fMRI-Compatible Electromagnetic Haptic Interface.
Identifieur interne : 006453 ( Main/Merge ); précédent : 006452; suivant : 006454fMRI-Compatible Electromagnetic Haptic Interface.
Auteurs : R. Riener [Suisse] ; T. Villgrattner ; R. Kleiser ; T. Nef ; S. KolliasSource :
- Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference [ 1557-170X ] ; 2005.
Abstract
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.
DOI: 10.1109/IEMBS.2005.1616123
PubMed: 17281892
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