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Fluorescence lifetime tomography of live cells expressing enhanced green fluorescent protein embedded in a scattering medium exhibiting background autofluorescence

Soloviev, VY; McGinty, J; Tahir, KB; Neil, MAA; Sardini, A; Hajnal, JV; ... French, PMW; + view all (2007) Fluorescence lifetime tomography of live cells expressing enhanced green fluorescent protein embedded in a scattering medium exhibiting background autofluorescence. OPT LETT , 32 (14) 2034 - 2036.

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Abstract

We present a novel fluorescence lifetime tomography system applied to a highly scattering autofluorescent phantom containing live cells expressing the fluorophore enhanced green fluorescent protein (EGFP). The fluorescence signal was excited using a fiber-laser-pumped supercontinuum source and detected using wide-field time gating imaging. To facilitate rapid 3D reconstruction of the fluorescence lifetime distribution, the time-resolved data were Fourier-transformed in time to give complex functions that formed a data set for the Fourier domain reconstruction. Initially the presence of an unspecified background autofluorescence signal impeded reconstruction of the lifetime distribution, but we show that this problem can be addressed using a simple iterative technique. (C) 2007 Optical Society of America.

Type:Article
Title:Fluorescence lifetime tomography of live cells expressing enhanced green fluorescent protein embedded in a scattering medium exhibiting background autofluorescence
Keywords:MOLECULAR TOMOGRAPHY, BIOLOGICAL TISSUE, TURBID MEDIA, DOMAIN
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Computer Science

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