Fig. 4.

Left: Data processing on the host computer. After the acquisition, the data is transferred into GPU RAM. The NVidia GTX690 is a dual GPU card. The first GPU performs OCT data processing while the second GPU is dedicated to 3D visualization using a ray caster. Right: Screen shots from NVidia visual profiler showing the timing sequence of OCT data processing. The 4 steps in the most zoomed-in view are resampling and apodizing (violet), FFT (cyan), magnitude compression (red) and copying into the output texture memory (yellow).