Graphics Processing Unit-Based Ultrahigh Speed Real-Time Fourier Domain Optical Coherence Tomography
This paper describes a series of novel graphics processing unit (GPU)-based image reconstruction and visualization methods that we developed for realizing ultrahigh speed, real-time Fourier domain optical coherence tomography (FD-OCT). Several GPU-based algorithms including high-speed linear/cubic interpolation, gridding-based nonuniform fast Fourier transform (NUFFT), numerical dispersion compensation, and multi-GPU implementation were developed to improve the point-spread function, SNR roll-off, and stability of the system. Full-range complex-conjugate-free FD-OCT was also implemented on the GPU architecture to double the imaging range and to improve the SNR. The maximum processing speed of >3 Gigavoxels/s (>6 Mega-A-scans/s of 1024-pixel ...
