Retinal fundus imaging with a plenoptic sensor

Brice Thurin; Edward Bloch; Sotiris Nousias; Sebastien Ourselin; Pearse Keane; Christos Bergeles

doi:10.1117/12.2286448

19 February 2018 Retinal fundus imaging with a plenoptic sensor

Brice Thurin, Edward Bloch, Sotiris Nousias, Sebastien Ourselin, Pearse Keane, Christos Bergeles

Proceedings Volume 10474, Ophthalmic Technologies XXVIII; 1047429 (2018) https://doi.org/10.1117/12.2286448
Event: SPIE BiOS, 2018, San Francisco, California, United States

Abstract

Vitreoretinal surgery is moving towards 3D visualization of the surgical field. This require acquisition system capable of recording such 3D information. We propose a proof of concept imaging system based on a light-field camera where an array of micro-lenses is placed in front of a conventional sensor. With a single snapshot, a stack of images focused at different depth are produced on the fly, which provides enhanced depth perception for the surgeon. Difficulty in depth localization of features and frequent focus-change during surgery are making current vitreoretinal heads-up surgical imaging systems cumbersome to use. To improve the depth perception and eliminate the need to manually refocus on the instruments during the surgery, we designed and implemented a proof-of-concept ophthalmoscope equipped with a commercial light-field camera. The sensor of our camera is composed of an array of micro-lenses which are projecting an array of overlapped micro-images. We show that with a single light-field snapshot we can digitally refocus between the retina and a tool located in front of the retina or display an extended depth-of-field image where everything is in focus. The design and system performances of the plenoptic fundus camera are detailed. We will conclude by showing in vivo data recorded with our device.

Citation Download Citation

Brice Thurin, Edward Bloch, Sotiris Nousias, Sebastien Ourselin, Pearse Keane, and Christos Bergeles "Retinal fundus imaging with a plenoptic sensor", Proc. SPIE 10474, Ophthalmic Technologies XXVIII, 1047429 (19 February 2018); https://doi.org/10.1117/12.2286448

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