Speaker
Description
White continuous spectrum illumination (e.g. by LED) is widely used for diagnostic imaging in dermatology and endoscopy. We propose to replace it by combined triple discrete spectral line illumination using RGB laser emission launced into an optical fiber. This allows extracting three ultra-narrowband spectral line images from single-snapshot image data captured by a consumer-grade color camera [1-5] and opens new challenges for improved clinical diagnostics.
A pototype device comprising side-emitting optical fiber illuminator was developed for large-area skin spectral imaging at 450nm, 520nm and 628nm wavelengths. Another prototype device combined three spectral lines for white illumination of intranasal cavities using a low power RGB laser-fiber system attached to the lighting channel of endoscope. Three spectral line images for diagnostic applications were extracted from single snapshot RGB image data in both cases.
This research was funded by the Latvian Council of Science, project “Smart Materials, Photonics, Technologies and Engineering Ecosystem”, No. VPP-EM-FOTONIKA-2022/1-0001 (MOTE), and the EU Recovery and Resilience Facility project "Internal and External Consolidation of the University of Latvia" (No.5.2.1.1.i.0/2/24/I/CFLA/007).
References.
1. J.Spigulis, I.Oshina, A Berzina., A.Bykov, “Smartphone snapshot mapping of skin chromophores under triple-wavelength laser illumination”, J.Biomed.Opt., 22(9), 091508 (2017).
2. J.Spigulis, I.Oshina, M., Matulenko “Laser illumination designs for snapshot multi-spectral-line imaging”, IEEE Xplore, https://ieeexplore.ieee.org/document/8872998 (2019).
3. D.Pfafrods, M.Stafeckis, J.Spigulis, D.Boucher, “Side-emitting optical fiber”, patent LV 11644 B (1995).
4. J.Spigulis, I.Oshina, Z.Rupenheits, M.Matulenko, “Device for uniform surface illumination simultaneously by several laser spectral lines”, patent LV 15491 B (2020).
5. J.Spigulis. Ultra-Narrowband Multipectral Imaging: Techniques and Applications., CRC Press, Boca Raton, USA / Abingdon, UK (2024).
