Accuracy and precision of digital volume correlation in quantifying displacements and strains in trabecular bone.

Accuracy and precision of digital volume correlation in quantifying displacements and strains in trabecular bone. Research Abstract Details 

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Accuracy and precision of digital volume correlation in quantifying displacements and strains in trabecular bone. Abstract Text:

Li Liu,Elise F Morgan,Li Liu,Elise F Morgan,Li Liu,Elise F Morgan,

Strain measurement is an essential tool in the study of trabecular bone structure-function relationships. Digital volume correlation (DVC) is a measurement technique that quantifies strains throughout the interior of a specimen, rather than simply those on the surface. DVC relies on tracking the movement of microstructural features, and as such, the accuracy and precision of this technique may depend on trabecular structure. This study quantified displacement and strain measurement errors in six types of trabecular bone that spanned a wide range of volume fraction and trabecular architecture. Accuracy and precision were compared across bone type and also across three DVC methods. Both simulated and real displacement fields were analyzed using micro-computed tomography images of specimens from the bovine distal femur, bovine proximal tibia, rabbit distal femur, rabbit proximal tibia, rabbit vertebra, and human vertebra. Differences as large as three-fold in accuracy and precision of the displacements and strains were found among DVC methods and among bone types. The displacement precision and the strain accuracy and precision were correlated with measures of trabecular structure such as structural model index. These results demonstrate that the performance of the DVC technique can depend on trabecular structure. Across all bone types, the displacement and strain errors ranged 1.86-3.39mum and 345-794muepsilon, respectively. For specimens from the human vertebra and bovine distal femur, the measurement errors were approximately 20 times smaller than the yield strain. In these cases, DVC is a viable technique for measuring pre- and post-yield strains throughout trabecular bone specimens and the trabecular compartment of whole bones.

Accuracy and precision of digital volume correlation in quantifying displacements and strains in trabecular bone. Publishing Authors By Initials

L Liu,EF Morgan,L Liu,EF Morgan,L Liu,EF Morgan,

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Accuracy and precision of digital volume correlation in quantifying displacements and strains in trabecular bone. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of biomechanics

VOLUME: 40

Page Numbers: 3516-20

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ISSN: 0021-9290

DAY: 13

MONTH: 06

YEAR: 2007

Accuracy and precision of digital volume correlation in quantifying displacements and strains in trabecular bone. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Accuracy and precision of digital volume correlation in quantifying displacements and strains in trabecular bone.

AFFILIATION: Boston University, 110 Cummington Street, Boston, MA 02215, USA.

Country: United States

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MEDLINETA: J Biomech

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