Effective bidirectional scanning pattern for optical coherence tomography angiography

Myeong Jin Ju, Morgan Heisler, Arman Athwal, Marinko V. Sarunic, Yifan Jian

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


We demonstrate the utility of a novel scanning method for optical coherence tomography angiography (OCTA). Although raster scanning is commonly used for OCTA imaging, a bidirectional approach would lessen the distortion caused by galvanometer-based scanners as sources continue to increase sweep rates. As shown, a unidirectional raster scan approach has a lower effective scanning time than bidirectional approaches; however, a strictly bidirectional approach causes contrast variation along the B-scan direction due to the non-uniform time interval between B-scans. Therefore, a stepped bidirectional approach is introduced and successfully applied to retinal imaging in normal controls and in a pathological subject with diabetic retinopathy.

Original languageEnglish (US)
Article number#323355
Pages (from-to)2336-2350
Number of pages15
JournalBiomedical Optics Express
Issue number5
StatePublished - May 1 2018
Externally publishedYes


  • Ophthalmic optics and devices
  • Ophthalmology
  • Optical coherence tomography

ASJC Scopus subject areas

  • Biotechnology
  • Atomic and Molecular Physics, and Optics


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