April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
Widefield Imaging of the retina using Swept Source OCT
Author Affiliations & Notes
  • Harihar Narasimha-Iyer
    Advanced Development, Carl Zeiss Meditec Inc, Dublin, CA
  • Michal Laron
    Clinical Affairs, Carl Zeiss Meditec Inc, Dublin, CA
  • Mary K Durbin
    Advanced Development, Carl Zeiss Meditec Inc, Dublin, CA
  • Sowmya Srinivas
    Doheny Eye Institute, Los Angeles, CA
  • Srinivas R Sadda
    Doheny Eye Institute, Los Angeles, CA
  • Giovanni Gregori
    Bascom Palmer Eye Institute, Miami, FL
  • Philip J Rosenfeld
    Bascom Palmer Eye Institute, Miami, FL
  • Footnotes
    Commercial Relationships Harihar Narasimha-Iyer, Carl Zeiss Meditec Inc (E); Michal Laron, Carl Zeiss Meditec Inc (E); Mary Durbin, Carl Zeiss Meditec Inc (E); Sowmya Srinivas, Carl Zeiss Meditec (F); Srinivas Sadda, Carl Zeiss Meditec Inc (F); Giovanni Gregori, Carl Zeiss Meditec Inc (F); Philip Rosenfeld, Carl Zeiss Meditec Inc (F)
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 1617. doi:
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      Harihar Narasimha-Iyer, Michal Laron, Mary K Durbin, Sowmya Srinivas, Srinivas R Sadda, Giovanni Gregori, Philip J Rosenfeld; Widefield Imaging of the retina using Swept Source OCT. Invest. Ophthalmol. Vis. Sci. 2014;55(13):1617.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract
 
Purpose
 

To obtain OCT images with field of view greater than possible with individual OCT cube scans.

 
Methods
 

Ten eyes including normal eyes and eyes with different retinal pathologies were imaged using a custom prototype swept source OCT system. The system supported acquisition of 12mmx9mmx3mm cube OCT scans. In one protocol, the subjects were asked to fixate centrally and then at a position temporal from the central location. In another protocol, the subjects were asked to fixate on fixation locations superior and inferior to the fovea. The fixation locations were chosen such that there was some overlap between the OCT scan regions for the two scans. The corresponding pair of OCT scans were then registered using custom software and information available from both of the scans.

 
Results
 

OCT images with a field of view of ~19mmx10mmx4.5mm and ~12mmx13.5mmx4.5mm were obtained allowing visualization of widefield OCT B-Scans. Using the same registration software, we generated widefield retinal thickness maps as well as OCT slab images to better visualize the retinal anatomy and pathologies. An example is shown in Figure 1, showing peripheral lesions.

 
Conclusions
 

Methods have been described to obtain OCT scans with wide field of view by combining multiple OCT cube scans. The combined image allows visualization of OCT features over a larger field of view than previously available, showing peripheral anatomy and putting macular observations into a more complete anatomical context.

 
 
Figure 1: Widefield OCT enface image for an eye with Diabetic Retonopathy
 
Figure 1: Widefield OCT enface image for an eye with Diabetic Retonopathy
 
Keywords: 550 imaging/image analysis: clinical • 549 image processing • 552 imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound)  
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