Ms. Anna Maslobojeva Profile

Anna Maslobojeva

at Univ of Latvia

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Publications (6)

SPIE Journal Paper | 21 February 2022 Open Access

Skin chromophore mapping by smartphone RGB camera under spectral band and spectral line illumination

Ilona Kuzmina, Ilze Oshina, Laura Dambite, Vanesa Lukinsone, Anna Maslobojeva, Anna Berzina, Janis Spigulis

JBO, Vol. 27, Issue 02, 026004, (February 2022) https://doi.org/10.1117/12.10.1117/1.JBO.27.2.026004

KEYWORDS: Skin, Light emitting diodes, Prototyping, Chromophores, RGB color model, Cameras, Photons, Fiber optic illuminators, Image processing, Diagnostics

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Significance: Multispectral imaging enables mapping of chromophore content changes in skin neoplasms, which helps to diagnose a pathology. Different types of light sources can be used for the imaging. Design of laser-based illuminators is more complicated and, consequently, they are more expensive than LED-based illuminators. On the other hand, spectral line illumination has the advantage of less complicated calculations, since only the discrete maximum wavelengths need to be considered. Spectral band and spectral line approaches for multispectral skin diagnostics have not been compared so far. This can help to evaluate the accuracy and effectiveness of both approaches. Aim: To compare two specific illumination modalities—spectral band and spectral line illumination—from the point of performance for mapping of in vivo skin chromophores. Approach: Three spectral images of the same skin malformations were captured by a smartphone RGB camera with two different add-on illuminators comprising LED emitters and laser emitters, respectively. Five types of benign skin neoplasms were included in our study. Concentrations of skin melanin, oxy- and deoxy-hemoglobin at image pixel groups were calculated using the Beer–Lambert law. Results: Skin chromophore maps and statistical analysis of mean concentrations’ changes in the neoplasms compared to the surrounding skin are presented and discussed. The data of the laser emitters led to significantly higher (∼10 times) increase of the oxy-hemoglobin values in vascular neoplasms and much lower deoxy-hemoglobin values, if compared to the data obtained by the LED emitters. Conclusions: Analysis of the obtained chromophore distribution maps and concentration variations in neoplasms led to conclusion that the spectral line illumination approach is more appropriate for this application. Considering only the peak wavelengths of illumination spectral bands leads to essentially different results if compared to those obtained by spectral line illumination and may cause misinterpretations in the clinical assessment of skin neoplasms.

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Proceedings Article | 20 August 2020 Presentation

Skin chromophore mapping from multi-spectral laser line images

Ilze Ošina, Ilona Kuzmina, Uldis Rubins, Vanesa Lukinsone, Anna Maslobojeva, Laura Dambite, Margarita Matulenko, Zigmars Rupenheits, Janis Spigulis

Proceedings Volume 11483, 114830A (2020) https://doi.org/10.1117/12.2568069

KEYWORDS: Skin, Chromophores, In vivo imaging, Diagnostics, Cancer, Skin cancer, Prototyping, Tissue optics, Light scattering, Wound healing

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Proceedings Article | 2 April 2020 Presentation + Paper

Remitted photon path length in human skin, skin phantoms and cell cultures

V. Lukinsone, I. Kuzmina, M. Tamosiunas, A. Maslobojeva, M. Kuzminskis, U. Rubins, J. Spigulis

Proceedings Volume 11363, 1136320 (2020) https://doi.org/10.1117/12.2555822

KEYWORDS: Skin, Tissues, Photon transport, Chromophores, Picosecond phenomena, Light scattering, Time correlated photon counting

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Proceedings Article | 2 April 2020 Presentation + Paper

Agar-based phantoms for skin diagnostic imaging

Ilona Kuzmina, Vanesa Lukinsone, Uldis Rubins, Ilze Osina, Laura Dambite, Anna Maslobojeva, Janis Spigulis

Proceedings Volume 11363, 113630F (2020) https://doi.org/10.1117/12.2555674

KEYWORDS: RGB color model, Skin, Prototyping, Absorption, Diffuse reflectance spectroscopy, Chromophores, Transmittance, Light emitting diodes, Optical properties, Scattering

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Proceedings Article | 17 February 2020 Paper

Towards combined multispectral, FLIM and Raman imaging for skin diagnostics

J. Spigulis, I. Kuzmina, V. Lukinsone, M. Tamošiūnas, I. Oshina, L. Ozolina, A. Maslobojeva, M. Kuzminskis, D. Ivanov, E. Borisova

Proceedings Volume 11232, 112320N (2020) https://doi.org/10.1117/12.2559107

KEYWORDS: Raman spectroscopy, Skin, Diagnostics, Multispectral imaging, Luminescence, Prototyping, Fluorescence lifetime imaging, Light emitting diodes, Cameras, RGB color model

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Proceedings Article | 22 July 2019 Paper

Towards direct measurements of remitted photon path lengths in skin: kinetic studies in the range 520-800 nm

V. Lukinsone, M. Osis, J. Latvels, I. Kuzmina, U. Rubins, N. Zorina, A. Maslobojeva, J. Spigulis

Proceedings Volume 11075, 1107505 (2019) https://doi.org/10.1117/12.2526663

KEYWORDS: Skin, Signal detection, Picosecond phenomena, Absorption, Tissues, Chromophores, Neodymium, Scattering, Data processing, Tissue optics

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Showing 5 of 6 publications

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