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Safety evaluation of magnetic catheter steering with upgraded magnetic resonance imaging system

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4 Author(s)
G. Bringout ; NanoRobotics Laboratory, Computer Engineering Department, Ecole Polytechnique Montreal (EPM), Quebec, Canada, H3C 3A7 ; V. Lalande ; F. P. Gosselin ; S. Martel

Catheter navigation and placement through the arterial network is a major limitation for clinical procedure. In this article, a specific catheter tip and a modified clinical MRI scanner with an upgraded gradient system are used to steer a catheter through a single Y-shaped bifurcation. Safety aspects are analyzed to avoid the peripheral nerve stimulation (PNS) according to an empirical law of magnetostimulation and the magnetic field of upgraded 3D gradient coils. For a rabbit-sized device, the rising time of gradients system have to be limited to 1.7ms at 400mT.m-1 to avoid PNS. These rise time values allow the use of this system for catheter steering and other more demanding applications.

Published in:

2010 Annual International Conference of the IEEE Engineering in Medicine and Biology

Date of Conference:

Aug. 31 2010-Sept. 4 2010