Triaxial Fiber Optic Magnetic Field Sensor for Magnetic Resonance Imaging
| Autor: | Angelo Catalano, Massimo L. Filograno, Ernesto Forte, Ciro Visone, Carlo Cavaliere, Andrea Cusano, Andrea Soricelli, Antonello Cutolo, Marco Aiello, Marco Pisco, Daniele Davino |
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| Přispěvatelé: | Filograno, M, Pisco, M, Catalano, A, Forte, E, Aiello, M, Cavaliere, C, Soricelli, A, Davino, D, Visone, C, Cutolo, A, Cusano, A |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Optical fiber
Materials science Magnetometer business.industry Magnetism Physics::Optics Magnetostriction 02 engineering and technology 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics law.invention Magnetic field 020210 optoelectronics & photonics Terfenol-D Optics Fiber Bragg grating Fiber optic sensor law 0202 electrical engineering electronic engineering information engineering 0210 nano-technology business |
| Popis: | We present a fiber optic magnetic field sensor conceived for magnetic resonance imaging (MRI) applications. The sensor is based on the integration of fiber optic strain sensors (fiber Bragg gratings—FBGs) with a sensing material (Terfenol-D). The response of an FBG integrated with a block of Terfenol-D was preliminarily investigated by taking into account the dependence of the Terfenol-D magnetostrictive response on both the longitudinal and transversal magnetic fields, with different preloads. Based on the performed characterizations, a triaxial magnetic field sensor was designed, characterized, and fabricated. An algorithm enabling the demodulation of the magnetic field from the readout of the three FBGs was also implemented, by taking into account the interdependence among the different sensor responses. Experimental results demonstrate the ability of the triaxial sensor to measure the magnetic field. Performance assessment and critical analysis are reported as well, elucidating both the abilities and limitations of the implemented sensing configuration. Finally, as proof of principle, a sensing system constituted of 20 triaxial sensors has been fabricated and used to map the magnetic field strength distribution in an MRI diagnostic centre. |
| Databáze: | OpenAIRE |
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