Projection artifact suppression for inner retina in oct angiography

Yihao Liu, Aaron Carass, Angeliki Filippatou, Yufan He, Sharon D. Solomon, Shiv Saidha, Peter A. Calabresi, Jerry L. Prince

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Optical coherence tomography (OCT) based angiography devices were introduced for research purposes in 2014 and are now appearing in clinical settings. OCT-A, as this is known, exhibits what is referred to as the shadowgraphic flow projection artifact, which causes blood vessels to have an elongated appearance in A-scans. Existing approaches for resolving this artifact rely on the flow signal in superficial layers along the same A-scan to remove projection artifacts in deeper layers, essentially treating the problem as a 1D correction. We however, propose to use characteristics of the projection artifacts in 3D. Specifically, we use the tailing effect of the shadowgraphic flow projection artifact to remove the artifacts in the inner retina. We demonstrate that our projection artifact suppression method (PAS-OCTA) produces better OCT-A images when compared with a previously reported correction method (PR-OCTA), both qualitatively and quantitatively.

Original languageEnglish (US)
Title of host publicationISBI 2019 - 2019 IEEE International Symposium on Biomedical Imaging
PublisherIEEE Computer Society
Number of pages5
ISBN (Electronic)9781538636411
StatePublished - Apr 2019
Event16th IEEE International Symposium on Biomedical Imaging, ISBI 2019 - Venice, Italy
Duration: Apr 8 2019Apr 11 2019

Publication series

NameProceedings - International Symposium on Biomedical Imaging
ISSN (Print)1945-7928
ISSN (Electronic)1945-8452


Conference16th IEEE International Symposium on Biomedical Imaging, ISBI 2019


  • Optical coherence tomography
  • Optical coherence tomography angiography
  • Projection artifact

ASJC Scopus subject areas

  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging


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