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Abstract #1950

Motion tracking verification with a 3D printed compliant mechanisms and laser interferometry

Christoph Michael Schildknecht1 and Klaas Paul Prüssmann1
1Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Z├╝rich, Switzerland

Synopsis

Precisely characterizing motion tracking modalities in the MRI bore is quite a challenge. Especially when not only static positions ought to be evaluated, but also dynamic characterization is desired. In this work, we show how a compliant mechanism in the form of a folded-beam suspension can be utilized for accurate dynamic positioning. A piezoelectric actuator drives the system, and position feedback is acquired with a laser interferometer. Testing the system with short-wave motion tracking revealed a sub-micrometre agreement.

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