Abstract
Real-time Fourier domain optical coherence tomography (FDOCT) has been widely used in clinical applications. In order to accelerate the imaging processing and display of FDOCT, an alternative lookup table-based strategy for logarithmic transformation was presented. In this paper, real-time and high-quality FDOCT imaging display of biological tissues at an A-line rate of 62 kHz was demonstrated by optimizing the logarithmic calculation.
Highlights
Optical coherence tomography (OCT) is a noninvasive, high-resolution optical imaging technique that can provide a cross-sectional and three-dimensional structure of biological tissues in micrometer scale [1]
time domain OCT (TDOCT) acquires interference signal based on mechanical scanning of reference arm, the scanning rate is limited by the hardware
Fourier domain OCT (FDOCT) that obtains the structural information by evaluation of the interference spectrum is capable of a much higher scan rate since no scanning of the reference arm is needed
Summary
Optical coherence tomography (OCT) is a noninvasive, high-resolution optical imaging technique that can provide a cross-sectional and three-dimensional structure of biological tissues in micrometer scale [1]. By mapping logarithmically transformed raw data to a series of fixed gray values to adapt the psychological properties of the human eyes, weak backscattered signals can be visualized more clearly with a compressed dynamic range [3]. For this reason, logarithmic transformation has become a standard procedure for OCT signal processing. A low cost and less complex technique to accelerate OCT especially logarithmic calculation for real-time display, is attractive. A lookup table method is proposed to improve the processing speed of logarithmic transformation in FDOCT
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