Determination of Poisson Ratio of Bovine Extraocular Muscle by Computed X-Ray Tomography
Joint Authors
Kim, Hansang
Shin, Andrew
Demer, Joseph L.
Yoo, Lawrence
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-12-30
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Abstract EN
The Poisson ratio (PR) is a fundamental mechanical parameter that approximates the ratio of relative change in cross sectional area to tensile elongation.
However, the PR of extraocular muscle (EOM) is almost never measured because of experimental constraints.
The problem was overcome by determining changes in EOM dimensions using computed X-ray tomography (CT) at microscopic resolution during tensile elongation to determine transverse strain indicated by the change in cross-section.
Fresh bovine EOM specimens were prepared.
Specimens were clamped in a tensile fixture within a CT scanner (SkyScan, Belgium) with temperature and humidity control and stretched up to 35% of initial length.
Sets of 500–800 contiguous CT images were obtained at 10-micron resolution before and after tensile loading.
Digital 3D models were then built and discretized into 6–8-micron-thick elements.
Changes in longitudinal thickness of each microscopic element were determined to calculate strain.
Green’s theorem was used to calculate areal strain in transverse directions orthogonal to the stretching direction.
The mean PR from discretized 3D models for every microscopic element in 14 EOM specimens averaged 0.457±0.004 (SD).
The measured PR of bovine EOM is thus near the limit of incompressibility.
American Psychological Association (APA)
Kim, Hansang& Yoo, Lawrence& Shin, Andrew& Demer, Joseph L.. 2012. Determination of Poisson Ratio of Bovine Extraocular Muscle by Computed X-Ray Tomography. BioMed Research International،Vol. 2013, no. 2013, pp.1-5.
https://search.emarefa.net/detail/BIM-1030184
Modern Language Association (MLA)
Kim, Hansang…[et al.]. Determination of Poisson Ratio of Bovine Extraocular Muscle by Computed X-Ray Tomography. BioMed Research International No. 2013 (2013), pp.1-5.
https://search.emarefa.net/detail/BIM-1030184
American Medical Association (AMA)
Kim, Hansang& Yoo, Lawrence& Shin, Andrew& Demer, Joseph L.. Determination of Poisson Ratio of Bovine Extraocular Muscle by Computed X-Ray Tomography. BioMed Research International. 2012. Vol. 2013, no. 2013, pp.1-5.
https://search.emarefa.net/detail/BIM-1030184
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1030184