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Updated: May 9, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
Published on: September 18, 2012
Graphics processing unit accelerated intensity-based optical coherence tomography angiography using differential
Yuuki Watanabe1, Yuhei Takahashi, Hiroshi Numazawa
1Yamagata University, Bio-systems Engineering, Graduate School of Science and Engineering, 4-3-16 Johnan, Yonezawa, Yamagata 992-8510, Japan. ywata@yz.yamagata-u.ac.jp
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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