In-plane anisotropy method for the characterization of the elastic properties of anisotropic materials

Sara Aristizabal; Ivan Z. Nenadic; Bo Qiang; Carolina Amador; James F Greenleaf; Matthew W Urban

doi:10.1109/ULTSYM.2015.0217

In-plane anisotropy method for the characterization of the elastic properties of anisotropic materials

Sara Aristizabal, Ivan Z. Nenadic, Bo Qiang, Carolina Amador, James F Greenleaf, Matthew W Urban

Physiology & Biomedical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

Acoustic radiation force-based methods have the ability of estimating tissue viscoelastic material properties. A limitation of the current methods exists when the estimation of the mechanical properties is performed under the assumption that the tissue is isotropic and homogeneous thus, neglecting the inherent anisotropy nature of certain tissues. Currently to facilitate the estimation of the elastic parameters of these types of tissues, it is common to assume that these anisotropic biological media can be modeled as being transversely isotropic (TI). Based on this assumption mechanical properties of these tissues are evaluated by measuring the shear wave velocity at different angles by rotating the tissue with respect to the transducer, where 0° and 180° are defined along the fibers, and 90° and 270° across the fibers. The characterization of the behavior of anisotropic materials by the abovementioned method presents numerous limitations that can be overcome by a simplified approach to estimate the TI shear moduli by measuring the shear waves in a single B-mode imaging plane. We refer to this method as In-Plane Anisotropy (IPA) technique. To investigate the feasibility of the IPA method, we used a finite element model (FEM) of the shear wave propagation in an elastic TI media, and we evaluated the anisotropic characteristics of a phantom incorporating fibrous material with preferential orientations and a sample of pork tenderloin.

Original language	English (US)
Title of host publication	2015 IEEE International Ultrasonics Symposium, IUS 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)	9781479981823
DOIs	https://doi.org/10.1109/ULTSYM.2015.0217
State	Published - Nov 13 2015
Event	IEEE International Ultrasonics Symposium, IUS 2015 - Taipei, Taiwan, Province of China Duration: Oct 21 2015 → Oct 24 2015

Other

Other	IEEE International Ultrasonics Symposium, IUS 2015
Country/Territory	Taiwan, Province of China
City	Taipei
Period	10/21/15 → 10/24/15

Keywords

shear wave imaging
Transverse isotropy
Ultrasound

ASJC Scopus subject areas

Acoustics and Ultrasonics

Access to Document

10.1109/ULTSYM.2015.0217

Cite this

In-plane anisotropy method for the characterization of the elastic properties of anisotropic materials. / Aristizabal, Sara; Nenadic, Ivan Z.; Qiang, Bo et al.

2015 IEEE International Ultrasonics Symposium, IUS 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7329611.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Aristizabal, S, Nenadic, IZ, Qiang, B, Amador, C, Greenleaf, JF & Urban, MW 2015, In-plane anisotropy method for the characterization of the elastic properties of anisotropic materials. in 2015 IEEE International Ultrasonics Symposium, IUS 2015., 7329611, Institute of Electrical and Electronics Engineers Inc., IEEE International Ultrasonics Symposium, IUS 2015, Taipei, Taiwan, Province of China, 10/21/15. https://doi.org/10.1109/ULTSYM.2015.0217

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abstract = "Acoustic radiation force-based methods have the ability of estimating tissue viscoelastic material properties. A limitation of the current methods exists when the estimation of the mechanical properties is performed under the assumption that the tissue is isotropic and homogeneous thus, neglecting the inherent anisotropy nature of certain tissues. Currently to facilitate the estimation of the elastic parameters of these types of tissues, it is common to assume that these anisotropic biological media can be modeled as being transversely isotropic (TI). Based on this assumption mechanical properties of these tissues are evaluated by measuring the shear wave velocity at different angles by rotating the tissue with respect to the transducer, where 0° and 180° are defined along the fibers, and 90° and 270° across the fibers. The characterization of the behavior of anisotropic materials by the abovementioned method presents numerous limitations that can be overcome by a simplified approach to estimate the TI shear moduli by measuring the shear waves in a single B-mode imaging plane. We refer to this method as In-Plane Anisotropy (IPA) technique. To investigate the feasibility of the IPA method, we used a finite element model (FEM) of the shear wave propagation in an elastic TI media, and we evaluated the anisotropic characteristics of a phantom incorporating fibrous material with preferential orientations and a sample of pork tenderloin.",

keywords = "shear wave imaging, Transverse isotropy, Ultrasound",

author = "Sara Aristizabal and Nenadic, {Ivan Z.} and Bo Qiang and Carolina Amador and Greenleaf, {James F} and Urban, {Matthew W}",

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doi = "10.1109/ULTSYM.2015.0217",

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AU - Aristizabal, Sara

AU - Nenadic, Ivan Z.

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AU - Urban, Matthew W

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AB - Acoustic radiation force-based methods have the ability of estimating tissue viscoelastic material properties. A limitation of the current methods exists when the estimation of the mechanical properties is performed under the assumption that the tissue is isotropic and homogeneous thus, neglecting the inherent anisotropy nature of certain tissues. Currently to facilitate the estimation of the elastic parameters of these types of tissues, it is common to assume that these anisotropic biological media can be modeled as being transversely isotropic (TI). Based on this assumption mechanical properties of these tissues are evaluated by measuring the shear wave velocity at different angles by rotating the tissue with respect to the transducer, where 0° and 180° are defined along the fibers, and 90° and 270° across the fibers. The characterization of the behavior of anisotropic materials by the abovementioned method presents numerous limitations that can be overcome by a simplified approach to estimate the TI shear moduli by measuring the shear waves in a single B-mode imaging plane. We refer to this method as In-Plane Anisotropy (IPA) technique. To investigate the feasibility of the IPA method, we used a finite element model (FEM) of the shear wave propagation in an elastic TI media, and we evaluated the anisotropic characteristics of a phantom incorporating fibrous material with preferential orientations and a sample of pork tenderloin.

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In-plane anisotropy method for the characterization of the elastic properties of anisotropic materials

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