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Comparison of optically‐derived biomarkers in healthy and brain tumor tissue under one‐ and two‐photon excitation
Author(s) -
Sibai Mira,
Mehidine Hussein,
Moawad Emile Kaadou,
Juchaux Marjorie,
Varlet Pascale,
Devaux Bertrand,
Abi Haidar Darine
Publication year - 2019
Publication title -
journal of biophotonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 66
eISSN - 1864-0648
pISSN - 1864-063X
DOI - 10.1002/jbio.201900111
Subject(s) - two photon excitation microscopy , brain tumor , brain tissue , pathology , fluorescence , optical imaging , biopsy , medicine , optical density , fluorescence lifetime imaging microscopy , biomedical engineering , radiology , materials science , optics , physics , ophthalmology
The surgical outcome of brain tumor resection and needle biopsy is significantly correlated to the patient's prognosis. Brain tumor surgery is limited to resecting the solid portion of the tumor as current intraoperative imaging modalities are incapable of delineating infiltrative regions. For accurate delineation, in situ tissue interrogation at the submicron scale is warranted. Additionally, multimodal detection is required to remediate the genetically and molecularly heterogeneous nature of brain tumors, notably, that of gliomas, meningioma and brain metastasis. Multimodal detection, such as spectrally‐ and temporally‐resolved fluorescence under one‐ and two‐photon excitation, enables characterizing tissue based on several endogenous optical contrasts. In order to assign the optically‐derived parameters to different tissue types, construction of an optical database obtained from biopsied tissue is warranted. This report showcases the different quantitative and semi‐quantitative optical markers that may comprise the tissue discrimination database. These include: the optical index ratio, the optical redox ratio, the relative collagen density, spectrally‐resolved fluorescence lifetime parameters, two‐photon fluorescence imaging and second harmonic generation imaging.