific actuation amplitude independent of the chosen frequency of wave induction. Driver B employs centripetal force for wave induction. Contrary to conventionally used air cushions, the amplitude increases at higher frequencies, thus, making it suitable for high frequency MRE and multi-source wave induction.

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