Imaging the human retina and cone mosaic in vivo with PS-OCT

M. Pircher; B. Baumann; E. Götzinger; C. K. Hitzenberger

doi:10.1117/12.703135

7 February 2007 Imaging the human retina and cone mosaic in vivo with PS-OCT

M. Pircher, B. Baumann, E. Götzinger, C. K. Hitzenberger

Proceedings Volume 6429, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XI; 64290T (2007) https://doi.org/10.1117/12.703135
Event: SPIE BiOS, 2007, San Jose, California, United States

Abstract

The application of polarization sensitive optical coherence tomography (PS-OCT) for imaging the human retina and the cone mosaic is presented. The system is based on a time domain technique which uses the fast (or priority) scan direction orthogonal to the incoming beam (parallel to the retinal surface). Using a resonant scanner operating at 4kHz, the system is capable to record 8000 transversal lines per second or 40 images per second (500(x)x200(y) pixels). There are some benefits of the transverse scanning technique for high transverse resolution imaging compared to fast A-scan based OCT systems (e.g. Fourier domain OCT). First, the possibility of dynamic focusing (to maintain high transverse resolution throughout imaging depth) and second the option of simultaneous recording of scanning laser ophthalmoscope (SLO) images. Since en-face images can be recorded with high speed, small structures in transverse direction (as the cone mosaic) can be recorded with greatly reduced motion artifacts. The instrument simultaneously retrieves backscattered intensity (standard OCT), retardation and fast axis orientation for each measurement location. Images with high isotropic resolution of the human retina including images of the cone mosaic are presented.

Citation Download Citation

M. Pircher, B. Baumann, E. Götzinger, and C. K. Hitzenberger "Imaging the human retina and cone mosaic in vivo with PS-OCT", Proc. SPIE 6429, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XI, 64290T (7 February 2007); https://doi.org/10.1117/12.703135

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