title: Safety evaluation of magnetic catheter steering with upgraded magnetic resonance imaging system.
abstract: 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.
authors.affiliation: NanoRobotics Laboratory, Computer Engineering Department, Ecole Polytechnique Montreal (EPM), Quebec, Canada, H3C 3A7.
authors.forename: G
authors.initials: G
authors.lastname: Bringout
authors.forename: V
authors.initials: V
authors.lastname: Lalande
authors.forename: F P
authors.initials: FP
authors.lastname: Gosselin
authors.forename: S
authors.initials: S
authors.lastname: Martel
mesh_terms: D000818:Animals; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008962:Models, Theoretical; D011817:Rabbits