An Iterative Method for Estimating Nonlinear Elastic Constants of Tumor in Soft Tissue from Approximate Displacement Measurements

Joint Authors

Dastjerdi, Maryam Mehdizadeh
Fallah, Ali
Rashidi, Saeid

Source

Journal of Healthcare Engineering

Issue

Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-12, 12 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2019-01-06

Country of Publication

Egypt

No. of Pages

12

Main Subjects

Public Health
Medicine

Abstract EN

Objectives.

Various elastography techniques have been proffered based on linear or nonlinear constitutive models with the aim of detecting and classifying pathologies in soft tissues accurately and noninvasively.

Biological soft tissues demonstrate behaviors which conform to nonlinear constitutive models, in particular the hyperelastic ones.

In this paper, we represent the results of our steps towards implementing ultrasound elastography to extract hyperelastic constants of a tumor inside soft tissue.

Methods.

Hyperelastic parameters of the unknown tissue have been estimated by applying the iterative method founded on the relation between stress, strain, and the parameters of a hyperelastic model after (a) simulating the medium’s response to a sinusoidal load and extracting the tissue displacement fields in some instants and (b) estimating the tissue displacement fields from the recorded/simulated ultrasound radio frequency signals and images using the cross correlation-based technique.

Results.

Our results indicate that hyperelastic parameters of an unidentified tissue could be precisely estimated even in the conditions where there is no prior knowledge of the tissue, or the displacement fields have been approximately calculated using the data recorded by a clinical ultrasound system.

Conclusions.

The accurate estimation of nonlinear elastic constants yields to the correct cognizance of pathologies in soft tissues.

American Psychological Association (APA)

Dastjerdi, Maryam Mehdizadeh& Fallah, Ali& Rashidi, Saeid. 2019. An Iterative Method for Estimating Nonlinear Elastic Constants of Tumor in Soft Tissue from Approximate Displacement Measurements. Journal of Healthcare Engineering،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1175070

Modern Language Association (MLA)

Dastjerdi, Maryam Mehdizadeh…[et al.]. An Iterative Method for Estimating Nonlinear Elastic Constants of Tumor in Soft Tissue from Approximate Displacement Measurements. Journal of Healthcare Engineering No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1175070

American Medical Association (AMA)

Dastjerdi, Maryam Mehdizadeh& Fallah, Ali& Rashidi, Saeid. An Iterative Method for Estimating Nonlinear Elastic Constants of Tumor in Soft Tissue from Approximate Displacement Measurements. Journal of Healthcare Engineering. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1175070

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1175070