Books and peer-reviewed journal papers

 

1.     J.Spigulis. “Ultra-narrowband multispectral imaging. Techniques and applications”, 97 p. CRC Press / Taylor & Francis, Boca Raton, USA (2024). https://doi.org/10.1201/9781003476702.

  1. J.Spigulis, U.Rubins, E.Kviesis-Kipge, I.Saknite, I.Oshina, E.Vasilisina, “Triple spectral line imaging of whole-body human skin: equipment, image processing, and clinical data”, Sensors 24, 7348 (2024). DOI:10.3390/s24227348. https://www.mdpi.com/1424-8220/24/22/7348.
  2. U.Rubīns, A.K.Krieviņa, K.Peksis, J.Spīgulis, “Endoscopic colour analysis of nasal mucosa: methodology and clinical data”, Proc.Latv.Acad.Sci., Sec.B, 78(3), pp.185-190 (2024). https://doi.org/10.2478/prolas-2024-0026.
  3. I.Saknite, S.Kwun, K.Zhang, A.Hood, F.Chen, L.Kangas, P.Kortteisto, A.Kukkonen, J.Spigulis, E.R.Tkaczyk, “Hyperspectral imaging to accurately segment skin erythema and hyperpigmentation in cutaneous chronic graft-versus-host disease,” J.Biophot. e202300009 (2023). DOI: 10.1002/jbio.202300009.
  4. I.Oshina, J.Spigulis, I.Kuzmina, L.Dambite, A.Berzina, “Three-dimensional representation of triple spectral line imaging data as an option for noncontact skin diagnostics”, J.Biomed.Opt. 27(9), 095005 (2022). doi: 10.1117/1.JBO.27.9.095005.
  5. I.Kuzmina, I.Oshina, L.Dambite, V.Lukinsone, A.Maslobojeva, A.Berzina, J.Spigulis, “Skin chromophore mapping by smartphone RGB camera under spectral band and spectral line illumination”, J.Biomed.Opt. 27(2), 026004 (2022). doi: 10.1117/1.JBO.27.2.026004.
  6. T.Fisher,…, I.Oshina,…, J.Spigulis, et.al, “Profiling and imaging of forensic evidence – a pan-European forensic round robin study part 1: Document forgery”, Science & Justice 62(4), p. 433-447 (2022). https://doi.org/10.1016/j.scijus.2022.06.001.

8.     I.Oshina, J.Spigulis, “Beer-Lambert law for optical tissue diagnostics: current state of the art and the main limitations”, J.Biomed.Opt. 26(10), 100901 (2021). https://doi.org/10.1117/1.JBO.26.10.100901.

9.     J.Spigulis, V.Lukinsone, I.Oshina, E.Kviesis-Kipge, M.Tamosiunas, A.Lihachev, "Riga Group’s recent results on laser applications for skin diagnostics", J.Phys.: Conf. Ser. 1859, 012033 (2021); https://iopscience.iop.org/article/10.1088/1742-6596/1859/1/012033.

10. J.Spigulis, Z.Rupenheits, U.Rubins, M.Mileiko, I.Oshina, “Spectral line reflectance and fluorescence imaging device for skin diagnostics”, Appl. Sci. 10, 7472 (2020); https://www.mdpi.com/2076-3417/10/21/7472..

  1. V.Lukinsone, A.Maslobojeva, U.Rubins,  M.Kuzminskis, M.Osis, J.Spigulis, “Remitted photon path lengths in human skin:  in-vivo measurement data”, Biomed.Opt.Expr. 11(5), 2866-2873 (2020). https://doi.org/10.1364/BOE.388349.
  2. “Biophotonics—Riga 2020”, SPIE Proceedings, vol.11585 (2020). Editor: Janis Spigulis. https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11585.toc.
  3. M.Tamošiūnas, E.V.Plorina, M.Lange, A.Derjabo, I.Kuzmina, D.Bļizņuks, J.Spigulis, “Autofluorescence imaging for recurrence detection in skin cancer post-operative scars”, J.Biophoton. 13(3),  e201900162 (2020).  https://doi.org/10.1002/jbio.201900162 .
  4. M.Osis, V.Lukinsone, J.Latvels, I.Kuzmina, U.Rubins, J.Spigulis, “Skin remittance kinetics at the spectral range 550-790 nm”, Quant.Electr., 49(1), 2–5 (2019).
  5. B.Cugmas, E.Šturc, J.Spigulis, "Photoplethysmography in dogs and cats: a selection of alternative measurement sites for pet monitor", Physiol.Measurment, 40(1), 01NT02 (2019).

