Ultra-fast line-field low coherence holographic elastography using spatial phase shifting

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Ultra-fast line-field low coherence holographic elastography using spatial phase shifting	2 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1364/BOE.8.000993

Title: Ultra-fast line-field low coherence holographic elastography using spatial phase shifting
Creator: Liu, Chih-Hao
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Raghunathan, Raksha
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Wu, Chen
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Singh, Manmohan
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Han, Zhaolong
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Nair, Achuth
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Larin, Kirill V.
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Schill, Alexander
Date: 2017
DOI: 10.1364/BOE.8.000993
Description: Optical coherence elastography (OCE) is an emerging technique for quantifying tissue biomechanical properties. Generally, OCE relies on point-by-point scanning. However, long acquisition times make point-by-point scanning unfeasible for clinical use. Here we demonstrate a noncontact single shot line-field low coherence holography system utilizing an automatic Hilbert transform analysis based on a spatial phase shifting technique. Spatio-temporal maps of elastic wave propagation were acquired with only one air-pulse excitation and used to quantify wave velocity and sample mechanical properties at a line rate of 200 kHz. Results obtained on phantoms were correlated with data from mechanical testing. Finally, the stiffness of porcine cornea at different intraocular pressures was also quantified in situ.

Created: 29-01-2018

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Научное управление Ultra-fast line-field low coherence holographic elastography using spatial phase shifting