RT Journal Article
T1 Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization
A1 Callejas, Antonio
A1 Gomez, Antonio
A1 Melchor, Juan
A1 Riveiro, Miguel
A1 Masso, Paloma
A1 Torres, Jorge
A1 Lopez-Lopez, Modesto T.
A1 Rus, Guillermo
K1 torsional wave sensor
K1 tissue mimicking phantom
K1 cervical tissue
K1 rheological model
K1 rheometry experiment
K1 sensitivity study
K1 complex shear modulus
K1 Viscoelastic properties
K1 Radiation force
K1 Elastography
K1 Ultrasound
K1 Elasticity
K1 Dispersion
K1 Viscosity
K1 Rheometry
K1 Modulus
K1 Mucosa
AB 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.
PB MDPI AG
SN 1424-8220
YR 2017
FD 2017-09-08
LK http://hdl.handle.net/10668/19323
UL http://hdl.handle.net/10668/19323
LA en
NO Callejas A, Gomez A, Melchor J, Riveiro M, Massó P, Torres J, et al. Performance Study of a Torsional Wave Sensor and Cervical Tissue Characterization. Sensors (Basel). 2017 Sep 11;17(9):2078.
NO This research was supported by the Ministry of Education DPI2014-51870-R, DPI2010-17065 and UNGR15-CE-3664, Ministry of Health DTS15/00093 and PI16/00339, and Junta de Andalucía P11-CTS-8089 projects. Modesto T. López-López acknowledges financial support by the project FIS2013-41821-R (Ministry of Economy and Competitiveness, co-funded by the ERDF, European Union). We acknowledge the collaboration of the members of the Anatomical Pathology Unit of the University Hospital Complex of Granada. Finally, Antonio Callejas is grateful to the University of Granada for the award of an PhD fellowship.
DS RISalud
RD Apr 4, 2025