title: Locomotive micro-implant with active electromagnetic propulsion.
abstract: An active locomotive technique requiring only an external power source and a static magnetic field is presented, and its operation is analyzed and simulated. For a modest static MRI magnetic field of 1 T, the results show that a 1-mm cube achieves roughly 3 cm/sec of lateral motion using less than 20.4 microW of power. Current-carrying wires generate the forces, resulting in highly controllable motion. Existing solutions trade off size and power: passive solutions are small but impractical, and mechanical solutions are inefficient and large. The presented solution captures the advantages of both systems, and has much better scalability.
authors: Electrical Engineering, Stanford University, USA. pivonka@stanford.edu
authors: Daniel
authors: D
authors: Pivonka
authors: Ada S Y
authors: AS
authors: Poon
authors: Teresa H
authors: TH
authors: Meng
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004574:Electromagnetic Fields; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008280:Magnetics / Q000295:instrumentation*; D008846:Micromanipulation / Q000295:instrumentation*; D008904:Miniaturization; D008962:Models, Theoretical; D009038:Motion; D019736:Prostheses and Implants; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers