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Optimizing frequency-domain fluorescence lifetime sensing for high-throughput applications: photon economy and acquisition speed

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Abstract

The signal-to-noise ratio of a measurement is determined by the photon economy of the detection technique and the available photons that are emitted by the sample. We investigate the efficiency of various frequency-domain lifetime detection techniques also in relation to time-domain detection. Nonlinear effects are discussed that are introduced by the use of image intensifiers and by fluorophore saturation. The efficiency of fluorescence lifetime imaging microscopy setups is connected to the speed of acquisition and thus to the imaging throughput. We report on the optimal conditions for balancing signal-to-noise ratio and acquisition speed in fluorescence lifetime sensing.

© 2007 Optical Society of America

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