Null strain analysis of submerged aneurysm analogues using a novel 3D stereomicroscopy device

To measure the inhomogeneous 3D-strain fields present during inflation-extension testing of physiologically submerged micro-aneurysms, a Stereo Digital Image Correlation (StereoDIC) microscopy system is developed that revolves 15 ° stereo-angle cameras around a centrally-mounted target. Calibration...

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Bibliographic Details
Published in:Computer methods in biomechanics and biomedical engineering 2020-06, Vol.23 (8), p.332-344
Main Authors: Lane, Brooks A., Lessner, Susan M., Vyavahare, Narendra R., Sutton, Michael A., Eberth, John F.
Format: Article
Language:English
Subjects:
Aneurysm
aortic aneurysm
Calibration
Cameras
cerebral aneurysms
Deformation analysis
Digital imaging
Rigid structures
Standard deviation
Stereo DIC
Stereomicroscopy
Tensors
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Summary:To measure the inhomogeneous 3D-strain fields present during inflation-extension testing of physiologically submerged micro-aneurysms, a Stereo Digital Image Correlation (StereoDIC) microscopy system is developed that revolves 15 ° stereo-angle cameras around a centrally-mounted target. Calibration is performed using submerged dot patterns and system accuracy verified using strain and deformation analyses for rigid body motions of speckle-patterned, micro-aneurysmal surrogates. In terms of the Green-Lagrange strain tensor and the 3D displacement fields, the results are stable even after 120 minutes, with maxima in both strain bias and strain standard deviation less than 2E-03 for all components, and micron-level displacement standard deviation.
ISSN:1025-5842
1476-8259
DOI:10.1080/10255842.2020.1724974