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Label-free volumetric imaging of conjunctival collecting lymphatics ex vivo by optical coherence tomography lymphangiography

Gong, Peijun, Yu, Dao-Yi, Wang, Qiang, Yu, Paula K., Karnowski, Karol, Heisler, Morgan, Francke, Ashley, An, Dong, Sarunic, Marinko V. and Sampson, David D. (2018) Label-free volumetric imaging of conjunctival collecting lymphatics ex vivo by optical coherence tomography lymphangiography Journal of Biophotonics, 11 (8), e201800070.

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Abstract

We employ optical coherence tomography (OCT) and optical coherence microscopy (OCM) to study conjunctival lymphatics in porcine eyes ex vivo. This study is a precursor to the development of in vivo imaging of the collecting lymphatics for potentially guiding and monitoring glaucoma filtration surgery. OCT scans at 1300 nm and higher‐resolution OCM scans at 785 nm reveal the lymphatic vessels via their optical transparency. Equivalent signal characteristics are also observed from blood vessels largely free of blood (and devoid of flow) in the ex vivo conjunctiva. In our lymphangiography, vessel networks were segmented by compensating the depth attenuation in the volumetric OCT/OCM signal, projecting the minimum intensity in two dimensions and thresholding to generate a three‐dimensional vessel volume. Vessel segmentation from multiple locations of a range of porcine eyes (n = 21) enables visualization of the vessel networks and indicates the varying spatial distribution of patent lymphatics. Such visualization provides a new tool to investigate conjunctival vessels in tissue ex vivo without need for histological tissue processing and a valuable reference on vessel morphology for the in vivo label‐free imaging studies of lymphatics to follow.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences
Authors :
NameEmailORCID
Gong, Peijun
Yu, Dao-Yi
Wang, Qiang
Yu, Paula K.
Karnowski, Karol
Heisler, Morgan
Francke, Ashley
An, Dong
Sarunic, Marinko V.
Sampson, David D.d.sampson@surrey.ac.uk
Date : 13 July 2018
DOI : 10.1002/jbio.201800070
Copyright Disclaimer : © 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
Uncontrolled Keywords : Aqueous veins; Blood vessels; Conjunctiva; Glaucoma; Lymphangiography; Lymphatics; Optical coherence tomography; Speckle decorrelation
Additional Information : Special Issue: Special Topic: Photonics meets Lymphatics
Depositing User : Clive Harris
Date Deposited : 18 Sep 2018 08:15
Last Modified : 09 Nov 2018 16:03
URI: http://epubs.surrey.ac.uk/id/eprint/849309

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