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Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization

A novel torsional wave sensor designed to characterize mechanical properties of soft tissues is presented in this work. Elastography is a widely used technique since the 1990s to map tissue stiffness. Moreover, quantitative elastography uses the velocity of shear waves to achieve the shear stiffness...

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Autores principales: Callejas, Antonio, Gomez, Antonio, Melchor, Juan, Riveiro, Miguel, Massó, Paloma, Torres, Jorge, López-López, Modesto T., Rus, Guillermo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5621116/
https://www.ncbi.nlm.nih.gov/pubmed/28891995
http://dx.doi.org/10.3390/s17092078
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author Callejas, Antonio
Gomez, Antonio
Melchor, Juan
Riveiro, Miguel
Massó, Paloma
Torres, Jorge
López-López, Modesto T.
Rus, Guillermo
author_facet Callejas, Antonio
Gomez, Antonio
Melchor, Juan
Riveiro, Miguel
Massó, Paloma
Torres, Jorge
López-López, Modesto T.
Rus, Guillermo
author_sort Callejas, Antonio
collection PubMed
description A novel torsional wave sensor designed to characterize mechanical properties of soft tissues is presented in this work. Elastography is a widely used technique since the 1990s to map tissue stiffness. Moreover, quantitative elastography uses the velocity of shear waves to achieve the shear stiffness. This technique exhibits significant limitations caused by the difficulty of the separation between longitudinal and shear waves and the pressure applied while measuring. To overcome these drawbacks, the proposed torsional wave sensor can isolate a pure shear wave, avoiding the possibility of multiple wave interference. It comprises a rotational actuator disk and a piezoceramic receiver ring circumferentially aligned. Both allow the transmission of shear waves that interact with the tissue before being received. Experimental tests are performed using tissue mimicking phantoms and cervical tissues. One contribution is a sensor sensitivity study that has been conducted to evaluate the robustness of the new proposed torsional wave elastography (TWE) technique. The variables object of the study are both the applied pressure and the angle of incidence sensor–phantom. The other contribution consists of a cervical tissue characterization. To this end, three rheological models have fit the experimental data and a static independent testing method has been performed. The proposed methodology permits the reconstruction of the mechanical constants from the propagated shear wave, providing a proof of principle and warranting further studies to confirm the validity of the results.
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spelling pubmed-56211162017-10-03 Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization Callejas, Antonio Gomez, Antonio Melchor, Juan Riveiro, Miguel Massó, Paloma Torres, Jorge López-López, Modesto T. Rus, Guillermo Sensors (Basel) Article A novel torsional wave sensor designed to characterize mechanical properties of soft tissues is presented in this work. Elastography is a widely used technique since the 1990s to map tissue stiffness. Moreover, quantitative elastography uses the velocity of shear waves to achieve the shear stiffness. This technique exhibits significant limitations caused by the difficulty of the separation between longitudinal and shear waves and the pressure applied while measuring. To overcome these drawbacks, the proposed torsional wave sensor can isolate a pure shear wave, avoiding the possibility of multiple wave interference. It comprises a rotational actuator disk and a piezoceramic receiver ring circumferentially aligned. Both allow the transmission of shear waves that interact with the tissue before being received. Experimental tests are performed using tissue mimicking phantoms and cervical tissues. One contribution is a sensor sensitivity study that has been conducted to evaluate the robustness of the new proposed torsional wave elastography (TWE) technique. The variables object of the study are both the applied pressure and the angle of incidence sensor–phantom. The other contribution consists of a cervical tissue characterization. To this end, three rheological models have fit the experimental data and a static independent testing method has been performed. The proposed methodology permits the reconstruction of the mechanical constants from the propagated shear wave, providing a proof of principle and warranting further studies to confirm the validity of the results. MDPI 2017-09-11 /pmc/articles/PMC5621116/ /pubmed/28891995 http://dx.doi.org/10.3390/s17092078 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Callejas, Antonio
Gomez, Antonio
Melchor, Juan
Riveiro, Miguel
Massó, Paloma
Torres, Jorge
López-López, Modesto T.
Rus, Guillermo
Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization
title Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization
title_full Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization
title_fullStr Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization
title_full_unstemmed Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization
title_short Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization
title_sort performance study of a torsional wave sensor and cervical tissue characterization
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5621116/
https://www.ncbi.nlm.nih.gov/pubmed/28891995
http://dx.doi.org/10.3390/s17092078
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