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14 March 2018 Imaging skin with full field optical coherence tomography: from subsurface fingerprints to blood flow (Conference Presentation)
Egidijus Auksorius, Albert Claude Boccara
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Proceedings Volume 10467, Photonics in Dermatology and Plastic Surgery 2018; 1046702 (2018) https://doi.org/10.1117/12.2288399
Event: SPIE BiOS, 2018, San Francisco, California, United States
Abstract
Optical coherence tomography (OCT) has become a useful skin imaging tool in recent years. It can be used to image skin structure with great detail and deep below the surface. However, there is an unmet need for an inexpensive device that would be able to acquire high-quality en face images in short time. To this end, we report on a cost-effective full-field optical coherent tomography (FF-OCT) system comprised of a silicon camera with high full well capacity and a powerful near-infrared LED light source. The system, for example, is able to record 1.7 cm × 1.7 cm en face images in 0.12 sec with the spatial sampling rate of 2116 dpi and the sensitivity of 93 dB. We show that the FF-OCT system can be used for biometrics purposes by imaging internal fingerprints and sweat ducts with a good contrast and in short-enough time. Blood flow can also be sensed in dermis that, for example, can be used for liveness detection. The developed instrument could also be used in other en face deep-tissue imaging applications because of its high sensitivity and speed. One particular application is passive elastography that can map the stiffness of biological tissues. We will also present FF-OCT configurations that help improving the imaging depth through rejection of specular reflections and better use of a light budget.
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Egidijus Auksorius and Albert Claude Boccara "Imaging skin with full field optical coherence tomography: from subsurface fingerprints to blood flow (Conference Presentation)", Proc. SPIE 10467, Photonics in Dermatology and Plastic Surgery 2018, 1046702 (14 March 2018); https://doi.org/10.1117/12.2288399
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KEYWORDS
Optical coherence tomography
Skin
Imaging systems
Blood circulation
Cameras
Light emitting diodes
Light sources
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