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3D elastic tensor imaging in weakly transversely isotropic soft tissues

M. Correia, T. Deffieux, S. Chatelin, Jean Provost, M. Tanter and M. Pernot

Article (2018)

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Abstract

We present herein 3D elastic tensor imaging (3D ETI), an ultrasound-based volumetric imaging technique to provide quantitative volumetric mapping of tissue elastic properties in weakly elastic anistropic media. The technique relies on (1) 4D ultrafast shear wave elastography (SWE) at very high volume rate (e.g. > 8000 Hz, depending only on the imaging depth), (2) a volumetric estimation of shear wave velocity using the eikonal equation and (3) a generalized 3D elastic tensor-based approach. 3D ETI was first evaluated using numerical simulations in homogeneous isotropic and transverse isotropic media. Results showed that 3D ETI can accurately assess tissue stiffness and tissue anisotropy in weakly transversely isotropic media (elastic fractional anisotropy coefficient < 0.34). Experimental feasibility was shown in vitro in a transverse isotropic phantom. Quantification of the elastic properties by 3D ETI was in good agreement with 2D SWE results performed at different orientations using a clinical ultrafast ultrasound scanner. 3D ETI has the potential to provide a volumetric quantitative map of tissue elastic properties in weakly transversely isotropic soft tissues within less than 20 ms of acquisition for the entire imaged volume.

Uncontrolled Keywords

Anisotropy; Elasticity Imaging Techniques, methods; Humans; Imaging, Three-Dimensional, methods; Phantoms, Imaging; Soft Tissue Neoplasms, diagnostic imaging; Ultrasonography, methods

Subjects: 3100 Physics > 3100 Physics
3100 Physics > 3101 Atomic and molecular studies
Department: Department of Engineering Physics
Funders: European Research Council (FP/2007–2013)
Grant number: 311025, ANR-10-IDEX-0001-02 PSL
PolyPublie URL: https://publications.polymtl.ca/4829/
Journal Title: Physics in Medicine & Biology (vol. 63, no. 15)
Publisher: IOP Publishing
DOI: 10.1088/1361-6560/aacfaf
Official URL: https://doi.org/10.1088/1361-6560/aacfaf
Date Deposited: 19 Mar 2021 12:21
Last Modified: 12 Apr 2024 01:36
Cite in APA 7: Correia, M., Deffieux, T., Chatelin, S., Provost, J., Tanter, M., & Pernot, M. (2018). 3D elastic tensor imaging in weakly transversely isotropic soft tissues. Physics in Medicine & Biology, 63(15). https://doi.org/10.1088/1361-6560/aacfaf

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