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Line excitation array detection fluorescence microscopy at 0.8 million frames per second.


ABSTRACT: Three-dimensional, fluorescence imaging methods with ~1?MHz frame rates are needed for high-speed, blur-free flow cytometry and capturing volumetric neuronal activity. The frame rates of current imaging methods are limited to kHz by the photon budget, slow camera readout, and/or slow laser beam scanners. Here, we present line excitation array detection (LEAD) fluorescence microscopy, a high-speed imaging method capable of providing 0.8 million frames per second. The method performs 0.8?MHz line-scanning of an excitation laser beam using a chirped signal-driven longitudinal acousto-optic deflector to create a virtual light-sheet, and images the field-of-view with a linear photomultiplier tube array to generate a 66?×?14 pixel frame each scan cycle. We implement LEAD microscopy as a blur-free flow cytometer for Caenorhabditis elegans moving at 1?m?s-1 with 3.5-µm resolution and signal-to-background ratios >200. Signal-to-noise measurements indicate future LEAD fluorescence microscopes can reach higher resolutions and pixels per frame without compromising frame rates.

SUBMITTER: Martin C 

PROVIDER: S-EPMC6206139 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Line excitation array detection fluorescence microscopy at 0.8 million frames per second.

Martin Chris C   Li Tianqi T   Hegarty Evan E   Zhao Peisen P   Mondal Sudip S   Ben-Yakar Adela A  

Nature communications 20181029 1


Three-dimensional, fluorescence imaging methods with ~1 MHz frame rates are needed for high-speed, blur-free flow cytometry and capturing volumetric neuronal activity. The frame rates of current imaging methods are limited to kHz by the photon budget, slow camera readout, and/or slow laser beam scanners. Here, we present line excitation array detection (LEAD) fluorescence microscopy, a high-speed imaging method capable of providing 0.8 million frames per second. The method performs 0.8 MHz line-  ...[more]

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