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Ezhov, I.* ; Giannoni, L.* ; Shit, S.* ; Lange, F.* ; Kofler, F. ; Menze, B.* ; Tachtsidis, I.* ; Rueckert, D.*

Identifying chromophore fingerprints of brain tumor tissue on hyperspectral imaging using principal component analysis.

In: (Diffuse Optical Spectroscopy and Imaging IX 2023, 25-28 June 2023, Munich). SPIE, 2023. (Proc. SPIE ; 12628)

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Hyperspectral imaging (HSI) is an optical technique that processes the electromagnetic spectrum at a multitude of monochromatic, adjacent frequency bands. The wide-bandwidth spectral signature of a target object's reflectance allows fingerprinting its physical, biochemical, and physiological properties. HSI has been applied for various applications, such as remote sensing and biological tissue analysis. Recently, HSI was also used to differentiate between healthy and pathological tissue under operative conditions in a surgery room on patients diagnosed with brain tumors. In this article, we perform a statistical analysis of the brain tumor patients' HSI scans from the HELICoiD dataset with the aim of identifying the correlation between reflectance spectra and absorption spectra of tissue chromophores. By using the principal component analysis (PCA), we determine the most relevant spectral features for intra- and inter-tissue class differentiation. Furthermore, we demonstrate that such spectral features are correlated with the spectra of cytochrome, i.e., the chromophore highly involved in (hyper) metabolic processes. Identifying such fingerprints of chromophores in reflectance spectra is a key step for automated molecular profiling and, eventually, expert-free biomarker discovery.

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Publication type Article: Conference contribution

Corresponding Author

Keywords Biomedical Optics ; Brain Surgery ; Hyperspectral Imaging ; Spectral Analysis ; Statistical Analysis

ISSN (print) / ISBN 0277-786X

e-ISSN 1996-756X

Conference Title Diffuse Optical Spectroscopy and Imaging IX 2023

Conference Date 25-28 June 2023

Conference Location Munich

Journal Proceedings of SPIE

Quellenangaben Volume: 12628

Publisher SPIE

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Helmholtz Artifical Intelligence Cooperation Unit (HAICU)