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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| Format: | Article |
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MDPI AG
2017-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/17/9/2078 |
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| author | Antonio Callejas Antonio Gomez Juan Melchor Miguel Riveiro Paloma Massó Jorge Torres Modesto T. López-López Guillermo Rus |
| author_facet | Antonio Callejas Antonio Gomez Juan Melchor Miguel Riveiro Paloma Massó Jorge Torres Modesto T. López-López Guillermo Rus |
| author_sort | Antonio Callejas |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-11T12:08:50Z |
| format | Article |
| id | doaj.art-bf3d52b61b2f4fcc9cb860897487b11a |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T12:08:50Z |
| publishDate | 2017-09-01 |
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| series | Sensors |
| spelling | doaj.art-bf3d52b61b2f4fcc9cb860897487b11a2022-12-22T04:24:39ZengMDPI AGSensors1424-82202017-09-01179207810.3390/s17092078s17092078Performance Study of a Torsional Wave Sensor and Cervical Tissue CharacterizationAntonio Callejas0Antonio Gomez1Juan Melchor2Miguel Riveiro3Paloma Massó4Jorge Torres5Modesto T. López-López6Guillermo Rus7Department of Structural Mechanics, University of Granada, 18071 Granada , SpainDepartment of Mechanical Engineering, University College London, WC1E 7JE London, UKDepartment of Structural Mechanics, University of Granada, 18071 Granada , SpainDepartment of Structural Mechanics, University of Granada, 18071 Granada , SpainDepartment of Structural Mechanics, University of Granada, 18071 Granada , SpainDepartment of Structural Mechanics, University of Granada, 18071 Granada , SpainDepartment of Applied Physics, University of Granada, 18071 Granada, SpainDepartment of Structural Mechanics, University of Granada, 18071 Granada , SpainA 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.https://www.mdpi.com/1424-8220/17/9/2078torsional wave sensortissue mimicking phantomcervical tissuerheological modelrheometry experimentsensitivity studycomplex shear modulus |
| spellingShingle | Antonio Callejas Antonio Gomez Juan Melchor Miguel Riveiro Paloma Massó Jorge Torres Modesto T. López-López Guillermo Rus Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization Sensors torsional wave sensor tissue mimicking phantom cervical tissue rheological model rheometry experiment sensitivity study complex shear modulus |
| 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 | torsional wave sensor tissue mimicking phantom cervical tissue rheological model rheometry experiment sensitivity study complex shear modulus |
| url | https://www.mdpi.com/1424-8220/17/9/2078 |
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