Long working distance optical coherence tomography for pediatric imaging
(Conference Presentation)

Ruobing Qian; Oscar Carrasco-Zevallos; Lejla Vajzovic M.D.; Boris I. Gramatikov; David L. Guyton M.D.; Cynthia A. Toth M.D.; Joseph A Izatt

doi:10.1117/12.2213278

26 April 2016 Long working distance optical coherence tomography for pediatric imaging (Conference Presentation)

Ruobing Qian, Oscar Carrasco-Zevallos, Lejla Vajzovic M.D., Boris I. Gramatikov, David L. Guyton M.D., Cynthia A. Toth M.D., Joseph A Izatt

Author Affiliations +

Proceedings Volume 9693, Ophthalmic Technologies XXVI; 969308 (2016) https://doi.org/10.1117/12.2213278
Event: SPIE BiOS, 2016, San Francisco, California, United States

Abstract

Conventional optical coherence tomography (OCT) systems have working distances of about 25 mm, and require cooperative subjects to immobilize and fixate on a target. Handheld OCT probes have also been demonstrated for successful imaging of pre-term infants and neonates up to ~1 year old. However, no technology yet exists for OCT in young children due to their lack of attention and inherent fear of large objects close to their face. In this work, we demonstrate a prototype retinal swept-source OCT system with a long working distance (from the last optical element to the subject’s eye) to facilitate pediatric imaging. To reduce the footprint and weight of the system compared to the conventional 4f scheme, a novel 2f scanning configuration was implemented to achieve a working distance of 348mm with a +/- 8° scanning angle prior to cornea. Employing two custom-designed lenses, the system design resolution was nearly diffraction limited throughout a -8D to +5D refractive corrections. A fixation target displayed on a LCD monitor and an iris camera were used to facilitate alignment and imaging. Our prototype was tested in consented adult subjects and has the potential to facilitate imaging of young children. With this apparatus, young children could potentially sit comfortably in caretaker’s lap while viewing entertainment on the fixation screen designed to direct their gaze into the imaging apparatus.

Conference Presentation

Citation Download Citation

Ruobing Qian, Oscar Carrasco-Zevallos, Lejla Vajzovic M.D., Boris I. Gramatikov, David L. Guyton M.D., Cynthia A. Toth M.D., and Joseph A Izatt "Long working distance optical coherence tomography for pediatric imaging (Conference Presentation)", Proc. SPIE 9693, Ophthalmic Technologies XXVI, 969308 (26 April 2016); https://doi.org/10.1117/12.2213278

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KEYWORDS

Optical coherence tomography

Imaging systems

Prototyping

Cornea

Diffraction

Eye

Lens design

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