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Sensors 2012, 12(6), 6920-6929; doi:10.3390/s120606920

Ultra-Fast Displaying Spectral Domain Optical Doppler Tomography System Using a Graphics Processing Unit

1 School of Electrical Engineering and Computer Science, Kyungpook National University, 1370, Sankyuk-dong, Buk-gu, Daegu 702-701, Korea 2 Division of General Studies, Ulsan National Institute of Science and Technology, Ulsan 689-798, Korea
* Author to whom correspondence should be addressed.
Received: 22 March 2012 / Revised: 2 May 2012 / Accepted: 21 May 2012 / Published: 25 May 2012
(This article belongs to the Section Physical Sensors)
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We demonstrate an ultrafast displaying Spectral Domain Optical Doppler Tomography system using Graphics Processing Unit (GPU) computing. The calculation of FFT and the Doppler frequency shift is accelerated by the GPU. Our system can display processed OCT and ODT images simultaneously in real time at 120 fps for 1,024 pixels × 512 lateral A-scans. The computing time for the Doppler information was dependent on the size of the moving average window, but with a window size of 32 pixels the ODT computation time is only 8.3 ms, which is comparable to the data acquisition time. Also the phase noise decreases significantly with the window size. Since the performance of a real-time display for OCT/ODT is very important for clinical applications that need immediate diagnosis for screening or biopsy. Intraoperative surgery can take much benefit from the real-time display flow rate information from the technology. Moreover, the GPU is an attractive tool for clinical and commercial systems for functional OCT features as well.
Keywords: ODT; OCT; GPU; real-time; CUDA ODT; OCT; GPU; real-time; CUDA
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Jeong, H.; Cho, N.H.; Jung, U.; Lee, C.; Kim, J.-Y.; Kim, J. Ultra-Fast Displaying Spectral Domain Optical Doppler Tomography System Using a Graphics Processing Unit. Sensors 2012, 12, 6920-6929.

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