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Performance of optoacoustic and fluorescence imaging in detecting deepseated fluorescent agents.

Biomed. Opt. Express 9, 2229-2239 (2018)
Verlagsversion Postprint DOI
Open Access Gold
Creative Commons Lizenzvertrag
Fluorescent contrast agents are widely employed in biomedical research. While many studies have reported deep tissue imaging of fluorescent moieties using either fluorescence-based or absorption-based (optoacoustic) imaging systems, no systematic comparison has been performed regarding the actual performance of these imaging modalities in detecting deep-seated fluorescent agents. Herein, an integrated imager combining epifluorescence and volumetric optoacoustic imaging capabilities has been employed in order to evaluate image degradation with depth for several commonly-used near-infrared dyes in both modes. We performed controlled experiments in tissue-mimicking phantoms containing deeply embedded targets filled with different concentrations of Alexa Fluor 700, Alexa Fluor 750, indocyanine green (ICG) and IRDye 800CW. The results are further corroborated by multi-modal imaging of ICG through mouse tissues in vivo. It is shown that optoacoustics consistently provides better sensitivity in differentiating fluorescent targets located at depths beyond 2 mm in turbid tissues, as quantified by evaluating image contrast, signal to noise ratio and spatial resolution performance.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Fluorescence Microscopy ; Photoacoustic Imaging ; Photoacoustic Imaging ; Three-dimensional Image Acquisition ; Vision - Contrast Sensitivity
ISSN (print) / ISBN 2156-7085
e-ISSN 2156-7085
Quellenangaben Band: 9, Heft: 5, Seiten: 2229-2239 Artikelnummer: , Supplement: ,
Verlag Optical Society of America (OSA)
Begutachtungsstatus Peer reviewed