Share Email Print
cover

Optical Engineering

Real-time reference A-line subtraction and saturation artifact removal using graphics processing unit for high-frame-rate Fourier-domain optical coherence tomography video imaging
Author(s): Yong Huang; Jin U. Kang
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Variations in the spectral shape and the amplitude of the optical coherence tomography (OCT) signal and reference cause fixed-pattern noise and light reflected from a highly specular surface might cause saturation artifacts. In real-time video-rate OCT imaging, these effects make the OCT video image appear unstable and difficult to view. To eliminate these problems, we implemented real-time reference A-line subtraction and saturation detection and correction on standard Fourier-domain optical coherence tomography (FD-OCT) video imaging frame-by-frame. This real-time OCT data processing method eliminates the need for the physical reference measurement procedure and automatically detects and corrects saturated A-scans if there is any within one frame. This technique is also robust to the reference and signal amplitude variations, and provides higher signal-to-noise ratio compared to the normal fixed-reference subtraction method. To implement an effective interventional OCT imaging system, the technique was integrated along with other graphics processing unit-based OCT processing techniques [resampling, dispersion compensation, fast Fourier transform, log-scaling, and soft-thresholding]. The real-time fixed-pattern artifact-free FD-OCT imaging was achieved at 70  frames/s for a frame size of 1000 (lateral) by 1024 (axial) pixels. The theoretical maximum processing and rendering rate was measured to be 266,000  A-scans/s.

Paper Details

Date Published: 6 July 2012
PDF: 6 pages
Opt. Eng. 51(7) 073203 doi: 10.1117/1.OE.51.7.073203
Published in: Optical Engineering Volume 51, Issue 7
Show Author Affiliations
Yong Huang, Johns Hopkins Univ. (United States)
Jin U. Kang, Johns Hopkins Univ. (United States)


© SPIE. Terms of Use
Back to Top