Ultra-Fast Displaying Spectral Domain Optical Doppler Tomography System Using a Graphics Processing Unit
The authors 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. Their system can display processed OCT and ODT images simultaneously in real time at 120 fps for 1,024 pixels x 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 8.3ms, which is comparable to the data acquisition time.