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  • Title: Graphics processing unit accelerated intensity-based optical coherence tomography angiography using differential frames with real-time motion correction.
    Author: Watanabe Y, Takahashi Y, Numazawa H.
    Journal: J Biomed Opt; 2014 Feb; 19(2):021105. PubMed ID: 23846119.
    Abstract:
    We demonstrate intensity-based optical coherence tomography (OCT) angiography using the squared difference of two sequential frames with bulk-tissue-motion (BTM) correction. This motion correction was performed by minimization of the sum of the pixel values using axial- and lateral-pixel-shifted structural OCT images. We extract the BTM-corrected image from a total of 25 calculated OCT angiographic images. Image processing was accelerated by a graphics processing unit (GPU) with many stream processors to optimize the parallel processing procedure. The GPU processing rate was faster than that of a line scan camera (46.9 kHz). Our OCT system provides the means of displaying structural OCT images and BTM-corrected OCT angiographic images in real time.
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