Abstract

Full range imaging is of high interest in frequency domain (FD) optical coherence tomography (OCT), and dispersion encoded full range (DEFR) OCT has emerged as an effective technique with only minor additional hardware requirements. We present an advanced DEFR OCT algorithm, which increases the processing speed considerably by using only one Fourier transform per A-scan and convolution in z-space. While the initial DEFR algorithm effectively removes mirror artifacts, DC and autocorrelation artifacts are still prone to corrupt the reconstructed image. To address this issue, the presented advanced DEFR algorithm uses an additional Fourier transform per A-scan and removes DC and autocorrelation artifacts within the same regime, significantly improving the quality of the reconstructed image. The DEFR algorithm is inherently phase stable and hence provides access to Doppler measurements using standard Doppler processing. Online DEFR evaluation with more than 20 frames per second is achieved using GPU based processing.

© 2013 SPIE