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Shape design optimization for an untethered microdevice meant to navigate in the human bloodstream is studied based on previous variational finite element (FE) work done. The suggested shape for a first generation prototype is a prolate spheroid design, which enables to minimize the drag force and to maximize the use of the MRI's magnetic gradients
The electromagnetic properties of a new volume resonator coil for MR neuroimaging are studied. This coil design is based on a resonator coil called PERES coil. A commercial software tool based on the finite-element method is used to compute the electric and magnetic fields for the quasi-static regime for a specific layout of two coils with 4 rectangular-shaped coils each. Computational experiments...
A new method for the propulsion of a spherical ferromagnetic device along a given path in a water filled phantom with no human interaction is presented using an 1.5 T magnetic resonance imaging (MRI) clinical system. A special real time loop is implemented and presented that feeds the scanner with the appropriate gradients amplitudes and directions based on a pre-determined path. This paper studies...
A new unilateral permanent magnet configuration for magnetic resonance imaging (MRI) system producing a slice imaging region with field homogeneity is presented. It is a totally new problem about magnet design to build a slice imaging region with homogeneous magnetic field outside the magnet source. A novel design method with high precision is proposed here to probe the existence possibility of such...
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