Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Imaging of rapid flows using zero-crossing DOCT

Not Accessible

Your library or personal account may give you access

Abstract

This paper presents a novel Doppler OCT system capable of imaging flow velocities of up to 3.1 m/s in real-time without phase-aliasing artifacts well above current systems limited to a few cm/s.

Most current Doppler OCT systems use phase-resolved algorithms to extract scatterer velocity from successive A-lines. These rapid and precise methods however prevent imaging velocities above several cm/s because of phase-aliasing. To avoid such artifacts, we developed a zero-crossing time-domain OCT system using a delay line which provides a high carrier frequency at a 500 Hz A-line rate. A very high sampling rate combined with a zero-crossing algorithm gave access to a broad velocity range in real-time. Flows from 1 cm/s up to 3.1 m/s in both directions relative to the incident light were imaged. Turbulent regime and high velocity gradients were observed and 2D velocity vector maps were obtained.

© 2010 Optical Society of America

PDF Article
More Like This
Effects of multiple scattering on flow velocity profiles measured using DOCT

Julian Moger, C Peter Winlove, and Stephen J Matcher
MC4 European Conference on Biomedical Optics (ECBO) 2005

Doppler Optical Coherence Tomography for Flow Imaging with Optimized Digital Frequency Ramping Method

Zhijia Yuan, Zhongchi Luo, Hugang Ren, Congwu Du, and Yingtian Pan
BSuD14 Biomedical Optics (BIOMED) 2010

Doppler Flow Imaging using Optical Coherence Tomography

Joseph A. Izatt and Manish Kulkarni
CPD3 Conference on Lasers and Electro-Optics (CLEO:S&I) 1996

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved