Magnetic force induced vibration on a ferromagnetic sphere for viscoelastic media characterization
| Autor: | Alejandro Cebrecos, Miguel Company, Noé Jiménez, José María Benlloch, Francisco Camarena |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia Fundación Universitaria San Pablo CEU (FUSPCEU) |
| Popis: | [EN] A new method that combines transient magnetic forces with ultrasonic imaging and allows the local experimental characterization of the complex shear modulus of a viscoelastic medium is presented. By measuring the dynamics of a ferromagnetic inclusion under the application of a magnetic force, the viscoelastic properties of the medium are extracted. The system is composed of a coil, which creates a magnetic field that induces displacement on a ferromagnetic particle located inside a test phantom, and an ultrasound transducer operating in pulsed-echo mode, utilized to track the displacement of the particle with spatial resolution of several um. Experiments were conducted embedding a ferromagnetic sphere on test phantoms with different compositions and at different temperatures. The obtained results are in good agreement with the theoretical estimation of the dynamical response of a sphere and show robustness on the estimation of the viscoelastic parameters. Moreover, temperature dependent results show asymptotic elasticity values which are physically consistent for soft-solid media. This work is funded by the Spanish Ministerio de Economía e lnnovación (MlNECO) Generalitat Valenciana (GVA) through the projects TEC2016-80976-R and AlCO2016-108. N.J. and A. C acknowledge the support of GVA through the contracts APOSTD/2017/042 and APOSTD/2018/A/229. |
| Databáze: | OpenAIRE |
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