Measuring tissue dispersion using the cross-correlation of half-spectrum optical coherence tomography images

Christos Photiou; Evgenia Bousi; Ioanna Zouvani; Costas Pitris

doi:10.1117/12.2510949

22 February 2019 Measuring tissue dispersion using the cross-correlation of half-spectrum optical coherence tomography images

Christos Photiou, Evgenia Bousi, Ioanna Zouvani, Costas Pitris

Author Affiliations +

Proceedings Volume 10867, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIII; 108670D (2019) https://doi.org/10.1117/12.2510949
Event: SPIE BiOS, 2019, San Francisco, California, United States

Abstract

In Optical Coherence tomography (OCT), dispersion mismatches cause degradation of the image resolution and are, thus, compensated accordingly. However, dispersion is specific to the material that is causing the effect and can, therefore, carry useful information regarding the composition of the samples. In this summary, we propose a novel technique for estimating tissue dispersion by calculating the cross-correlation of images acquired at different center wavelengths to estimate the shift between their features, also known as walk-off, and use that to calculate the dispersion. Since a distinct reflector is not required, this method is applicable to any sample and can even be implemented in vivo and in situ in human tissues. The proposed technique was verified ex vivo resulting in Group Velocity Dispersion (GVD) values comparable to those obtained from estimating the walk-off from a mirror, as described in the literature. The applicability to cancer diagnosis was evaluated on a small set of gastrointestinal normal and cancer OCT images. Using the statistics of the GVD estimates, tissue classification resulted in 100% sensitivity and 81% specificity (92% correct classification rate). The success of these preliminary results indicates the potential of the proposed method, which should be further investigated to elucidate its advantages and limitations.

Conference Presentation

Citation Download Citation

Christos Photiou, Evgenia Bousi, Ioanna Zouvani, and Costas Pitris "Measuring tissue dispersion using the cross-correlation of half-spectrum optical coherence tomography images", Proc. SPIE 10867, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIII, 108670D (22 February 2019); https://doi.org/10.1117/12.2510949

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available