Smoothed and Resolved Thresholding (SmaRT-) Display: A New OCTA Display Technique to Resolve the Low Flow Ambiguity

Yiu P, Moult EM, Ploner S, Lee B, Husvogt L, Maier A, Spaide RF, Duker JS, Waheed NK, Fujimoto JG (2017)

Publication Language: English

Publication Type: Conference contribution, Abstract of a poster

Publication year: 2017

Book Volume: 58

Pages Range: 653

Edition: 8

Conference Proceedings Title: Investigative Ophthalmology & Visual Science

Event location: Baltimore, MD, USA US

URI: https://www5.informatik.uni-erlangen.de/Forschung/Publikationen/2017/Yiu17-SAR.pdf

Abstract

Purpose : OCT angiography (OCTA) provides clinicians with a new perspective on ocular vasculature. However, OCTA is fundamentally different from OCT, and its complex processing steps generate new artifacts that are not present in OCT. The “thresholding” step in OCTA, which removes (makes black) regions of low OCT signal, results in an ambiguity between areas of low OCT signal and areas of low blood flow. In this study we present a new OCTA display technique, SmaRT-Display OCTA, which obviates this ambiguity.

Methods : We propose a mapping scheme based on the hue-saturation-value (HSV) colorspace wherein the OCT signal is mapped to a sigmoidal curve in the value coordinate, the unthresholded OCTA signal is mapped to the saturation coordinate, and the hue coordinate is fixed at red.

Results : SmaRT-Display removes low flow ambiguities in both cross-sectional and en face views.

Conclusions : SmaRT-Display has the potential to reduce misinterpretation of OCTA images and is a first step in expanding the standards of how OCTA data can be presented.

This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.

Authors with CRIS profile

Stefan Ploner Lehrstuhl für Informatik 5 (Mustererkennung) Lennart Husvogt Lehrstuhl für Informatik 5 (Mustererkennung) Andreas Maier Lehrstuhl für Informatik 5 (Mustererkennung)

Involved external institutions

Massachusetts Institute of Technology (MIT) US United States (USA) (US) Tufts Medical Center US United States (USA) (US) Northwell Health US United States (USA) (US)

How to cite

APA:

Yiu, P., Moult, E.M., Ploner, S., Lee, B., Husvogt, L., Maier, A.,... Fujimoto, J.G. (2017, June). Smoothed and Resolved Thresholding (SmaRT-) Display: A New OCTA Display Technique to Resolve the Low Flow Ambiguity. Poster presentation at ARVO Annual Meeting 2017, Baltimore, MD, USA, US.

MLA:

Yiu, Patrick, et al. "Smoothed and Resolved Thresholding (SmaRT-) Display: A New OCTA Display Technique to Resolve the Low Flow Ambiguity." Presented at ARVO Annual Meeting 2017, Baltimore, MD, USA 2017.

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