Three-Dimensional Full-Range Dual-Band Fourier Domain Optical Coherence Tomography Accelerated by Graphic Processing Unit

The authors present a graphic processing unit (GPU) accelerated three-dimensional (3-D) full-range dual-band Fourier domain optical coherence tomography (FD-OCT) using a LabVIEW GPU program with GPU-adaptable algorithms. GPU can dramatically reduce the image processing time, but programing on GPU is more complex than that on central processing unit (CPU). This study implements CPU computing interfaced with LabVIEW, using a LabVIEW GPU analysis toolkit, which significantly reduces the programing complexity. The selected algorithms are suitable for GPU computing in multiband FD-OCT. The developed system overcomes the problem of long image processing time relative to data acquisition time in CPU. A 65-Hz frame rate is achieved for acquiring, processing, and displaying 2 x 450 x 800 full-range dual-band FD-OCT images. The high-speed processing made it possible to interactively display 3-D dual-band FD-OCT images in a real time, showing the potential application for improving multinctional OCT systems currently using complex algorithms.