16. J.Spigulis, “Multispectral, fluorescent and photoplethysmographic imaging for remote skin assessment” – in: Optical Methods in Sensing and Imaging for Medical and Biological Applications, Ed. D.Indjin, Ž.Cveič, M.Jedrzejewska-Szsczerska (2019). ISBN 978-3-03897-371-3, mdpi.com/books/pdfview/book/1107.

  1. A.Lihachev, l.Lihacova, E.V.Plorina, M.Lange, A.Derjabo, J.Spigulis, Differentiation of seborrheic keratosis from basal cell carcinoma, nevi and melanoma by RGB autofluorescence imaging, Biomed.Opt. Express, 9(4),1852-1858 (2018).
  2. J.Spigulis, Multispectral, fluorescent and photoplethysmographic imaging for remote skin assessment, Sensors, 17, 1165 (2017).
  3. 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).
  4. “Biophotonics—Riga 2017”, SPIE Proceedings, vol.10592 (2018). Editor: Janis Spigulis. https://spie.org/Publications/Proceedings/Volume/10592.
  5. I.Saknite, A.Zavorins, I.Zablocka, J.Kisis, J.Spigulis, Comparison of a near-infrared reflectance spectroscopy system and skin conductance measurements for in vivo estimation of skin hydration: a clinical study, J.Biomed.Photon.Engin., 3(1), 010310 (2017).
  6. J.Spigulis. “In vivo skin imaging prototypes “made in Latvia””, Front. Optoelectron., 1–12,  https://doi.org/10.1007/s12200-017-0717-5 (2017).
  7. I.Saknite, A.Zavorins, D.Jakovels, J.Spigulis, J.Kisis. Comparison of single-spot technique and RGB imaging for erythema index estimation. Physiol.Meas., 37(3), 333-346 (2016).
  8. J.Spigulis, I.Oshina. Snapshot RGB mapping of skin melanin and hemoglobin. J.Biomed. Opt, 20(5), 050503 (2015).
  9. A.Lihachev, A.Derjabo, I.Ferulova, M.Lange, I.Lihacova, J.Spigulis. Autofluorescence imaging of Basal Cell Carcinoma by smartphone RGB camera. J.Biomed.Opt., 20(12), 120502 (2015).
  10. I.Kuzmina, M.Lacis, J.Spigulis, A.Berzina, L.Valaine. Study of smartphone suitability for mapping of skin chromophores. J.Biomed.Opt., 20(9), 090503, 2015.
  11. I.Ferulova, A.Lihachev, J.Spigulis. Photobleaching effects on in-vivo skin autofluorescence lifetime. J.Biomed.Opt., 20(5), 051031 (2015).
  12. Lihachev, I. Ferulova, K. Vasiljeva, J. Spigulis. Investigation of in-vivo skin autofluorescence lifetimes under long-term cw optical excitation. Quant.Electr., 44 (8), 770-773 (2014).
  13. “Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8)”, SPIE Proceedings, vol.9421 (2014). Editor: Janis Spigulis. https://spie.org/Publications/Proceedings/Volume/9421
  14. J.Spigulis, U.Rubins, E.Kviesis-Kipge, O.Rubenis. SkImager: a concept device for in-vivo skin assessment by multimodal imaging. Proc.Est.Acad.Sci., 63(3), 213-220 (2014).
  15. A.Silapetere, I.Saknite, J.Spigulis. Development and experimental study of phantoms for mapping skin chromophores. Latv.J.Phys.Techn. Sci., 51 (3), 58-66 (2014).
  16. U.Rubins, J.Zaharans, I.Lihacova, J.Spigulis. Multispectral video-microscope modified for skin diagnostics. Latv.J.Phys.Techn.Sci., 51(5), 65-70 (2014).
  17. D.Jakovels, I.Kuzmina, A.Berzina, L.Valeine, J.Spigulis. Noncontact monitoring of vascular lesion phototherapy efficiency by RGB multispectral imaging. J.Biomed.Opt., v.18, No.12,126019 (2013).
  18. “Biophotonics—Riga 2013”, SPIE Proceedings, vol. 9032 (2013). Editors: Janis Spigulis and Ilona Kuzmina. https://spie.org/Publications/Proceedings/Volume/9032.
