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

Ivan Ezhov, Luca Giannoni, Suprosanna Shit, Frederic Lange, Florian Kofler, Bjoern Menze, Ilias Tachtsidis, Daniel Rueckert

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish
DOIs
StatePublished - 2023
Event2023 European Conference on Biomedical Optics, ECBO 2023 - Munich, Germany
Duration: 25 Jun 202329 Jun 2023

Conference

Conference2023 European Conference on Biomedical Optics, ECBO 2023
Country/TerritoryGermany
CityMunich
Period25/06/2329/06/23

Keywords

  • Biomedical optics
  • Brain surgery
  • Hyperspectral imaging
  • Spectral analysis
  • Statistical analysis

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