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Ultrahigh-resolution optical coherence elastography
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DOI：10.1364/OL.41.000021.png)
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Abstract
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Visualizing stiffness within the local tissue environment at the cellular and subcellular level promises to provide insight into the genesis and progression of disease. In this Letter, we propose ultrahigh-resolution optical coherence elastography (UHROCE), and demonstrate 3D imaging of local axial strain of tissues undergoing compressive loading. We combine optical coherence microscopy (OCM) and phase-sensitive detection of local tissue displacement to produce strain elastograms with resolution (x,y,z) of 2 x 2 x 15 mu m. We demonstrate this performance on a freshly excised mouse aorta and reveal the mechanical heterogeneity of vascular smooth muscle cells and elastin sheets, otherwise unresolved in a typical, lower resolution optical coherence elastography (OCE) system. (C) 2015 Optical Society of America
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