A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
FPI Based Hyperspectral Imager for the Complex Surfaces : Calibration, Illumination and Applications (2022)

Raita-Hakola, A.-M., Annala, L., Lindholm, V., Trops, R., Näsilä, A., Saari, H., Ranki, A., & Pölönen, I. (2022). FPI Based Hyperspectral Imager for the Complex Surfaces : Calibration, Illumination and Applications. Sensors, 22(9), Article 3420. https://doi.org/10.3390/s22093420

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Raita-Hakola, Anna-Maria; Annala, Leevi; Lindholm, Vivian; Trops, Roberts; Näsilä, Antti; Saari, Heikki; Ranki, Annamari; Pölönen, Ilkka

Lehti tai sarja: Sensors

eISSN: 1424-8220

Julkaisuvuosi: 2022

Ilmestymispäivä: 29.04.2022

Volyymi: 22

Lehden numero: 9

Artikkelinumero: 3420

Kustantaja: MDPI AG

Julkaisumaa: Sveitsi

Julkaisun kieli: englanti

DOI: https://doi.org/10.3390/s22093420

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/80902

Tiivistelmä

Hyperspectral imaging (HSI) applications for biomedical imaging and dermatological applications have been recently under research interest. Medical HSI applications are non-invasive methods with high spatial and spectral resolution. HS imaging can be used to delineate malignant tumours, detect invasions, and classify lesion types. Typical challenges of these applications relate to complex skin surfaces, leaving some skin areas unreachable. In this study, we introduce a novel spectral imaging concept and conduct a clinical pre-test, the findings of which can be used to develop the concept towards a clinical application. The SICSURFIS spectral imager concept combines a piezo-actuated Fabry–Pérot interferometer (FPI) based hyperspectral imager, a specially designed LED module and several sizes of stray light protection cones for reaching and adapting to the complex skin surfaces. The imager is designed for the needs of photometric stereo imaging for providing the skin surface models (3D) for each captured wavelength. The captured HS images contained 33 selected wavelengths (ranging from 477 nm to 891 nm), which were captured simultaneously with accordingly selected LEDs and three specific angles of light. The pre-test results show that the data collected with the new SICSURFIS imager enable the use of the spectral and spatial domains with surface model information. The imager can reach complex skin surfaces. Healthy skin, basal cell carcinomas and intradermal nevi lesions were classified and delineated pixel-wise with promising results, but further studies are needed. The results were obtained with a convolutional neural network.

YSO-asiasanat: hyperspektrikuvantaminen; iho; ihotaudit; ihosyöpä; diagnostiikka; koneoppiminen; neuroverkot

Vapaat asiasanat: hyperspectral; FPI; calibration; interferometry; optical modelling; convolutional neural network; LED illumination; photometric stereo; skin surface model; biomedical imaging; dermatological application; optical biopsy

Liittyvät organisaatiot

Hankkeet, joissa julkaisu on tehty

OKM-raportointi: Kyllä

VIRTA-lähetysvuosi: 2022

JUFO-taso: 1