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Proceedings Paper

FPGA-based real-time swept-source OCT systems for B-scan live-streaming or volumetric imaging
Author(s): Vinzenz Bandi; Josef Goette; Marcel Jacomet; Tim von Niederhäusern; Adrian H. Bachmann; Marcus Duelk
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Paper Abstract

We have developed a Swept-Source Optical Coherence Tomography (Ss-OCT) system with high-speed, real-time signal processing on a commercially available Data-Acquisition (DAQ) board with a Field-Programmable Gate Array (FPGA). The Ss-OCT system simultaneously acquires OCT and k-clock reference signals at 500MS/s. From the k-clock signal of each A-scan we extract a remap vector for the k-space linearization of the OCT signal. The linear but oversampled interpolation is followed by a 2048-point FFT, additional auxiliary computations, and a data transfer to a host computer for real-time, live-streaming of B-scan or volumetric C-scan OCT visualization. We achieve a 100 kHz A-scan rate by parallelization of our hardware algorithms, which run on standard and affordable, commercially available DAQ boards. Our main development tool for signal analysis as well as for hardware synthesis is MATLAB® with add-on toolboxes and 3rd-party tools.

Paper Details

Date Published: 20 March 2013
PDF: 6 pages
Proc. SPIE 8571, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII, 85712Z (20 March 2013); doi: 10.1117/12.2006986
Show Author Affiliations
Vinzenz Bandi, Berner Fachhochschule Technik und Informatik (Switzerland)
Josef Goette, Berner Fachhochschule Technik und Informatik (Switzerland)
Marcel Jacomet, Berner Fachhochschule Technik und Informatik (Switzerland)
Tim von Niederhäusern, Exalos AG (Switzerland)
Adrian H. Bachmann, Exalos AG (Switzerland)
Marcus Duelk, Exalos AG (Switzerland)

Published in SPIE Proceedings Vol. 8571:
Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII
James G. Fujimoto; Joseph A. Izatt; Valery V. Tuchin, Editor(s)

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