  19. I.Diebele, I.Kuzmina, A.Lihachev, J.Spigulis, J.Kapostinsh, A.Derjabo, L.Valaine. Clinical evaluation of melanomas and common nevi by spectral imaging, Biomed.Opt.Express,v.3, No.3, pp. 467-472, 2012.
  20. J.Spigulis. Biophotonic technologies for noninvasive assessment of skin condition and blood microcirculation. Latv.J.Phys.Techn.Sci., v.49, No.5, pp.63-80 (2012).
  21. A.Bekina, I.Diebele, U.Rubins, J.Zaharans, A.Derjabo, J.Spigulis. Multispectral assessment of skin malformations by modified video-microscope. Latv.J.Phys.Techn.Sci., v.49, No.5, pp.4-8 (2012).
  22. D.Jakovels, J.Spigulis. RGB imaging device for mapping and monitoring of hemoglobin distribution in skin. Lith. J.Phys., v.52, No.1, pp. 50-54 (2012).
  23. L.Asare, E.Kviesis-Kipge, M.Ozols, J.Spigulis, R.Erts. Multi-spectral Optoelectronic Device for Skin Microcirculation Analysis. Lith. J.Phys., v.52, No.1, pp. 59-62 (2012).
  24. I.Ferulova, A.Rieba, J.Lesins, A.Berzina, A.Lihachev, J.Spigulis. Portable device for skin autofluorescence photobleaching measurements. Lith. J.Phys., v.52, No.1, pp. 55-58 (2012).
  25. I.Kuzmina, I. Diebele, D. Jakovels, J.Spigulis, L..Valeine, J. Kapostinsh. Towards noncontact skin melanoma selection by multispectral imaging analysis, J. Biomed. Opt., v.16, No.6, 060502 (2011).
  26. I.Kuzmina, I.Diebele, J.Spigulis, L.Valeine, A.Kempele, A.Abelite. Contact and contactless diffuse reflectance spectroscopy: potential for recovery monitoring of vascular lesions after intense pulsed light treatment, J. Biomed. Opt., v. 16, No.4, 040505 (2011).
  27. Saknite, D. Jakovels, J. Spigulis. Distant determination of bilirubin distribution in skin by multi-spectral imaging. Latv.J.Phys.Tech.Sci., No.2, p.50-55 (2011).
  28. Lihachev, J. Lesins, D. Jakovels, J. Spigulis. Low power cw-laser signatures on human skin, Quant. Electr., v. 40, No.12, 1077-1080 (2010).
  29. D. Jakovels and J. Spigulis, 2-D mapping of skin chromophores in the spectral range 500-700 nm, J. Biophoton. v.3, No. 3, pp. 125–129 (2010).
  30. R. Erts, E. Kviesis-Kipge, J. Zaharans, E. Zaharans, J. Spigulis. Wireless photoplethysmography finger sensor probe, IEEE Explore, 10.1109/BEC.2010.5630194, p. 283-284 (2010).
  31. Spigulis, A. Lihachev, and R. Erts, Imaging of laser-excited tissue autofluorescence bleaching rates, Appl. Opt., v. 48, No. 10, pp. D163-D168 (2009).
  32. “14th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics”,  IFMBE Proceedings, vol. 20, Springer (2008), Edittors: Alexey Katashev, Yuri Dekhtyar and Janis Spigulis. https://www.springer.com/gp/book/9783540693666#aboutBook
  33. Gailite, J. Spigulis, A. Lihachev. Multilaser photoplethysmography technique. Las. Med. Sci., v. 23, pp. 189-193 (2008).
  34. “Sixth International Conference on Advanced Optical Materials and Devices (AOMD-6)” (2008), SPIE Proceedings vol. 7142, Editors: Janis Spigulis, Andris Krumins, Donats Millers, Andris Sternberg, Inta Muzikante, Andris Ozols, Maris Ozolins. https://spie.org/Publications/Proceedings/Volume/7142
  35. J. Spigulis, L. Gailite, A. Lihachev, R. Erts. Simultaneous recording of skin blood pulsations at different vascular depths by multi-wavelength photoplethysmography, Appl. Opt., v. 46, No. 10, pp. 1754-1759 (2007).
