FMRI compatible haptic interface actuated with traveling wave ultrasonic motor

  • Flueckiger M
  • Bullo M
  • Chapuis D
 et al. 
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Abstract

We are developing haptic interfaces compatible with functional magnetic resonance imaging (fMRI) for neuroscience studies. The presented prototype with one rotary degree of freedom is actuated by a traveling wave ultrasonic motor operating under admittance control. Torque is sensed from the deflection of an elastic polymer probe via light intensity measurement over optical fibers. This concept allows us to place all electronic components outside the shielded MR room. Hence, the device can be used in conjunction with fMRI, providing torque and motion feedback simultaneously with imaging. Its compactness and simplicity facilitate the construction of multiple degree of freedom systems. View full abstract

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Authors

  • Roger GassertSwiss Federal Institute of Technology Zurich Department of Health Sciences and Technology

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  • Markus Flueckiger

  • Matteo Bullo

  • Dominique Chapuis

  • Yves Perriard

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