Oct angiography calculation with optimized signal processing
AssigneeTopcon Corporation
InventorsCharles A. Reisman, Zhenguo Wang, Atsushi Kubota, Jonathan Liu
Life of this patent
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Abstract
Methods and systems for angiographic imaging with optical coherence tomography (OCT) are described using ratio-based and angiographic deviation based calculations. In using these calculations to determine motion, arbitrary interframe permutations may be used, post- calculated, non-linear results for projection visualization may be averaged, poor matches may be eliminated on an A-line by A-line basis, windowing functions may be used to improve results, partial spectrums may be used when capturing data, and a minimum intensity threshold may be used for determining which pixels to use.
Claims15
An angiographic optical coherence tomography (OCT) method comprising:
- calculating values of OCT images of a volume, the OCT images being frames repeatedly captured from a same location of the volume;
- generating an angiographic image based on the calculated values;
- and
- displaying, rendering, and/or storing the angiographic image,
- wherein the values are calculated by comparing respective pixels of a permutation of interframe combinations of the OCT images.
Dependencies are inferred from the claim text.