  36. Lihachev, J. Spigulis. Skin autofluorescence fading at 405/532 nm laser excitation. IEEE Xplore, 10.1109/NO, pp. 63-65 (2007).
  37. Soto Thompson, T. Johansson, N. Bendsoe, A. Derjabo, J. Kapostinsh, S. Palsson, U. Stenram, S. Andesson-Engels, J. Spigulis, S. Svanberg, K. Svanberg. Photodynamic therapy of nodural Basal Cell Carcinoma with multi-fibre contact light delivery, J. Envir. Path., Toxic. Onc., v. 25, p. 411-424 (2006).
  38. Lihachev, J. Spigulis. Skin autofluorescence: intensity fading at 405 nm and 532 nm laser excitation. Latv. J. Phys. Techn. Sci., No. 2(II), pp. 116-120 (2006).
  39. J. Spigulis. Optical non-invasive monitoring of skin blood pulsations. Appl. Opt., v. 44, No. 10, pp. 1850-1857 (2005).
  40. R. Erts, J. Spigulis, I. Kukulis, M. Ozols. Bilateral photoplethysmography studies of the leg arterial stenosis. Physiol. Meas., v. 26, pp. 865-874 (2005).
  41. J. Spigulis. Side-emitting optical fibers brighten our world in new ways. Opt. Photon. News, pp. 34-39, Oct. (2005).
  42. "Advanced Optical Devices, Technologies, and Medical Applications", SPIE Proceedings vol. 5123 (2003), Editors: J. Spigulis, J. Teteris, M. Ozolinsh, A. Lusis,  https://www.spiedigitallibrary.org/conference-proceedings-of-spie/5123.toc
  43. Apine, J. Spigulis, P. A. Oberg,  Microcirculation in masseteric muscles at permanent muscular facial pain in krandiomandibular dysfunction, Med. Biol. Eng. Comput., v. 37, p. 327, 1999.
  44. Y. Dektyar, J. Spigulis, et al. Joint Baltic Biomedical Engineering and Physics courses. – Med. Biol. Eng. Comput., v. 37, Suppl. 1, p. 144-145, 1999.
  45. G. Venckus, J. Spigulis. Frequency filtering effects on the single period photoplethysmography signals. Med. Biol. Eng. Comput., v. 37, Suppl. 1, pp. 218-219 (1999).
  46. J. Spigulis, J. Lazdins, D. Pfafrods, M. Stafeckis. Side-emitting optical fibers for clinical applications. Med. Biol. Eng. Comput., v.34, Suppl.1, Pt. 1. p. 285-286 (1996).
  47. "Optical Inorganic Dielectric Materials and Devices", SPIE Proceedings vol. 2967 (1997), Editors: A. Krumins, D. K. Milllers, A. Sternberg, J. Spigulis. https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2967.toc
  48. J. Spigulis. Compact dielectric reflective elements. 1. Half-sphere concentrators of radially emitted light. Appl. Opt., v. 33, No. 25, p. 5970 – 5974 (1994).
  49. J. Spigulis, J. Lazdins. Compact dielectric reflective elements. 2. Multichannel filter of closely spaced spectral bands. Appl. Opt., v. 33, No. 28, p. 6638-6641 (1994).
  50. J. Spigulis, A. Rieba, M. Vitols. Detector of the optical fiber faults. PTE, Moscow (Instrum. & Experim. Techn., Plenum Publ., USA), No 6, p. 184 (1989).
  51. J. Spigulis. Radio-frequency electrodeless tubes as optical temperature sensors.  PTE, Moscow (Instrum. & Experim. Techn., Plenum Publ., USA), No.3, p. 209 (1983).
  52. A.Briuhovetski, J. Spigulis, R. Orlov. Calibrator of pulsed radiation. PTE, Moscow (Instrum. & Experim. Techniques, Plenum Publ., USA), No 1, p. 225 – 226 (1983).
  53. A.Bulishev, V.Malkin, N.Preobrazhensky, J.Spigulis. Kinetics of excitation transfer in mixtures of metal vapors and molecular gases. Opt. Spectrosc. (USSR), v.46, No. 6, p. 639 (1979).