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

Null strain analysis of submerged aneurysm analogues using a novel 3D stereomicroscopy device. Comput Methods Biomech Biomed Engin. 2020 Feb 18;:1-13 Authors: Lane BA, Lessner SM, Vyavahare NR, Sutton MA, Eberth JF Abstract 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. PMID: 32068431 [PubMed - as supplied by publisher]
Source: Computer Methods in Biomechanics and Biomedical Engineering - Category: Biomedical Engineering Authors: Tags: Comput Methods Biomech Biomed Engin Source Type: research