We present a shear wave elastography (SWE) approach for thyroid characterization that is inspired by passive elastography, which extracts elasticity from the natural vibrations in living tissues that are caused by cardiac motion, blood pulsatility, and muscle activity. On thyroid, this physiological noise is mainly due to the carotid pulsation, which is in the 1–10 Hz bandwidth and is located right next to the gland. In order to decrease the shear wavelength and increase the signal to noise ratio, we propose to create in the thyroid a complex shear wave field by using natural vocal tract vibrations. The nature of the sound can be easily modified to be narrow or broad band, with small or large amplitude. Using correlation-based algorithm and a sound sustained at 150 Hz, we have developed an innovative technique using ultrasound, allowing us to compute a 2D shear wave velocity map, superposed onto a B-mode ultrasound image of a volunteer's thyroid. Using our vocal passive elastography method, shear wave velocity was measured at every point within a mask surrounding the thyroid with a pixel resolution of 150 × 150 μm2. The mean shear wave speed value measured is 3.2 m/s, taking its value from 0.7 m/s to 8.8 m/s. The values obtained were in good agreement with comparative shear wave elastography (SWE) measurements.
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11 January 2021
Research Article|
January 12 2021
Natural shear wave imaging using vocal tract vibrations: Introducing vocal passive elastography (V-PE) to thyroid elasticity mapping
Steve Beuve
;
Steve Beuve
a)
1
UMR 1253, iBrain, Université de Tours, Inserm
, 37000 Tours, France
a)Author to whom correspondence should be addressed: steve.beuve@etu.univ-tours.fr
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Samuel Callé
;
Samuel Callé
2
GREMAN UMR 7347, Université de Tours, CNRS, INSA Centre Val de Loire
, 37200 Tours, France
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Elise Khoury;
Elise Khoury
1
UMR 1253, iBrain, Université de Tours, Inserm
, 37000 Tours, France
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Emmanuel Gilles Simon;
Emmanuel Gilles Simon
3
Department of Obstetrics, Gynecology and Fetal Medicine, CHU Dijon Bourgogne
, 21000 Dijon, France
4
UBFC, Université Bourgogne Franche-Comté
, 25000 Besançon, France
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Jean-Pierre Remenieras
Jean-Pierre Remenieras
1
UMR 1253, iBrain, Université de Tours, Inserm
, 37000 Tours, France
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a)Author to whom correspondence should be addressed: steve.beuve@etu.univ-tours.fr
Appl. Phys. Lett. 118, 023702 (2021)
Article history
Received:
October 01 2020
Accepted:
November 18 2020
Citation
Steve Beuve, Samuel Callé, Elise Khoury, Emmanuel Gilles Simon, Jean-Pierre Remenieras; Natural shear wave imaging using vocal tract vibrations: Introducing vocal passive elastography (V-PE) to thyroid elasticity mapping. Appl. Phys. Lett. 11 January 2021; 118 (2): 023702. https://doi.org/10.1063/5.0031169
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