Optimization of spatial resolution and scattering effects for biomedical fluorescence imaging by using sub-regions of the shortwave infrared spectrum

Benjamin Musnier (1) , Maxime Henry , Julien Vollaire , Jean-Luc Coll , Yves Usson , Véronique Josserand , Xavier Le Guével

1 IAB - Institute for Advanced Biosciences / Institut pour l'Avancée des Biosciences (Grenoble)

We evaluated the impact of light-scattering effects on spatial resolution in different SWIR sub-regions by analyzing two SWIR emissive phantoms made of PDMS-gold nanoclusters (Au NCs) composite covered with mice skin, or capillary tubes filled with Au NCs or IRDye 800CW at different depth in intralipids and finally, after administration of the Au NCs intravenously in mice. Our findings highlighted the benefit of working at the highest tested spectral range of the SWIR region with a 50% enhancement of spatial resolution measured in artificial model when moving

Keywords: fluorescence imaging; gold nanoclusters; tissue penetration; scattering; fluorescence imaging

Domains: Chemical Sciences; Physics [physics]; Life Sciences [q-bio]

Benjamin Musnier, Maxime Henry, Julien Vollaire, Jean-Luc Coll, Yves Usson, et al.. Optimization of spatial resolution and scattering effects for biomedical fluorescence imaging by using sub-regions of the shortwave infrared spectrum. Journal of Biophotonics, 2020, 14 (4), pp.4973-4981. ⟨10.1002/jbio.202000345⟩. ⟨hal-02985264⟩