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fMRI-compatible electromagnetic haptic interface


R. Riener, T. Villgrattner, R. Kleiser, T. Nef, S. Kollias

IEEE Engineering in Medicine and Biology Society, Shanghai, pp. 1106-1109

A new haptic interface device is suggested, which can be used for functional magnetic resonance imaging (fMRI) studies. The basic component of this 1 DOF haptic device are two coils that produce a Lorentz force induced by the large static magnetic field of the MR scanner. A MR-compatible optical angular encoder and a optical force sensor enable the implementation of different control architectures for haptic interactions. The challenge was to provide a large torque, and not to affect image quality by the currents applied in the device. The haptic device was tested in a 3T MR scanner. With a current of up to 1A and a distance of 1m to the focal point of the MR-scanner it was possible to generate torques of up to 4 Nm. Within these boundaries image quality was not affected.


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% Autogenerated BibTeX entry
@InProceedings { RieEtal:2005:IFA_2311,
    author={R. Riener and T. Villgrattner and R. Kleiser and T. Nef and S. Kollias},
    title={{fMRI-compatible electromagnetic haptic interface}},
    booktitle={IEEE Engineering in Medicine and Biology Society},
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